Archive of Yellowstone Updates for 2008
Monday, December 29, 2008 19:07 MST (Tuesday, December 30, 2008 02:07 UTC)
YELLOWSTONE VOLCANO (CAVW#1205-01-)
44.43°N 110.67°W, Summit Elevation 9203 ft (2805 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
Earthquake swarm beneath Yellowstone Lake continues.
PRESS RELEASE FROM YVO PARTNER UNIVERSITY OF UTAH SEISMOGRAPH STATIONS
Released: December 29, 2008 05:00 PM MST
The University of Utah Seismograph Stations reports that a notable swarm of earthquakes has been underway since December 26 beneath Yellowstone Lake in Yellowstone National Park, three to six miles south-southeast of Fishing Bridge, Wyoming. This energetic sequence of events was most intense on December 27, when the largest number of events of magnitude 3 and larger occurred.
The largest of the earthquakes was a magnitude 3.9 (revised from magnitude 3.8) at 10:15 pm MST on Dec. 27. The sequence has included nine events of magnitude 3 to 3.9 and approximately 24 of magnitude 2 to 3 at the time of this release. A total of more than 250 events large enough to be located have occurred in this swarm. Reliable depths of the larger events are up to a few miles. Visitors and National Park Service (NPS) employees in the Yellowstone Lake area reported feeling the largest of these earthquakes.
Earthquakes are a common occurrence in the Yellowstone National Park area, an active volcanic-tectonic area averaging 1,000 to 2,000 earthquakes a year. Yellowstone's 10,000 geysers and hot springs are the result of this geologic activity. A summary of Yellowstone's volcanic history is available on the Yellowstone Volcano Observatory web site (listed below). This December 2008 earthquake sequence is the most intense in this area for some years and is centered on the east side of the Yellowstone caldera. Scientists cannot identify any causative fault or other feature without further analysis. Seismologists continue to monitor and analyze the data and will issue new information if the situation warrants it.
The University of Utah operates a seismic network in Yellowstone National Park in conjunction with the National Park Service and the U.S. Geological Survey (USGS). These three institutions are partners in the Yellowstone Volcano Observatory.
Data are transmitted to the University in real-time by radio and satellite links from a network of 28 seismographs in the Yellowstone area and are available on the web. Seismologists continue to analyze data from this swarm of earthquakes and provide updates to the NPS and USGS and to the public via the following web pages.
Information on U.S. earthquake activity including Yellowstone can be viewed at the U.S. Geological Survey web site: http://earthquake.usgs.gov/eqcenter/recenteqsus/
Information on earthquakes can also be viewed at the University of Utah Seismograph Stations web site:
http://www.seis.utah.edu/.
Seismographic recordings from Yellowstone seismograph stations can be viewed online at:
http://www.quake.utah.edu/helicorder/heli/yellowstone/index.html.
Persons who felt any of the earthquakes are encouraged to fill out a survey form on the USGS 'Did You Feel It?' web site: http://earthquake.usgs.gov/eqcenter/dyfi/.
Geologic information, maps, and monitoring information for Yellowstone can be found on the Yellowstone Volcano Observatory web site at: http://volcanoes.usgs.gov/yvo/.
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The Yellowstone Volcano Observatory (YVO) is a partnership of the U.S. Geological Survey (USGS), Yellowstone National Park, and University of Utah to strengthen the long-term monitoring of volcanic and earthquake unrest in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.
Saturday, December 27, 2008 20:29 MST (Sunday, December 28, 2008 03:29 UTC)
YELLOWSTONE VOLCANO (CAVW#1205-01-)
44.43°N 110.67°W, Summit Elevation 9203 ft (2805 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
PRESS RELEASE FROM YVO PARTNER UNIVERSITY OF UTAH SEISMOGRAPH STATIONS
Released: December 27, 2008 04:40 PM MST
The University of Utah Seismograph Stations reports that a swarm of small earthquakes of magnitude 3.5 and smaller is occurring beneath Yellowstone Lake in Yellowstone National Park, five to nine miles south-southeast of Fishing Bridge, Wyoming. The swarm began yesterday afternoon, Dec. 26, and has continued and intensified today. The two largest earthquakes in this swarm have been shocks of magnitude 3.5 and 3.4 which occurred at 1:17 and 1:26 pm MST, respectively, today. Many smaller earthquakes have also occurred, including three events this morning of magnitude 2.5 to 2.8 and a magnitude 3.2 event at 3:30 pm MST. Some of the earthquakes in the swarm have been reported felt by people in the Yellowstone Lake area. Swarms of this nature are relatively common in this part of Yellowstone Park.
Summary for Largest Earthquake:
Date (UTC): December 27, 2008 Time (UTC): 20:17
Date (local): December 27, 2008 Time (local): 01:17 PM MST
Latitude: 44 28.85' N
Longitude: 110 21.74' W
Magnitude: average Ml: 3.50
average Mc: 3.6
Reported magnitude: 3.50
For the next ten days, an image of today's recordings from the nearby LKWY seismograph station can be viewed at:
http://www.seis.utah.edu/helicorder/heli/yellowstone/Uuss.LKWY_SHZ_US.2008122700.gif
After ten days, the image will be replaced by more recent data.
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The Yellowstone Volcano Observatory (YVO) is a partnership of the U.S. Geological Survey (USGS), Yellowstone National Park, and University of Utah to strengthen the long-term monitoring of volcanic and earthquake unrest in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.
Monday, December 1, 2008 12:06 MST (Monday, December 1, 2008 19:06 UTC)
YELLOWSTONE VOLCANO (CAVW#1205-01-)
44.43°N 110.67°W, Summit Elevation 9203 ft (2805 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
NOVEMBER 2008 Yellowstone Seismicity Summary
During the month of November 2008, 166 earthquakes were located in the Yellowstone region. The largest event was a magnitude 2.7 on November 23 at 11:41 PM MST, located about 21 miles south southeast of West Thumb, YNP, and near the southern caldera boundary. This event was part of a swarm of 77 events, Nov. 23 -29, with magnitudes -0.3 - 2.7. Two smaller swarms were also recored in November. One located about 9 miles northeast of West Yellowstone, MT. The swarm included 17 events, Nov. 7 - 12, with magnitudes 0.0 - 1.4. The second was located about 17 miles east northeast of West Yellowstone, MT. The swarm included 21 events, Nov. 24 - 25, with magnitudes -0.1 - 1.6.
Earthquake activity in the Yellowstone region is at relatively normal background levels.
Ground Deformation Summary: Through November 2008, continuous GPS data show that much of the Yellowstone caldera continued moving upward, though at a lower rate than the past several years. The maximum measured ground uplift over the past 53 months is ~22 cm at the White Lake GPS station. An example can be found at: http://pboweb.unavco.org/shared/scripts/stations/checkkey=WLWY&sec=timeseries_plots×eries=raw
The general uplift of the Yellowstone caldera is scientifically interesting and will continue to be monitored closely by YVO staff.
An article on the current uplift episode at Yellowstone and discussion of long-term ground deformation at Yellowstone and elsewhere can be found at: http://volcanoes.usgs.gov/yvo/publications/2007/upsanddowns.php
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The Yellowstone Volcano Observatory (YVO) is a partnership of the U.S. Geological Survey (USGS), Yellowstone National Park, and University of Utah to strengthen the long-term monitoring of volcanic and earthquake unrest in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.
Saturday, November 1, 2008 16:50 MDT (Saturday, November 1, 2008 22:50 UTC)
YELLOWSTONE VOLCANO (CAVW#1205-01-)
44.43°N 110.67°W, Summit Elevation 9203 ft (2805 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
OCTOBER 2008 Yellowstone Seismicity Summary
During the month of October 2008, 46 earthquakes were located in the Yellowstone region. The largest event was a magnitude 2.4 on October 5 at 3:12 PM MDT, located about 13 miles northeast of West Yellowstone, MT. No swarms were recorded during October.
Earthquake activity in the Yellowstone region is at relatively low background levels.
Ground Deformation Summary: Through October 2008, continuous GPS data show that much of the Yellowstone caldera continued moving upward, though at a lower rate than the past several years. The maximum measured ground uplift over the past 50 months is ~21 cm at the White Lake GPS station. An example can be found at: http://pboweb.unavco.org/shared/scripts/stations/?checkkey=WLWY&sec=timeseries_plots×eries=raw
The general uplift of the Yellowstone caldera is scientifically interesting and will continue to be monitored closely by YVO staff.
An article on the current uplift episode at Yellowstone and discussion of long-term ground deformation at Yellowstone and elsewhere can be found at: http://volcanoes.usgs.gov/yvo/2007/upsanddowns.html
-----
The Yellowstone Volcano Observatory (YVO) is a partnership of the U.S. Geological Survey (USGS), Yellowstone National Park, and University of Utah to strengthen the long-term monitoring of volcanic and earthquake unrest in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.
Wednesday, October 1, 2008 11:42 MDT (Wednesday, October 1, 2008 17:42 UTC)
YELLOWSTONE VOLCANO (CAVW#1205-01-)
44.43°N 110.67°W, Summit Elevation 9203 ft (2805 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
SEPTEMBER 2008 Yellowstone Seismicity Summary
During the month of September 2008, 62 earthquakes were located in the Yellowstone region. The largest event was a magnitude 2.9 on September 25 at 12:07 PM MDT, located about 16 miles southeast of West Thumb, YNP, and near the southern caldera boundary. This event was part of a swarm of 19 events with magnitudes 0.9 - 2.9.
Earthquake activity in the Yellowstone region is at normal background levels.
Ground Deformation Summary: Through September 2008, continuous GPS data show that much of the Yellowstone caldera continued moving upward, though at a lower rate than the past several years. The maximum measured ground uplift over the past 50 months is ~21 cm at the White Lake GPS station. An example can be found at: http://pboweb.unavco.org/shared/scripts/stations/?checkkey=WLWY&sec=timeseries_plots×eries=raw
The general uplift of the Yellowstone caldera is scientifically interesting and will continue to be monitored closely by YVO staff.
An article on the current uplift episode at Yellowstone and discussion of long-term ground deformation at Yellowstone and elsewhere can be found at: http://volcanoes.usgs.gov/yvo/2007/upsanddowns.html
-----
The Yellowstone Volcano Observatory (YVO) is a partnership of the U.S. Geological Survey (USGS), Yellowstone National Park, and University of Utah to strengthen the long-term monitoring of volcanic and earthquake unrest in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.
Tuesday, September 2, 2008 13:31 MDT (Tuesday, September 2, 2008 19:31 UTC)
YELLOWSTONE VOLCANO (CAVW#1205-01-)
44.43°N 110.67°W, Summit Elevation 9203 ft (2805 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
AUGUST 2008 Yellowstone Seismicity Summary
During the month of August 2008, 146 earthquakes were located in the Yellowstone region. The largest event was a magnitude 2.3 on August 31 at 7:31 AM MDT, located about 17 miles west northwest of West Yellowstone, MT. Three swarms occurred during the month of August. The first was a continuation of of a swarm that started July 28th on the Madison Plateau. The swarm continued until August 5th with an additional 52 events with magnitudes from -0.4 to 2.1, bringing the total for the swarm to 184 earthquakes. The second swarm, between Aug 3 and 7, included 28 events and was located 16 miles east northeast of West Yellowstone, MT with magnitudes 0.0 to 1.4. The third swarm on August 7 and 8 included 32 events, and was located 6 miles southeast of West Thumb. Magnitudes ranged from 0.0 to 2.1.
Earthquake activity in the Yellowstone region is at relatively low background levels.
Ground Deformation Summary: Through August 2008, continuous GPS data show that much of the Yellowstone caldera continued moving upward, though at a lower rate than the past several years. The maximum measured ground uplift over the past 48 months is ~20 cm at the White Lake GPS station. An example can be found at: http://pboweb.unavco.org/shared/scripts/stations/?checkkey=WLWY&sec=timeseries_plots×eries=raw
The general uplift of the Yellowstone caldera is scientifically interesting and will continue to be monitored closely by YVO staff.
An article on the current uplift episode at Yellowstone and discussion of long-term ground deformation at Yellowstone and elsewhere can be found at: http://volcanoes.usgs.gov/yvo/2007/upsanddowns.html
-----
The Yellowstone Volcano Observatory (YVO) is a partnership of the U.S. Geological Survey (USGS), Yellowstone National Park, and University of Utah to strengthen the long-term monitoring of volcanic and earthquake unrest in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.
Monday, August 4, 2008 19:53 MDT (Tuesday, August 5, 2008 01:53 UTC)
YELLOWSTONE VOLCANO (CAVW#1205-01-)
44.43°N 110.67°W, Summit Elevation 9203 ft (2805 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
JULY 2008 Yellowstone Seismicity Summary
During the month of July 2008, 185 earthquakes were located in the Yellowstone region. The largest event was a magnitude 2.5 on July 31 at 7:22 AM MDT, located about 6 miles southwest of Madison Junction, WY. The event is part of an ongoing swarm of 132 earthquakes on the Madison Plateau, July 28-31, with magnitudes -0.2 to 2.5.
Earthquake activity in the Yellowstone region is at relatively low background levels.
Ground Deformation Summary: Through July 2008, continuous GPS data show that most of the Yellowstone caldera continued moving upward, though at a lower rate than the past several years. The maximum measured ground uplift over the past 48 months is ~20 cm at the White Lake GPS station. An example can be found at: http://pboweb.unavco.org/shared/scripts/stations/?checkkey=WLWY&sec=timeseries_plots×eries=raw
The general uplift of the Yellowstone caldera is scientifically interesting and will continue to be monitored closely by YVO staff.
An article on the current uplift episode at Yellowstone and discussion of long-term ground deformation at Yellowstone and elsewhere can be found at: http://volcanoes.usgs.gov/yvo/2007/upsanddowns.html
-----
The Yellowstone Volcano Observatory (YVO) is a partnership of the U.S. Geological Survey (USGS), Yellowstone National Park, and University of Utah to strengthen the long-term monitoring of volcanic and earthquake unrest in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.
Tuesday, July 1, 2008 12:10 MDT (Tuesday, July 1, 2008 18:10 UTC)
YELLOWSTONE VOLCANO (CAVW#1205-01-)
44.43°N 110.67°W, Summit Elevation 9203 ft (2805 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
JUNE 2008 Yellowstone Seismicity Summary
During the month of June 2008, 79 earthquakes were located in the Yellowstone region. The largest event was a magnitude 2.7 on June 4 at 9:02 PM MDT, located about 6 miles southwest of West Thumb, WY. There was a swarm of 27 events, June 4-8, with magnitudes 0.8 to 2.7, located about 6 miles southwest of West Yellowstone, MT.
Earthquake activity in the Yellowstone region is at relatively low background levels.
Ground Deformation Summary: Through June 2008, continuous GPS data show that most of the Yellowstone caldera continued moving upward, though at a lower rate than the past several years. The maximum measured ground uplift over the past 48 months is ~20 cm at the White Lake GPS station. An example can be found at: http://pboweb.unavco.org/shared/scripts/stations/?checkkey=WLWY&sec=timeseries_plots×eries=raw
The general uplift of the Yellowstone caldera is scientifically interesting and will continue to be monitored closely by YVO staff.
An article on the current uplift episode at Yellowstone and discussion of long-term ground deformation at Yellowstone and elsewhere can be found at: http://volcanoes.usgs.gov/yvo/2007/upsanddowns.html
-----
The Yellowstone Volcano Observatory (YVO) is a partnership of the U.S. Geological Survey (USGS), Yellowstone National Park, and University of Utah to strengthen the long-term monitoring of volcanic and earthquake unrest in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.
Tuesday, June 3, 2008 11:38 MDT (Tuesday, June 3, 2008 17:38 UTC)
YELLOWSTONE VOLCANO (CAVW#1205-01-)
44.43°N 110.67°W, Summit Elevation 9203 ft (2805 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
MAY 2008 Yellowstone Seismicity Summary
During the month of May 2008, 99 earthquakes were located in the Yellowstone region. The largest event was a magnitude 2.3 on May 18 at 2:44 AM MST, located about 7 miles north of Fishing Bridge, WY. There was a swarm of 37 events, May 4-14, with magnitudes from -0.6 to 1.8, located anout 7 miles north of West Yellowstone, MT.
Earthquake activity in the Yellowstone region is at normal background levels.
Ground Deformation Summary: Through May 2008, continuous GPS data show that most of the Yellowstone caldera continued moving upward, though at a lower rate than the past several years. The maximum measured ground uplift over the past 40 months is ~20 cm at the White Lake GPS station. An example can be found at: http://pboweb.unavco.org/shared/scripts/stations/?checkkey=WLWY&sec=timeseries_plots×eries=raw
The general uplift of the Yellowstone caldera is scientifically interesting and will continue to be monitored closely by YVO staff.
An article on the current uplift episode at Yellowstone and discussion of long-term ground deformation at Yellowstone and elsewhere can be found at: http://volcanoes.usgs.gov/yvo/2007/upsanddowns.html
-----
The Yellowstone Volcano Observatory (YVO) is a partnership of the U.S. Geological Survey (USGS), Yellowstone National Park, and University of Utah to strengthen the long-term monitoring of volcanic and earthquake unrest in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.
Friday, May 2, 2008 15:38 MDT (Friday, May 2, 2008 21:38 UTC)
YELLOWSTONE VOLCANO (CAVW#1205-01-)
44.43°N 110.67°W, Summit Elevation 9203 ft (2805 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
APRIL 2008 Yellowstone Seismicity Summary
During the month of April 2008, 70 earthquakes were located in the Yellowstone Region. The largest of these shocks was a magnitude 1.7 event on April 17, 2008 at 6:56 AM MST, located about 13 miles North Northwest of Pahaska Tepee, WY and 19 miles North East of Fishing Bridge, WY. This earthquake was not felt. There were no earthquake swarms. Earthquake activity in the Yellowstone region is at relatively low background levels.
Earthquake activity in the Yellowstone region is at normal background levels.
Ground Deformation Summary: Through April 2008, continuous GPS data show that most of the Yellowstone caldera continued moving upward at similar to slightly lower rates as the past year. The maximum measured ground uplift over the past 40 months is ~20 cm at the White Lake GPS station. An example can be found at: http://pboweb.unavco.org/shared/scripts/stations/?checkkey=WLWY&sec=timeseries_plots×eries=raw
The general uplift of the Yellowstone caldera is scientifically interesting and will continue to be monitored closely by YVO staff.
An article on the current uplift episode at Yellowstone and discussion of long-term ground deformation at Yellowstone and elsewhere can be found at: http://volcanoes.usgs.gov/yvo/2007/upsanddowns.html
-----
The Yellowstone Volcano Observatory (YVO) is a partnership of the U.S. Geological Survey (USGS), Yellowstone National Park, and University of Utah to strengthen the long-term monitoring of volcanic and earthquake unrest in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.
Tuesday, April 1, 2008 16:18 MDT (Tuesday, April 1, 2008 22:18 UTC)
YELLOWSTONE VOLCANO (CAVW#1205-01-)
44.43°N 110.67°W, Summit Elevation 9203 ft (2805 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
MARCH 2008 Yellowstone Seismicity Summary
During March 2008, 147 earthquakes were located in the Yellowstone National Park area. The largest of these shocks was a magnitude 4.2 on March 25, 2008 at 05:59 AM (MDT) located about 19 miles NE of Fishing Bridge, WY, and near the east boundary of the park. The shock was felt in Yellowstone National Park, Cody WY and surrounding areas of Wyoming and Montana. The mainshock was followed by three aftershocks of magnitudes 1.0 to 2.4. Also, an earthquake swarm occurred March 11 to 16th about 5 miles north northwest of Old Faithful, YNP. This sequence had 73 events ranging from magnitude 0.0 to 2.6. An additional earthquake swarm was located about 2 miles southeast of West Yellowstone, Montana on March 21 to 22nd. This sequence had 17 events ranging from magnitude -0.9 to 1.5.
Earthquake activity in the Yellowstone region is at normal background levels.
Ground Deformation Summary: Through March 2008, continuous GPS data show that most of the Yellowstone caldera continued moving upward at similar to slightly lower rates as the past year. The maximum measured ground uplift over the past 40 months is ~19 cm at the White Lake GPS station. An example can be found at: http://pboweb.unavco.org/shared/scripts/stations/?checkkey=WLWY&sec=timeseries_plots×eries=raw
The general uplift of the Yellowstone caldera is scientifically interesting and will continue to be monitored closely by YVO staff.
An article on the current uplift episode at Yellowstone and discussion of long-term ground deformation at Yellowstone and elsewhere can be found at: http://volcanoes.usgs.gov/yvo/2007/upsanddowns.html
-----
The Yellowstone Volcano Observatory (YVO) is a partnership of the U.S. Geological Survey (USGS), Yellowstone National Park, and University of Utah to strengthen the long-term monitoring of volcanic and earthquake unrest in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.
Tuesday, March 25, 2008 11:16 MDT (Tuesday, March 25, 2008 17:16 UTC)
YELLOWSTONE VOLCANO (CAVW#1205-01-)
44.43°N 110.67°W, Summit Elevation 9203 ft (2805 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
University of Utah PRESS RELEASE
The University of Utah Seismograph Stations reports that a light earthquake of magnitude 4.10 occurred at 05:59 AM on March 25, 2008 (MDT) in Yellowstone National Park. The epicenter of the shock was located 29.8 km (18.6 mi) NE of Fishing Bridge, WY. Two earthquakes of magnitude 3.0 or greater have occurred within 25 km of the epicenter of this event since 1962. The largest of these events was a magnitude 3.53 on July 20, 1992, 6.4 km (4.0 mi) NE of Fishing Bridge, WY. No earthquakes of magnitude 4.5 or greater have occurred within 50 km of the epicenter of this event since 1962. This event has been reported felt in Pahaska Tepee, outside the east entrance to Yellowstone National Park and in southwest Montana as well as in western Wyoming.
The location of the earthquake has been analyzed by a seismologist.
Persons who felt the earthquake are encouraged to fill out a survey form on the USGS Community Felt reports web site: http://pasadena.wr.usgs.gov/shake/STORE/X13060_08/ciim_display.html.
Information on the earthquake can be viewed at the University of Utah Seismograph Stations: http://www.seis.utah.edu/.
Recordings from a nearby Yellowstone seismograph station can be viewed online at:
http://www.quake.utah.edu/helicorder/heli/yellowstone/index.html.
-----
The Yellowstone Volcano Observatory (YVO) is a partnership of the U.S. Geological Survey (USGS), Yellowstone National Park, and University of Utah to strengthen the long-term monitoring of volcanic and earthquake unrest in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.
MONTHLY UPDATE
Monday, March 3, 2008 10:43 MST (Monday, March 3, 2008 17:43 UTC)
YELLOWSTONE VOLCANO (CAVW#1205-01-)
44.43°N 110.67°W, Summit Elevation 9203 ft (2805 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
February 2008 Yellowstone Activity Summary
Earthquake activity in the Yellowstone region is within background levels and GPS data show continued uplift in the current inflation cycle.
During the month of February 2008, 130 earthquakes were located in the Yellowstone region. The largest of these shocks was a magnitude 2.4 on February 3, 2008 at 1:38 PM MST, that was located about 5 miles southwest of Madison Junction, YNP. A swarm occurred February 3, 2008 that was located about 6 miles west northwest of Norris Junction, YNP. This sequence had 47 events ranging from magnitude -0.2 to 2.0.
Earthquake activity in the Yellowstone region is at normal background levels.
Ground Deformation Summary: Through February 2008, continuous GPS data show that most of the Yellowstone caldera continued moving upward at similar to slightly lower rates as the past year. The maximum measured ground uplift over the past 39 months is ~19 cm at the White Lake GPS station. An example can be found at: http://pboweb.unavco.org/shared/scripts/stations/?checkkey=WLWY&sec=timeseries_plots×eries=raw
The general uplift of the Yellowstone caldera is scientifically interesting and will continue to be monitored closely by YVO staff.
An article on the current uplift episode at Yellowstone and discussion of long-term ground deformation at Yellowstone and elsewhere can be found at: http://volcanoes.usgs.gov/yvo/2007/upsanddowns.html
Friday, February 1, 2008 15:13 MST (Friday, February 1, 2008 22:13 UTC)
YELLOWSTONE VOLCANO (CAVW#1205-01-)
44.43°N 110.67°W, Summit Elevation 9203 ft (2805 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
January 2008 Yellowstone Activity Summary
Earthquake activity in the Yellowstone region is within background levels and GPS data show continued uplift in the current inflation cycle.
Earthquake Summary: During the month of January 2008, 263 earthquakes were located
in the Yellowstone region. These events were part of three clusters of earthquake activity, a common mode of occurrence for Yellowstone, and were an extension of an earthquake swarm that began on Dec. 29, 2007. The largest shock was a magnitude 3.7 on January 9, 2008 at 2:37 PM MST, which was located within a swarm of smaller earthquakes located about 10 miles northwest of Madison Junction, YNP, and 11 miles northeast of West Yellowstone, MT, The shock was felt by persons in Yellowstone National Park, West Yellowstone MT, and in other areas of western Montana. The principal shock was followed by 123 later shocks of magnitude -0.8 to 2.9. An additional swarm occurred January 25 to 26 that was located about 4 miles north of Old Faithful, YNP. This sequence had 32 events ranging from magnitude 0.7 to 2.4.
Ground Deformation Summary: Through January 2008, continuous GPS data show that most of the Yellowstone caldera continued moving upward at similar to slightly lower rates as the past year. The maximum measured ground uplift over the past 38 months is ~18 cm at the White Lake GPS station. An example can be found at: http://pboweb.unavco.org/shared/scripts/stations/?checkkey=WLWY&sec=timeseries_plots×eries=raw
The general uplift of the Yellowstone caldera is scientifically interesting and will continue to be monitored closely by YVO staff.
An article on the current uplift episode at Yellowstone and discussion of long-term ground deformation at Yellowstone and elsewhere can be found at: http://volcanoes.usgs.gov/yvo/2007/upsanddowns.html
-----
The Yellowstone Volcano Observatory (YVO) is a partnership of the U.S. Geological Survey (USGS), Yellowstone National Park, and University of Utah to strengthen the long-term monitoring of volcanic and earthquake unrest in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.
Thursday, January 3, 2008 11:59 MST (Thursday, January 3, 2008 18:59 UTC)
YELLOWSTONE VOLCANO (CAVW#1205-01-)
44.43°N 110.67°W, Summit Elevation 9203 ft (2805 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
December 2007 Yellowstone Activity Summary
Earthquake activity in the Yellowstone region is within background levels and GPS data show continued uplift in the current inflation cycle.
Earthquake Summary: During the month of December 2007, 184 earthquakes were located in the Yellowstone region. The largest of these shocks was a magnitude 3.6 on December 30, 2007 at 8:29 PM MST, located about 11 miles north of Madison Junction, YNP, and 11 miles northeast of West Yellowstone, MT. The shock was felt in Yellowstone National Park, West Yellowstone MT, and in other areas of western Montana. The main shock was followed by 39 aftershocks of magnitude -0.5 to 2.4. An additional earthquake swarm occurred December 18 to 21 that was located about 7 miles northwest of West Yellowstone, MT. This sequence had 48 events ranging from magnitude -0.1 to 2.4.
Ground Deformation Summary: Through December 2007, continuous GPS data show that most of the Yellowstone caldera continued moving upward at similar to slightly lower rates as the past year. The maximum measured ground uplift over the past 37 months is ~18 cm at the White Lake GPS station. An example can be found
at: http://pboweb.unavco.org/shared/scripts/stations/?checkkey=WLWY&sec=timeseries_plots×eries=raw
The general uplift of the Yellowstone caldera is scientifically interesting and will continue to be monitored closely by YVO staff.
An article on the current uplift episode at Yellowstone and discussion of long-term ground deformation at Yellowstone and elsewhere can be found at: http://volcanoes.usgs.gov/yvo/2007/upsanddowns.html
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The Yellowstone Volcano Observatory (YVO) is a partnership of the U.S. Geological Survey (USGS), Yellowstone National Park, and University of Utah to strengthen the long-term monitoring of volcanic and earthquake unrest in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.
Real-time Monitoring Information is available on the YVO Monitoring pages
For more information about the Volcano Alert Level and Aviation Color Code, please see the USGS Volcanic Activity Alert-Notification System web page.
