Archived Volcanic Events of Interest

The following volcanic activity warranted a special update.

Times are local to the volcano and in military format.
Alert levels & aviation color codes defined at http://volcanoes.usgs.gov/activity/alertsystem.

Redoubt Alert Level=WATCH. Aviation Color Code=ORANGE. Issued May 5, 2009 06:59 ADT
Activity continues to increase. An explosive event is likely, though not certain, in the coming days.
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Redoubt Alert Level=WATCH. Aviation Color Code=ORANGE. Issued May 2, 2009 09:48 ADT
Eruption continues. Lava dome growing slowly. Volcano obscured by clouds in satellite and web camera images.
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Cleveland Alert Level=UNASSIGNED. Aviation Color Code=UNASSIGNED. Issued May 1, 2009 08:31 ADT
No activity reported since late January.
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Pagan Alert Level=UNASSIGNED. Aviation Color Code=UNASSIGNED. Issued Apr 28, 2009 14:39 ChST
Steaming at Pagan volcano has diminished and therefore the aviation color code and alert level is being lowered to unassigned.
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Pagan Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Apr 16, 2009 04:38 ChST
ALERT LEVEL CHANGE TO ADVISORY/YELLOW. Intermittent puffs of steam and possibly ash reported moving west to west northwest.
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Redoubt Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Apr 11, 2009 12:53 ADT
Eruption continues. Lava dome growing. Steam plume possibly with small amounts of ash.
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Redoubt Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Apr 6, 2009 14:55 ADT
Eruption continues. Lava dome growing in summit crater. Steam plume probably to 15,000 feet. Possibility of sudden explosions, ash clouds, ash fall, and mudflows.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Apr 4, 2009 06:51 ADT
Another explosive event underway. Ash cloud to 50,000 feet and drifting southeast. Lahars in Drift River Valley.
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Redoubt Alert Level=WATCH. Aviation Color Code=RED. Issued Apr 4, 2009 06:35 ADT

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Redoubt Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Apr 3, 2009 11:44 ADT
Eruption continues. Steam, gas, and minor ash emission is continuous, typically below 15,000 ft but as high as 25,000 ft at times. Lava dome growth continues.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 30, 2009 10:12 ADT
Explosive activity at Mt. Redoubt continues with eruption clouds occasionally extending above 20,000 ft. above sea level.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 30, 2009 05:14 ADT
Explosive activity at Mt. Redoubt continues with eruption clouds occasionally extending above 20,000 ft. above sea level.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 29, 2009 23:35 ADT
Explosive activity at Mt. Redoubt continues with eruption clouds extending above 20,000 ft. above sea level.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 28, 2009 19:36 ADT
Explosive activity at Mt. Redoubt continues with eruption clouds extending above 45,000 ft. above sea level.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 28, 2009 15:43 ADT
Explosive activity at Mt. Redoubt continues with eruption clouds extending above 35,000 ft. above sea level.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 28, 2009 13:58 ADT
Explosive activity at Mt. Redoubt continues with eruption clouds extending as high as 25,000 ft. above sea level.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 28, 2009 01:29 ADT
Explosive activity at Mt. Redoubt continues with eruption clouds extending as high as 50,000 ft. above sea level.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 27, 2009 23:54 ADT
An eruption of Redoubt volcano occurred at 23:20 AKDT (07:20 UTC). National Weather Service reports an ash cloud height to 40,000 feet above sea level.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 27, 2009 23:29 ADT
An eruption of Redoubt volcano occurred at 23:20 AKDT (07:20 UTC). National Weather Service reports an ash cloud height to 40,000 feet above sea level.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 27, 2009 19:34 ADT
An eruption of Redoubt volcano occurred at 19:25 AKDT (03:25 UTC). National Weather Service reports an ash cloud height to 51,000 feet above sea level.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 27, 2009 17:49 ADT
An eruption of Redoubt volcano occurred at 17:35 AKDT (1:35 UTC). National Weather Service reports an ash cloud height to 40,000 feet above sea level.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 27, 2009 08:51 ADT
An eruption at Redoubt at 08:40 AKDT. Preliminary cloud heights are reported to about 50,000 ft. above sea level.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 27, 2009 00:00 ADT
An eruption at Redoubt at 23:48 AKDT. Preliminary cloud heights are reported to at least 32,000 ft. above sea level.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 26, 2009 09:42 ADT
A large eruption at Redoubt began at 09:24 AKDT. Cloud heights are reported to at least 65,000 ft. above sea level.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 26, 2009 08:56 ADT
Explosive event began roughly 08:34. Reported cloud heights to 30, 000 ft above sea level.
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Redoubt Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Mar 25, 2009 13:35 ADT
No explosions in last 36 hours and seismicity has declined. Possible lava dome growth at the summit. Explosions could resume without much warning.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 25, 2009 05:53 ADT
Small explosion at 05:12 AKDT, 1312 UTC, cloud height at 15,000 ft above sea level.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 23, 2009 20:14 ADT
A significant explosive event at Redoubt began at 0341 UTC (7:41 pm local). The top of the volcanic cloud is in excess of 50,000 ft above sea level.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 23, 2009 12:18 ADT
An eruption of Mt. Redoubt, AK, began at approximately 22:38 AKDT, March 22, 2009 (0638 UTC). Eruption cloud height estimated at 50,000 ft above sea level.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 22, 2009 23:26 ADT
An eruption of Mt. Redoubt, AK, began at approximately 22:38 AKDT, March 22, 2009 (0638 UTC). Eruption cloud height estimated at 50,000 ft above sea level.
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Redoubt Alert Level=WARNING. Aviation Color Code=RED. Issued Mar 22, 2009 22:56 ADT
An eruption of Mt. Redoubt, AK, began at approximately 22:38 AKDT, March 22, 2009 (0638 UTC).
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Redoubt Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Mar 21, 2009 22:09 ADT
Likelihood of eruption has increased.
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Redoubt Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Mar 21, 2009 08:50 ADT
Shallow earthquake activity under the volcano that began yesterday continues.
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Sanford Alert Level=UNASSIGNED. Aviation Color Code=UNASSIGNED. Issued Mar 20, 2009 11:06 ADT
Orographic cloud streaming from Sanford causes a flurry of calls from locals.
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Okmok Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Mar 20, 2009 11:01 ADT
Decreased seismic activity. No eruptive activity observed.
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Lassen Volcanic Center Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Mar 19, 2009 07:29 PDT
Information Statement for the recent March 17-19, 2009, Lassen Peak swarm activity
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Redoubt Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Mar 18, 2009 09:41 ADT
It does not appear at this time that a significant eruption is likely in the short term, but conditions may evolve rapidly.
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Redoubt Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Mar 16, 2009 14:40 ADT
Color code and alert levels to orange/watch. Minor ash emission on upper south flank of volcano.
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Redoubt Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Mar 15, 2009 14:50 ADT
Color code and alert levels to orange/watch. Minor ash emission on upper flanks of volcano.
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Redoubt Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Mar 12, 2009 10:23 ADT
Color code and alert levels yellow and advisory. Information Statement gives details about current level of unrest.
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Redoubt Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Mar 10, 2009 09:56 ADT
Color code and alert levels lowered to yellow and advisory at Mt. Reodubt. Likelihood of an eruption within days is diminished.
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Okmok Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Mar 2, 2009 20:52 ADT
Increased seismic activity. No eruptive activity observed.
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Redoubt Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Feb 13, 2009 10:12 ADT
Seismic activity remains elevated. Likelihood of an eruption remains.
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Shishaldin Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Feb 11, 2009 16:11 ADT
volcano at background levels
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Redoubt Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Jan 30, 2009 07:16 ADT
Seismic activity has increased. Likelihood of an eruption, perhaps within days, increased.
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Redoubt Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Jan 29, 2009 13:53 ADT
Seismic activity has increased. Likelihood of an eruption, perhaps within days, increased.
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Redoubt Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Jan 28, 2009 16:19 ADT
Seismic activity has increased. Likelihood of an eruption, perhaps within days increased.
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Redoubt Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Jan 25, 2009 16:28 ADT
Seismic activity has increased. Likelihood of an eruption, perhaps within days increased.
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Redoubt Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Jan 25, 2009 06:57 ADT
Seismic activity has increased. Likelihood of an eruption, perhaps within days increased.
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Redoubt Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Jan 25, 2009 02:09 ADT
Seismic activity has increased. Likelihood of an eruption, perhaps within days increased.
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Yellowstone Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Jan 9, 2009 07:44 MST
Small Earthquake Swarm on 9 January 2009 near northeast corner of Yellowstone Caldera
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Shishaldin Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Jan 6, 2009 15:28 ADT
Increased potential for eruption.
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Yellowstone Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Jan 6, 2009 00:39 MST
Yellowstone Lake Earthquake Swarm Summary through 5 January 2009, seismic activity has markedly decreased.
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Cleveland Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Jan 2, 2009 12:51 ADT
Short-lived ash emission to about 20,000 feet. Appears to have rapidly dispersed over the ocean E-SE of the volcano.
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Yellowstone Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Jan 2, 2009 07:30 MST
Yellowstone Lake Earthquake Swarm Update: 2 January 2008
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Yellowstone Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Dec 29, 2008 07:07 MST
The swarm of earthquakes that started on December 26 beneath Yellowstone Lake in Yellowstone National Park continues.
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Yellowstone Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Dec 27, 2008 08:29 MST
A swarm of small earthquakes of magnitude 3.5 and smaller is occurring beneath Yellowstone Lake in Yellowstone National Park.
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Cleveland Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Dec 24, 2008 13:22 ADT
The aviation color code is raised to Yellow and the alert level to Advisory for Cleveland volcano based on a persistent thermal anomaly seen in satelite data.
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Okmok Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Nov 19, 2008 09:54 ADT
No activity observed.
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Redoubt Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Nov 5, 2008 14:52 ADT
Alert level increase to Advisory/Yellow. AVO has detected potentially significant changes in gas and heat output from Redoubt Volcano.
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Kasatochi Alert Level=UNASSIGNED. Aviation Color Code=UNASSIGNED. Issued Oct 30, 2008 15:41 ADT
Alert level decrease to Unassigned/Unassigned. No new activity observed.
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Cleveland Alert Level=UNASSIGNED. Aviation Color Code=UNASSIGNED. Issued Oct 9, 2008 12:59 ADT
Alert level decrease to Unassigned/Unassigned. The level of volcanic activity has declined significantly over the past month. Because Cleveland is not monitored with real-time seismic instrumentation, the absence of unrest cannot be confirmed.
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Redoubt Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Oct 3, 2008 15:42 ADT
Weak but anomalous volcanic seismicity has been detected at Redoubt.
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Redoubt Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Oct 3, 2008 10:37 ADT
A recent overflight of Redoubt Volcano showed increased fumarolic activity and small glacial disruptions.
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Anatahan Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Oct 1, 2008 08:31 MPT
Alert level decrease to Normal/Green. Seismicity remains low and no recent reports of significant plumes.
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Kilauea Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Sep 5, 2008 15:26 HST
Sloshing lava lake viewed within Halema`uma`u vent from helicopter
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Kasatochi Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Sep 4, 2008 14:26 ADT
Seismic activity continues.
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Okmok Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Aug 27, 2008 13:53 ADT
Seismicity at Okmok has been declining for 8 days. AVO is lowering the aviation color code from Orange to Yellow and the Alert Level from Watch to Advisory.
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Cleveland Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Aug 25, 2008 14:51 ADT
No recent thermal anomalies observed.
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Kasatochi Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Aug 12, 2008 13:29 ADT
Volcanic ash from Kasatochi is expected to move over southeast Alaska at high altitudes. No ashfall on the ground is expected.
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Anatahan Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Aug 12, 2008 09:43 MPT
Aviation color code lowered from Orange to Yellow. Low-level steaming and occasional SO2 emissions likely.
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Cleveland Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Aug 11, 2008 13:52 ADT
Cleveland continues to erupt lava. No indication of ash plumes.
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Kasatochi Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Aug 9, 2008 22:04 ADT
Seismic activity at Kasatochi can no longer be detected on nearby stations. No ash observed in satellite data and observations by passing boats indicate activity has declined.
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Kasatochi Alert Level=WARNING. Aviation Color Code=RED. Issued Aug 9, 2008 16:23 ADT
Seismic activity at Kasatochi can no longer be detected on nearby stations. AVO must rely on satellite and visual reports to monitor activity
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Kasatochi Alert Level=WARNING. Aviation Color Code=RED. Issued Aug 7, 2008 15:26 ADT
Eruption in progress. Large earthquakes and volcanic tremor are occurring in the vicinity of Kasatochi Volcano. Kasatochi is an unmonitored volcano with no seismic network.
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Kasatochi Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Aug 7, 2008 13:57 ADT
Large earthquakes and volcanic tremor are occurring in the vicinity of Kasatochi Volcano. Potential for eruptive activity has increased. Kasatochi is an unmonitored volcano with no seismic network.
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Kasatochi Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Aug 6, 2008 19:17 ADT
Rapid increase in earthquake activity in the vicinity of Kasatochi Volcano. Potential for eruptive activity. Kasatochi is an unmonitored volcano with no seismic network.
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Cleveland Alert Level=WATCH. Aviation Color Code=YELLOW. Issued Aug 6, 2008 11:16 ADT
Volcanic unrest at Cleveland Volcano appears to have declined. No significant ash emissions have occurred since July 29.
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Okmok Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Aug 2, 2008 15:35 ADT
Strong volcanic tremor at Okmok has declined although intermittent bursts of tremor are occurring intermittently.
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Okmok Alert Level=WARNING. Aviation Color Code=RED. Issued Aug 2, 2008 04:42 ADT
Strong volcanic tremor resumed at Okmok beginning at about 04:05 AKDT (12:05 UTC).
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Okmok Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Jul 30, 2008 10:34 ADT
Satellite images and pilot reports indicate the ash plume at Okmok is at altitudes between 15,000 and 20,000 ft. Color CODE is now ORANGE. Alert Code is now WATCH
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Okmok Alert Level=WARNING. Aviation Color Code=RED. Issued Jul 28, 2008 16:51 ADT
Satellite images indicate ash may have reached 35,000 ft in a plume heading E to SE from the volcano.
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Anatahan Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Jul 28, 2008 10:17 MPT
Seismic tremor continues to slowly increase; a 5000 ft high plume extending 40 nautical miles North was seen in satellite data today.
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Anatahan Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Jul 26, 2008 11:48 MPT
Seismic activity has been slowly increasing for the last week; a weak low-level plume was visible in satellite data.
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Okmok Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Jul 26, 2008 11:01 ADT
The intensity and duration of tremor from the eruption at Okmok has decreased over the last five hours.
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Okmok Alert Level=WARNING. Aviation Color Code=RED. Issued Jul 25, 2008 13:47 ADT
The intensity of eruption at Okmok has increased over the last hour.
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Mount St. Helens Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Jul 11, 2008 11:08 PDT
Volcanic Alert Level and Aviation Color Code lowered to Normal and Green. Earthquakes, volcanic gas emissions, and ground deformation are all at pre-eruptive background levels.
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Long Valley Volcanic Center Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Jun 28, 2008 08:16 PDT
M=4.3 earthquake at 7:44 AM located just south of Long Valley caldera produced perceptible shaking throughout the Mammoth Lakes area.
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Anatahan Alert Level=NORMAL. Aviation Color Code=GREEN. Issued May 20, 2008 09:57 MPT
The color code and alert level is being lowered to Green and Normal. Seismic activity has been low for over a month and no ash or gas plumes have been reported.
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Anatahan Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Mar 31, 2008 05:45 MPT
Eruptive activity likely ceased. Aviation Color Code and Volcano Alert Level lowered to Yellow and Advisory.
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Yellowstone Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Mar 25, 2008 11:16 MDT
A magnitude 4.10 earthquake occurred at 05:59 AM (MDT) in Yellowstone National Park.
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Kilauea Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Mar 24, 2008 02:43 HST
Eruption of small incandescent particles in Halema`uma`u Crater; summit sulfur dioxide emissions and seismic tremor levels remain elevated; lava continues to breakout at the surface and flow into the
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Kilauea Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Mar 19, 2008 02:28 HST
Explosive eruption in Halema`uma`u Crater, Kilauea Volcano, is first since 1924
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Anatahan Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Feb 5, 2008 09:01 MPT
Satellite images from February 3, 2008 show a diffuse ash plume extending west from the volcano for approximately 60 miles (100 km).
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Anatahan Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Jan 31, 2008 07:20 MPT
Over past week, increasing levels of volcanic tremor. Satellite data show lake within the east crater has disappeared.
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Anatahan Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Nov 29, 2007 09:54 MPT
Volcanic Alert Level and Aviation Color Code increased to Advisory and Yellow. Amplitude of volcanic tremor has increased. Episodes of more vigorous tremor and small explosions have occurred.
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Kilauea Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Nov 21, 2007 06:12 HST
Lava bypasses July 21 channel and erupts from channel flank.
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Anatahan Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Oct 12, 2007 09:21 MPT
Volcano Alert Level and Aviation Color Code lowered to Normal and Green. Seismic activity at Anatahan has been at or near background since October 1.
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Kilauea Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Sep 30, 2007 08:51 HST
The 7/21 eruption continued to supply an open lava channel that fed three `a`a flows.
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Kilauea Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Sep 29, 2007 08:34 HST
SO2 concentrations within Hawai`i Volcanoes National Park are over 2,000 ppb and have been deemed UNHEALTHY (greater than 500 ppb).
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Anatahan Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Sep 15, 2007 03:13 MPT

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Kilauea Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Aug 14, 2007 09:22 HST
Difficult to assess activity at the 7/21 fissure area or effect of magnitude-5.4 earthquake on eruption due to Hurricane Flossie.
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Kilauea Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Aug 13, 2007 09:48 HST
A magnitude-5.4 earthquake located beneath the south flank of Kilauea Volcano at 7:38 p.m. H.s.t. and was felt island-wide.
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Kilauea Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Jul 22, 2007 09:41 HST
The lower 7/21 fissure is still active; flows are ponding between Pu`u Halulu, Pu`u Kahauale`a, and Kupaianaha. 3-4 active ponds are submerging the fissures.
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Kilauea Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Jul 22, 2007 03:32 HST
7/21 eruption initial outbreak came from two sets of fissures. Several small ponds are still forming. Floor of Pu`u `O`o crater dropped a few tens of meters and adjacent lava ponds have drained.
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Kilauea Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Jul 21, 2007 08:14 HST
The eruption from fissures east of Pu`u `O`o continues; cracks extend from the east rim of the crater and lava emerges first about 150 m east.
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Kilauea Alert Level=WATCH. Aviation Color Code=ORANGE. Issued Jul 21, 2007 03:20 HST
For the first time since February 7, 1992, lava is erupting east of Pu`u `O`o crater from a set of f(...)
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Agrigan Alert Level=UNASSIGNED. Aviation Color Code=UNASSIGNED. Issued Jul 18, 2007 11:20 MPT
An earthquake (~M 3.3) was reported felt on Agrigan island. No sulfur smell or any other signs of volcanic activity were reported.
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Kilauea Alert Level=WATCH . Aviation Color Code=ORANGE. Issued Jul 2, 2007 20:09 HST
Lava returns to Pu`u `O`o crater. The crater is still filled with fume making the lava difficult to see.
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Kilauea Alert Level=WATCH . Aviation Color Code=ORANGE. Issued Jun 21, 2007 21:13 HST
Pu`u `O`o activity is paused. There is no active lava visible anywhere on the flow field.
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Kilauea Alert Level=WATCH . Aviation Color Code=ORANGE. Issued Jun 21, 2007 00:51 HST
Activity at Kilauea Volcano has not changed significantly at the summit or east rift zone since 6 a.m. The summit shows only slight inflation and tremor levels continue at a steady rate.
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Kilauea Alert Level=WATCH . Aviation Color Code=ORANGE. Issued Jun 20, 2007 20:27 HST
Activity at Kilauea Volcano has not changed significantly at the summit or east rift zone since 6 a.m. The summit shows only slight inflation and tremor levels continue to decrease.
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Kilauea Alert Level=WATCH . Aviation Color Code=ORANGE. Issued Jun 20, 2007 15:21 HST
Activity at Kilauea Volcano has not changed significantly at the summit or east rift zone since 6 a.m. The summit shows only slight inflation; the tremor levels continue to decrease.
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Long Valley Volcanic Center Alert Level=NORMAL . Aviation Color Code=GREEN . Issued Jun 20, 2007 15:05 PDT
Earthquake sequence south of Long Valley caldera. A magnitude M=3.6 earthquake was followed by a M=4.6 earthquake and multiple aftershocks through June 20. There is no evidence for increased earthquake activity or ground deformation within the caldera.
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Kilauea Alert Level=WATCH . Aviation Color Code=ORANGE. Issued Jun 20, 2007 09:45 HST
HVO scientists measured concentrations greater than 10 ppm in a broad area adjacent to Halema�uma�u crater.
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Kilauea Alert Level=WATCH . Aviation Color Code=ORANGE. Issued Jun 17, 2007 14:55 HST
An earthquake swarm started at 2:15 a.m., June 17, 2007 and by 2 p.m., about 230 earthquakes were located in the upper east rift zone. Fresh cracks have opened about 2 cm in the Chain of Craters road near the Mauna Ulu turnoff.
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Kilauea Alert Level=WATCH . Aviation Color Code=ORANGE. Issued Jun 17, 2007 07:50 HST
Ongoing swarm beneath the upper east rift zone of Kilauea early this morning. About 70 shallow earthquakes have occurred in 2 hours.
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Kilauea Alert Level=WATCH . Aviation Color Code=ORANGE. Issued Jun 17, 2007 07:50 HST
A swarm of earthquakes and rapid deflation started at 2:15 a.m. in the upper east rift zone near Mauna Ulu. The event is most likely an intrusion of magma.
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Kilauea Alert Level=WATCH . Aviation Color Code=ORANGE. Issued May 24, 2007 16:27 HST
A magnitude-4.7 earthquake was recorded at 9:13 a.. H.s.t. It was located beneath the upper east rift zone of Kilauea volcano followed by several aftershocks.
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Anatahan Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Apr 23, 2007 17:46 MPT
Seismometers on Anatahan recorded low levels of tremor until April 20 UTC when the levels increased and remained slightly elevated. This is not a significant change.
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Anatahan Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Mar 24, 2007 10:47 MPT
Seismometers on Anatahan recording low levels of tremor. OMI satellite data showed occasionally high(...)
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Anatahan Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Mar 19, 2007 18:10 MPT
Seismometers on Anatahan recording low levels of tremor. OMI satellite data showed occasionally high amounts of Sulfur dioxide over Anatahan. No confirmed ash eruptions have occurred since September 3, 2005.
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Anatahan Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Feb 18, 2007 11:35 MPT
Residents reported smells and hazy air Saturday afternoon on Saipan. Anatahan has been continuously emitting a weak gas and steam plume for many months that is occasionally blown towards Saipan.
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Pagan Alert Level=UNASSIGNED. Aviation Color Code=UNASSIGNED. Issued Dec 20, 2006 19:03 MPT
ALERT LEVEL CHANGE TO UNASSIGNED/UNASSIGNED. No ash eruptions reported since December 8.
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Anatahan Alert Level=NORMAL. Aviation Color Code=GREEN. Issued Dec 6, 2006 15:19 MPT
ALERT LEVEL CHANGE TO NORMAL/GREEN. Anatahan continues to emit a weak gas and steam plume.
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Pagan Alert Level=ADVISORY. Aviation Color Code=YELLOW. Issued Dec 5, 2006 17:15 HST
At 08:00 December 4 UTC, HVO and EMO personnel were advised by Pagan residents that ash fell on their camp.
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