Magnitude 4.7 TONGA REGION
Sunday, April 19, 2009 at 23:15:48 UTC
Preliminary Earthquake Report
| Magnitude | 4.7 |
|---|---|
| Date-Time |
Time of Earthquake in other Time Zones |
| Location | 23.32S 174.77W |
| Depth | 74 kilometers |
| Region | TONGA REGION |
| Distances |
245 km (150 miles) S of NUKU'ALOFA, Tonga 500 km (310 miles) SE of Ndoi Island, Fiji 525 km (325 miles) S of Neiafu, Tonga 1800 km (1120 miles) NE of Auckland, New Zealand |
| Location Uncertainty | Error estimate: horizontal +/- 9.9 km; depth +/- 15.1 km |
| Parameters | Nst=57, Nph=57, Dmin=970.1 km, Rmss=0.92 sec, Erho=9.9 km, Erzz=15.1 km, Gp=73.8 degrees |
| Source | USGS NEIC (WDCS-D) |
| Event ID | usfqb6 |
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Earthquakes: Frequently Asked Questions
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NB:
The official magnitude for this earthquake is indicated at the top of this page.
This was the best available estimate of the earthquake's size,
at the time that this page was created. Other magnitudes associated
with web pages linked from here are those determined at various times
following the earthquake with different types of seismic data.
Although, given the data used, they are legitimate estimates of magnitude
they are not considered the official magnitude.
The region name is an automatically generated name
from the Flinn-Engdahl (F-E) seismic and geographical regionalization scheme.
The boundaries of
these regions are defined at one-degree intervals and therefore differ from
irregular political boundaries.
More->
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
