Magnitude 4.9 TONGA REGION
Saturday, March 21, 2009 at 01:27:57 UTC
Preliminary Earthquake Report
| Magnitude | 4.9 |
|---|---|
| Date-Time |
Time of Earthquake in other Time Zones |
| Location | 23.66S 175.30W |
| Depth | 35.0 kilometers |
| Region | TONGA REGION |
| Distances |
280 km (175 miles) S of NUKU'ALOFA, Tonga 485 km (300 miles) SE of Ndoi Island, Fiji 570 km (355 miles) SSW of Neiafu, Tonga 1740 km (1080 miles) NE of Auckland, New Zealand |
| Location Uncertainty | Error estimate: horizontal +/- 13.2 km; depth fixed by location program |
| Parameters | Nst=54, Nph=54, Dmin=952.3 km, Rmss=0.80 sec, Erho=13.2 km, Erzz=0 km, Gp=79.2 degrees |
| Source | USGS NEIC (WDCS-D) |
| Event ID | uselac |
|
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Theoretical P-Wave Travel Times
Earthquakes: Frequently Asked Questions
|
The earthquake locations and magnitudes cited in these NOAA tsunami bulletins are very preliminary and may be superceded by USGS locations and magnitudes computed using more extensive data sets. |
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
