Maui News

Tsunami Watch in effect for Hawaii following 8.9 Japan Quake

March 10, 2011, 8:07 PM HST
* Updated March 10, 9:14 PM
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By Wendy Osher

Image courtesy USGS.

(Update: 8:00 p.m. 3/10/11)

The Pacific Tsunami Warning Center has issued a Tsunami WATCH for Hawaii following a 8.9 earthquake off the North East coast of Honshu, Japan. The quake occurred at 7:46 p.m. Hawaii Standard time (Thursday, March 10, 2011).

Based on all available data, a tsunami may have been generated by this earthquake that could be destructive on coastal areas even far form the epicenter. An investigation is underway to determine if there is a tsunami threat to Hawaii.

If tsunami waves impact Hawaii, the estimated earliest arrival of the first tsunami wave is 2:59 a.m. Hawaii Standard Time on Friday March 11, 2011. Messages will be issued hourly or sooner as conditions warrant.

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Additional Quakes have also hit since the initial 8.9 tremor:

MAG UTC DATE-TIME
y/m/d h:m:s
LAT
deg
LON
deg
DEPTH
km
Region
MAP 7.1 2011/03/11 06:25:51 38.074 144.559 26.5 OFF THE EAST COAST OF HONSHU, JAPAN
MAP 6.8 2011/03/11 06:15:46 36.126 140.234 30.2 NEAR THE EAST COAST OF HONSHU, JAPAN
MAP 6.4 2011/03/11 06:07:22 36.401 141.862 35.4 NEAR THE EAST COAST OF HONSHU, JAPAN
MAP 6.4 2011/03/11 06:06:11 39.025 142.316 25.1 NEAR THE EAST COAST OF HONSHU, JAPAN
MAP 8.9 2011/03/11 05:46:24 38.322 142.369 24.4 NEAR THE EAST COAST OF HONSHU, JAPAN
Magnitude 8.9
Date-Time
  • Friday, March 11, 2011 at 05:46:23 UTC
  • Friday, March 11, 2011 at 02:46:23 PM at epicenter
Location 38.322°N, 142.369°E
Depth 24.4 km (15.2 miles) set by location program
Region NEAR THE EAST COAST OF HONSHU, JAPAN
Distances
  • 130 km (81 miles) E (86°) from Sendai, Honshu, Japan
  • 179 km (111 miles) ENE (68°) from Fukushima, Honshu, Japan
  • 188 km (117 miles) SE (145°) from Morioka, Honshu, Japan
  • 376 km (234 miles) NE (37°) from TOKYO, Japan
Location Uncertainty horizontal +/- 13.5 km (8.4 miles); depth fixed by location program
Parameters NST=350, Nph=351, Dmin=416.3 km, Rmss=1.46 sec, Gp= 29°,
M-type=”moment” magnitude from initial P wave (tsuboi method) (Mi/Mwp), Version=A
Source
Event ID usc0001xgp

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