Informasi dari USGS:

Mainshock: Friday, March 11, 2011 at 02:46:23 PM at epicenter

http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/usc0001xgp.php

Getaran terasa sekitar 15-20 menit

Magnitude 8.9
Date-Time
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 (80 miles) E of Sendai, Honshu, Japan
178 km (110 miles) E of Yamagata, Honshu, Japan
178 km (110 miles) ENE of Fukushima, Honshu, Japan
373 km (231 miles) NE of 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
  • USGS NEIC (WDCS-D)
Event ID usc0001xgp
 

Gempa1: M8.8 (star), Shaking Map USGS

Gempa1: M8.8 (star), Shaking Map USGS

Shaking Map, USGS

Shaking Map, USGS

Gempa kedua: Magnitude 6.8. Friday, March 11, 2011 at 03:15:40 PM at epicenter

http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/usc0001xhz.php

Yang ini yang terasa sekali komponen P dan S wave-nya.

Magnitude 6.8
Date-Time
Location 36.186°N, 141.192°E
Depth 35 km (21.7 miles) set by location program

Gempa2, M6.8, intensity map, USGS

Gempa2, M6.8, intensity map, USGS

Gempa besar ketiga: Magnitude 7.1, Friday, March 11, 2011 at 04:25:50 PM at epicenter

http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/usc0001xig.php#details

Magnitude 7.1
Date-Time
Location 38.106°N, 144.553°E
Depth 19.7 km (12.2 miles)
Region OFF THE EAST COAST OF HONSHU, JAPAN 

 

Gempa3, Mw 7.1, Intensity map USGS

Gempa3, Mw 7.1, Intensity map USGS

Gempa besar ke-..: Mw 6.2, Saturday, March 12, 2011 at 03:59:15 AM at epicenter,

Getarannya tiba di kawashinoha, Tokyo, pukul 4:03 dini hari, cukup kencang dan berdurasi sekitar 1-2 menit.

Kali ini epicenternya di pantai barat.

Magnitude 6.2
Date-Time
Location 37.037°N, 138.355°E
Depth 10 km (6.2 miles)
Region NEAR THE WEST COAST OF HONSHU, JAPAN
Gempa subuh: M6.2, shake map USGS

Gempa subuh: M6.2, shake map USGS

Aftershocks:

Aftershocks from JMA, until 22:30

Aftershocks from JMA, until 22:30

Aftershocks from USGS, ~until 6 am tokyo time.

Aftershocks from USGS, ~until 6 am tokyo time.

Rupture length so far: approximated 600 km.

TSUNAMI height:

Oberserved Tsunami Height in Tide Gauge:

http://www.jishin.go.jp/main/chousa/11mar_sanriku-oki/p03.jpg