IRIS - TOHOKU, JAPAN Earthquake

TOHOKU, JAPAN Earthquake - 2011 March 11

EARTHQUAKE PARAMETERS (from USGS)
-------------------------------
Magnitude : 9.0
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

Earthquake Details (USGS)

Depth : 24.4 km (15.2 miles)
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

General Information

M9.0 Near the East Coast of Honshu, Japan

A magnitude 9.0 earthquake has occurred near the east coast of Honshu, Japan, as a result of thrust faulting on or near the subduction zone interface plate boundary between the Pacific and North American plates. This earthquake generated a tsunami, and a tsunami warning was issued throughout the Pacific.

Teachable Moments (IRIS)

USGS Information:

M7.1 Japan Earthquake
2011 April 07 14:32:41 UTC

M9.0 Japan Earthquake

Educational Slides [ppt version]

USGS CoreCast Interview

PAGER

Data Links

Updated: 2011.07.25

Numerous websites have been developed that provide access to the extensive information resources related to this earthquake. The emphasis of this page is on seismological data, products and early results. In addition to direct links to data and materials available from IRIS programs, this page includes a compilation of preliminary research results from the seismological community.

We welcome any additional contributions that might be of interest to the research community. Please send URLs or graphics, along with a short description and appropriate acknowledgement to: JapanEQpage@iris.washington.edu

IRIS DMC Products and data for the M9.0 TOHOKU, JAPAN event

The IRIS DMC has the following event based products ready:

USArray Ground Motion Visualization:
http://www.iris.edu/spud/gmv/4841

Event Plot suite:
http://www.iris.edu/spud/eventplot/4839

Waveform data collected in near real-time is available for this event from the DMC’s Wilber system in addition to other request mechanisms. The Wilber page for this event data can be reached directly using this link:
http://www.iris.edu/cgi-bin/wilberII/wilberII_page3.pl?evname=20110311_054623.7.spyder

For more information on access to IRIS earthquake-oriented data, please refer to:
http://www.iris.edu/data/event/

Data from the IRIS DMC via WILBER

IRIS Education and Public Outreach Products

IRIS Education and Public Outreach and the University of Portland have established routine procedures to develop a set of "Teachable Moments" which provide a short summary of the latest major earthquake within a few hours to one day after an event. Prepared by seismologists and educators, "Teachable Moments" include powerpoint slides, .pdf presentations and animations.

Tohoku, Japan "Teachable Moment." (IRIS)

Preliminary Data and Related Links

First three days of aftershocks from the March 11, 2011 M9.0 earthquake in Japan (mp4 video).
Note that there have been so many aftershocks that not all have yet been located. Earthquake data from the NEIC website.

Aftershock sequence, historical seismicity and Finite-Fault model (Charles Ammon, Penn State)

Magnitude 8.9 Earthquake Near The East Coast Of Honshu, Japan (EarthScope ANF)

Back Projection of the Rupture for the 2011 Tohoku Earthquake (Mori)

Back projection slip model, aftershock animation, links (Alex Hutko, IRIS)

Delayed Triggering of Extended Tremor in WA & OR (Wech/UW)

Earthquake Sound of the Mw9.0 Tohoku, Japan earthquake (Zhigang Peng, Georgia Tech)

Global CMT focal mechanisms for earthquakes of the Honshu sequence (Global CMT Project)

Global Displacement Wavefield from the Global Seismographic Network (New Mexico Tech)

Iterative back projection of the rupture and spatial-temporal distribution of subevents (Scripps Institute of Oceanography, UCSD)

IRIS-DMC waveform of raw data (Nagoya University)

Japan Sendai Earthquake Data Portal (Harvard Center for Geographic Analysis)

Preliminary Result of the Mar 11, 2011 Mw 9.1 Honshu Earthquake (UCSB, NIED)

Preliminary Rupture Model using USArray Transportable Array Data (Harvard University)

Slip models using teleseismic+GPS data, backprojection, high frequency radiation pattern (Tectonics Observatory, Caltech)

Moments


Graph by Charles J. Ammon	Pie Chart by Rick Aster

Cumulative seismic moment estimated for shallow earthquakes. Modified from Ammon et al., SRL 2010 - moment magnitude values assumed for the largest earthquakes were (9.0, 1952), (9.5, 1960), (9.2, 1964), (9.15, 2004), (9.05, 2011) and extended to the present using magnitude estimates from the US Geological Survey and the Global Centroid Moment Tensor Project (Harvard & Columbia Universities).

UNAVCO Event Response to the Mw=9.0 Tohoku, Japan Earthquake and Tsunami

GEO's Sendai Event Supersite Website - includes preliminary results contributed by researchers.

Magnitude 9.0 - NEAR THE EAST COAST OF HONSHU, JAPAN (USGS) 2011 March 11

Magnitude 7.1 - NEAR THE EAST COAST OF HONSHU, JAPAN (USGS) 2011 April 07

Magnitude 7.0 - OFF THE EAST COAST OF HONSHU, JAPAN (USGS) 2011 July 10

Poster of the Great Tohoku Earthquake of March 11, 2011 (USGS)

Tohoku, Japan Earthquake - Educational Slides [ppt version] (USGS NEIC)

The 2011 off the Pacific coast of Tohoku Earthquake (ERI, University of Tokyo)

AIST acceleration data (DPRI Kyoto University)
201103111447.UNDO
201103111447.JOSU

Analysis of the first wave train. (Nagoya University)

Earthquake Research Institute -- tsunami info, source inversion, waveforms, focal mechanism, attenuation, aftershocks, moment rate function

Excitation of Gravest Modes after the 2011 Tohoku Earthquake (Michel van Camp and Luis Rivera)