University of Wisconsin Milwaukee Department of Geosciences
09/05/04 Honshu Japan 7.2 Mw Earthquake
09/05/04 Honshu Japan 7.2 Focal Mechanism
09/05/04 Honshu Japan 7.2 Earthquake Focal Mechanism


Earthquake Details

Seismogram Explanation

Location: Near the Coast of Honshu, Japan

P-wave arrival time: 10:20:25 (UTC); 5:20:25 am (local).

Date: September 5, 2004

PP-wave arrival time:10:24:10 (UTC); 5:24:10 (local).

Time: 10:07:07 (UTC); 5:07:07 am (local)

S-wave arrival time:10:31:33 (UTC); 5:31:33 (local).

Latitude: 33.06 N

The vertical axis is in units of displacement in centimeters.

Longitude: 136.67 E

The horizontal axis is in units of time in seconds.

Magnitude: 7.2 Mw

The beginning of the file is the origin of the event.

Depth: 11 km

Distance: 93.95 deg (6,487 miles from Milwaukee)




09/05/04 Honshu Japan 7.4 Mw Earthquake
09/05/04 Honshu Japan 7.4 Focal Mechanism
09/05/04 Honshu Japan 7.4 Earthquake Focal Mechanism


Earthquake Details

Seismogram Explanation

Location: Near the Coast of Honshu, Japan

P-wave arrival time: not verified.

Date: September 5, 2004

S-wave arrival time: not verified.

Time: 14:57:18 (UTC); 9:57:18 am (local)

The vertical axis is in units of displacement in centimeters.

Latitude: 33.22 N

The horizontal axis is in units of time in seconds.

Longitude: 137.06 E

The beginning of the file is the origin of the event.

Magnitude: 7.4 Mw

Depth: 4 km

Distance: 93.06 deg (6,426 miles from Milwaukee)


Updated as of by Brett Ketter

Seismograms created using Seismic Analysis Code (SAC; Lawrence Livermore National Laboratory)
Focal mecanisms created using Generic Mapping Tools (GMT; Wessel and Smith; University of Hawaii, Manoa)

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