Earthquake Details

Seismogram Explanation

Location: Near West Coast of Honshu, Japan

P-wave arrival time: 09:08:57 UTC; 4:08:57 am (local)

Date: October 23, 2004

PP-wave arrival time: 09:12:28 UTC; 4:12:28 am (local)

Time: 08:56:01 (UTC); 3:56:01 am (local)

S-wave arrival time: 09:19:48 UTC; 4:19:48 am (local)

Latitude: 37.20 N

The vertical axis is in units of displacement in centimeters.

Longitude: 138.81 E

The horizontal axis is in units of time in seconds.

Magnitude: 6.6 Mw

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

Depth: 19 km

Distance: 89.51 deg (6,181 miles from Milwaukee)