Earthquake Report

Magnitude: 1.0
Mon August 20, 2012 11:53AM (PDT)
Event Id: 60442177
Version #13: This report supersedes any earlier report of this event
This event has been reviewed by a seismologist
Magnitude: 1.0 Md (Probable explosion)
Time: Mon August 20, 2012 11:53AM (PDT)
Mon August 20, 2012 18:53 (UTC)
Distance From: 11.5 km ( 7.2 mi) SE ( 125. azimuth) from Astoria, OR
59.4 km ( 36.9 mi) W ( 269. azimuth) from Longview, WA
75.2 km ( 46.7 mi) N ( 8. azimuth) from Tillamook, OR
Coordinates: 46.126, -123.712
Depth: 0.01 Km (0.01 miles)
Location Quality: Fair
Event Id: 60442177
Horizontal Uncertainty: 1.49 Km
Depth Uncertainty: 31.61 Km
Azimuthal Gap: 149.0 deg
Number of Phases: 13
RMS Misfit: 0.55

Historic Activity


Map boundaries

 The red polygon is the reporting region for  this map; the black polygon is the authoritative region of the PNSN. Events inside the authoritative network are rendered as cirlces; events outside the authoritative region but inside the reporting region are rendered as squares. Explosions are always rendered as stars.  More

Cross Section

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