Earthquake Report

Magnitude: 1.8
Sat August 18, 2012 10:00AM (PDT)
Event Id: 60441447
Version #3: This report supersedes any earlier report of this event
This event has been reviewed by a seismologist
Magnitude: 1.8 Md
Time: Sat August 18, 2012 10:00AM (PDT)
Sat August 18, 2012 17:00 (UTC)
Distance From: 48.7 km ( 30.2 mi) WSW ( 237. azimuth) from The Dalles, OR
52.5 km ( 32.6 mi) WNW ( 293. azimuth) from Maupin, OR
74.6 km ( 46.3 mi) ESE ( 105. azimuth) from Portland, OR
Coordinates: 45.359, -121.698
Depth: 4.72 Km (2.88 miles)
Location Quality: Excellent
Event Id: 60441447
Horizontal Uncertainty: 0.24 Km
Depth Uncertainty: 0.55 Km
Azimuthal Gap: 96.0 deg
Number of Phases: 13
RMS Misfit: 0.08

Historic Activity

Historic_map_icon

Focal Mechanism

More Information

Solution 1

Uw60441447.uwfm1
Number of P First Motions: 16
Plane A Plane B Uncertainty
Strike 335º 145º 23.0º
Dip 10º 80º 10.0º
Rake -80º -92º 10.0º

Discrepant Stations

Station Network Channel Polarity Quality
B204 PB EHZ U 0.92
VBE UW EHZ U 0.98

Solution 2

Uw60441447.uwfm2
Number of P First Motions: 16
Plane A Plane B Uncertainty
Strike 50º 189º 13.0º
Dip 65º 32º 8.0º
Rake -70º -126º 15.0º

Discrepant Stations

Station Network Channel Polarity Quality
B204 PB EHZ U 0.92
LVP UW EHZ D 0.92
60441447

Station

Code, or name, to designate a particular seismic station