SCEDC Home
Home

== PRELIMINARY EVENT REPORT ==

Southern California Seismic Network: a cooperative project of
U.S. Geological Survey, Pasadena California
Caltech Seismological Laboratory, Pasadena, California



Version #5: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.

A micro quarry occurred at 4:11:30 PM (PDT) on Monday, July 9, 2018.
The magnitude 1.2 event (a probable quarry explosion) occurred 4 km (3 miles) NW of Boron, CA.
The hypocentral depth is -1 km (-0.5 miles).



Magnitude 1.2 - local magnitude (Ml)
Time Monday, July 9, 2018 at 4:11:30 PM (PDT)
Monday, July 9, 2018 at 23:11:30 (UTC)
Distance from Boron, CA - 4 km (3 miles) NW (326 degrees)
Edwards Air Force Base, CA - 27 km (17 miles) ENE (58 degrees)
California City, CA - 30 km (19 miles) ESE (110 degrees)
Johannesburg, CA - 38 km (24 miles) S (186 degrees)
Mojave, CA - 45 km (28 miles) E (93 degrees)
Coordinates 35 deg. 1.9 min. N (35.032N), 117 deg. 40.6 min. W (117.677W)
Depth -0.8 km (-0.5 miles)
Quality Fair
Location Quality Parameters Nst=18, Nph=18, Dmin=11.0 km, Rmss=0.14 sec, Erho=0.49 km, Erzz=31.61 km, Gp=72 degrees
Event ID# ci37276834
Additional Information map || waveforms
  

For more information, see http://earthquake.usgs.gov

[ Index map || big earthquake list || all earthquake list || glossary of terms || top page ]
[ Did you feel it? || ShakeMaps || Relative2Me ]
[ Data Sources || Contacts ]

Research Tools
General Earthquake Information
Stations/ Instrumentation
About the Data Center