last update to page: April 23 2018 18:58:19 (UTC).

Magnitude 3.9 Earthquake: Southern California

Summary

The red marker denotes the earthquake epicenter.

On Mon Apr 23rd 2018 00:46:08 (UTC) the seismic network recorded an earthquake (preliminary 3.87 mw) located in Southern California. Seismic region California - Nevada Region.

The epicentral distance (i.e. distance separating the location to the epicenter) to the closest station PFO in the network is 36.7 km.

If you felt the quake, the USGS would like to know. Please add your comments to the USGS page "Did you feel it?".

Details

Time:Mon Apr 23rd 2018 00:46:08 (UTC)
Magnitude:3.87 mw
Location:(33.921,-116.3217)
Depth:8.2 km
Author:USGS:ci
evid,orid:1644908,1719598
nass,ndef:164,101
Authoritative:y

Proximity to Population Centers

Event and active stations

The red marker denotes the earthquake epicenter.

Seismic waveforms for closest station

Closest station with identified signal. Not filtered.

Seismic waveforms for vertical channels in network

Subset of several stations close to the event. Not filtered.

Seismic Analysis

Moment Tensor

Signal description at some stations

STA_CHANS-E DeltaS-E AzimuthPhase TimeSignal/NoiseTime ResidualV. ModelAutharid
PFO_HHZ0.33°20.27°Pg2018-04-23 00:46:15.1084 UTC3296-0.27iasp91dbp:jtytell:1811733927
PFO_HHE0.33°20.27°Sg2018-04-23 00:46:19.6364 UTC-1-0.456iasp91dbp:jtytell:1811734918
KNW_HHZ0.385°57.34°Pg2018-04-23 00:46:16.1631 UTC830.9-0.246iasp91dbp:jtytell:1811733931
KNW_HHE0.385°57.34°Sg2018-04-23 00:46:21.2964 UTC-1-0.574iasp91dbp:jtytell:1811734925
TRO_HHZ0.407°12.25°Pg2018-04-23 00:46:16.6644 UTC573.88-0.166iasp91dbp:jtytell:1811733933
GVAR1_HHE0.409°51.36°Sg2018-04-23 00:46:22.081 UTC-1-0.58iasp91dbp:jtytell:1811734930
TMSP_HHZ0.425°44.59°Pg2018-04-23 00:46:17.1014 UTC-1-0.062iasp91dbp:jtytell:1811734866
TMSP_HHN0.425°44.59°Sg2018-04-23 00:46:23.1957 UTC-10.024iasp91dbp:jtytell:1811734932
RRSP_HHZ0.439°52.06°Pg2018-04-23 00:46:17.3297 UTC-1-0.116iasp91dbp:jtytell:1811734870
RRSP_HHN0.439°52.06°Sg2018-04-23 00:46:23.4628 UTC-1-0.195iasp91dbp:jtytell:1811734936
SND_HHZ0.441°33.19°Pg2018-04-23 00:46:17.3484 UTC1795.3-0.135iasp91dbp:jtytell:1811733936
SND_HHN0.441°33.19°Sg2018-04-23 00:46:23.5227 UTC-1-0.2iasp91dbp:jtytell:1811734940
RHIL_HHZ0.448°56.32°Pg2018-04-23 00:46:17.4644 UTC-1-0.149iasp91dbp:jtytell:1811734873
RHIL_HHN0.448°56.32°Sg2018-04-23 00:46:23.6603 UTC-1-0.286iasp91dbp:jtytell:1811734943
WMC_HHZ0.455°40.1°Pg2018-04-23 00:46:17.5684 UTC397.95-0.167iasp91dbp:jtytell:1811733942
WMC_HHN0.455°40.1°Sg2018-04-23 00:46:23.7371 UTC-1-0.42iasp91dbp:jtytell:1811734944
FRD_HHZ0.486°28.62°Pg2018-04-23 00:46:18.0784 UTC1293.4-0.247iasp91dbp:jtytell:1811733944
FRD_HHN0.486°28.62°Sg2018-04-23 00:46:24.6459 UTC-1-0.53iasp91dbp:jtytell:1811734948
CRY_HHZ0.496°44.07°Pg2018-04-23 00:46:18.2684 UTC1939.2-0.244iasp91dbp:jtytell:1811733946
CRY_HHE0.496°44.07°Sg2018-04-23 00:46:25.0529 UTC-1-0.446iasp91dbp:jtytell:1811734950
BZN_HHZ0.517°33.68°Pg2018-04-23 00:46:18.7084 UTC1218.4-0.199iasp91dbp:jtytell:1811733948
BZN_HHN0.517°33.68°Sg2018-04-23 00:46:25.6223 UTC-1-0.558iasp91dbp:jtytell:1811734951
JORD_HHZ0.523°30.85°Pg2018-04-23 00:46:18.7945 UTC2713-0.237iasp91dbp:jtytell:1811733950
JORD_HHE0.523°30.85°Sg2018-04-23 00:46:25.9735 UTC-1-0.42iasp91dbp:jtytell:1811734952
RDM_HHZ0.525°56.21°Pg2018-04-23 00:46:18.8084 UTC230.41-0.262iasp91dbp:jtytell:1811733952
RDM_HHE0.525°56.21°Sg2018-04-23 00:46:25.9288 UTC-1-0.531iasp91dbp:jtytell:1811734953
LVA2_HHZ0.603°19.26°Pg2018-04-23 00:46:20.2531 UTC1809.4-0.3iasp91dbp:jtytell:1811733954
SMER_HHZ0.845°56.51°Pg2018-04-23 00:46:24.2984 UTC224.7-0.852iasp91dbp:jtytell:1811733971
SMER_HHN0.845°56.51°Sg2018-04-23 00:46:35.268 UTC-1-1.683iasp91dbp:jtytell:1811734968
MONP2_HHZ1.032°4.64°Pg2018-04-23 00:46:27.7884 UTC1069.4-0.943iasp91dbp:jtytell:1811733972
MONP2_HHE1.032°4.64°Sg2018-04-23 00:46:41.4262 UTC-1-1.706iasp91dbp:jtytell:1811734974
CPE_HHZ1.222°32.15°Pb2018-04-23 00:46:30.4692 UTC273.04-1.751iasp91dbp:jtytell:1811733973
CPE_HHN1.222°32.15°Sb2018-04-23 00:46:46.2524 UTC-1-2.982iasp91dbp:jtytell:1811734979
SIO5_HHN1.329°35.4°Sb2018-04-23 00:46:50.0566 UTC-1-2.359iasp91dbp:jtytell:1811734984

External resources

Current seismic activity measured by the seismic network

Click the link below to observe an interactive map of earthquakes recorded by the station deployment: