Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Mwp 5.8 on date 08-03-2023 and time 13:43:26 (UTC) in region Western Caroline Islands, Micronesia [Sea: Micronesia]

A magnitude Mwp 5.8 earthquake occured in region: Western Caroline Islands, Micronesia [Sea: Micronesia], on

  • 08-03-2023 13:43:26 (UTC)
  • 08-03-2023 14:43:26 (UTC +01:00) Italian time
  • 08-03-2023 23:43:26 (UTC +10:00) local time in the region of the earthquake (Pacific/Guam)

and geographic coordinates (lat, lon) 11.4540, 141.4530 at 20 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

No Italian municipalities within 100 km from the epicenter with at least 50000 inhabitants.

Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		mb 5.0
Mwp 5.8
Mwpd 6.2 		2023-03-08
13:43:26		 11.4539 141.453 20 2023-03-08
14:00:57		 Sala Sismica INGV-Roma 115110041
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-08 13:43:26
Latitude 11.4539
Longitude 141.4530
Depth (km) 20 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 115110041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 19399
Semi-minor axis of confidence ellipse (meter) 1877
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 101
Circular confidence region, given by single value of horizontal uncertainty (meter) 15659.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91.2538
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 34
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 2.20244
Epicentral distance of station closest to the epicenter (degree) 3.95928
Epicentral distance of station farthest from the epicenter (degree) 95.02271
Number of stations at which the event was observed 34
Number of stations from which data was used for origin computation 34
Magnitudes information

Mwp:5.8

Field Value
Value 5.8
Uncertainty 0.1
Num. used stations 10
Type of magnitude Mwp
Reference to an origin 115110041
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2023-03-08 14:00:57

Mwpd:6.2

Field Value
Value 6.2
Uncertainty 0.1
Num. used stations 8
Type of magnitude Mwpd
Reference to an origin 115110041
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2023-03-08 14:00:57

mb:5.0

Field Value
Value 5.0
Uncertainty 0.2
Num. used stations 30
Type of magnitude mb
Reference to an origin 115110041
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2023-03-08 14:00:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
US.RLMT.BHZ.00 2023-03-08T13:56:49.73 10.0 positive automatic P 42 95.0227 3.25049 0.0628802
US.ELK.BHZ.00 2023-03-08T13:56:36.50 10.0 positive automatic P 48 92.3639 2.23236 0.0786322
US.HLID.BHZ.00 2023-03-08T13:56:35.15 10.0 positive automatic P 45 92.0915 2.22076 0.0794
GE.DAG.BHZ. 2023-03-08T13:56:28.01 10.0 positive automatic P 356 91.0038 0.411146 0.0833987
US.BMO.BHZ.00 2023-03-08T13:56:23.50 10.0 negative automatic P 44 89.7320 1.63761 0.0926481
BK.CMB.BHZ.00 2023-03-08T13:56:22.07 10.0 negative automatic P 51 89.2643 2.4744 0.0969089
US.WVOR.BHZ.00 2023-03-08T13:56:21.95 10.0 positive automatic P 47 89.4523 1.36952 0.0990793
US.NEW.BHZ.00 2023-03-08T13:56:20.33 10.0 positive automatic P 41 88.9103 2.38303 0.102945
US.NLWA.BHZ.00 2023-03-08T13:55:59.13 10.0 positive automatic P 43 84.7154 1.63469 0.133754
IU.COLA.BHZ.00 2023-03-08T13:54:44.10 10.0 negative automatic P 25 71.4890 -0.00757744 0.257294
AT.TTA.BHZ. 2023-03-08T13:54:20.50 10.0 negative automatic P 26 67.5068 0.861656 0.308052
II.KDAK.BHZ.00 2023-03-08T13:54:19.72 10.0 negative automatic P 32 67.6118 -0.435875 0.313412
II.KURK.BHZ.00 2023-03-08T13:53:56.72 10.0 positive automatic P 321 64.0815 -0.704445 0.346799
AK.GAMB.BHZ. 2023-03-08T13:53:42.59 10.0 positive automatic P 21 61.6793 1.18127 0.387705
IU.MAKZ.BHZ.00 2023-03-08T13:53:37.20 10.0 negative automatic P 318 60.9529 0.597218 0.402653
NZ.OUZ.HHZ.10 2023-03-08T13:53:04.36 10.0 negative automatic P 148 55.7045 4.52551 0.461935
IO.EVN.BHZ. 2023-03-08T13:52:45.60 10.0 positive automatic P 296 53.5507 0.542102 0.328781
IU.YAK.BHZ.00 2023-03-08T13:52:26.22 10.0 positive automatic P 353 51.2882 -1.21482 0.440569
IU.MA2.BHZ.00 2023-03-08T13:52:05.72 10.0 positive automatic P 6 48.6215 -1.49685 0.450765
AU.MORW.BHZ. 2023-03-08T13:51:55.00 10.0 positive automatic P 211 47.3670 -1.51099 0.611983
IU.ULN.BHZ.00 2023-03-08T13:51:50.57 10.0 positive automatic P 328 46.3845 0.522942 0.50824
AU.FORT.BHZ.00 2023-03-08T13:51:31.40 10.0 positive automatic P 197 44.1483 -0.655253 0.661566
AU.WRKA.BHZ.00 2023-03-08T13:50:47.13 10.0 positive automatic P 199 38.6793 -0.12828 0.763887
IU.MAJO.BHZ.00 2023-03-08T13:48:47.07 10.0 positive automatic P 354 25.2611 -2.62185 0.97561
JP.JGF.BHZ. 2023-03-08T13:48:40.40 10.0 positive automatic P 352 24.4328 -1.7844 0.615385
G.INU.BHZ.00 2023-03-08T13:48:39.26 10.0 positive automatic P 351 24.2296 -0.98989 0.43956
JP.JMN.BHZ. 2023-03-08T13:48:31.45 10.0 positive automatic P 344 23.3285 -0.428958 0.769231
JP.JSU.BHZ. 2023-03-08T13:48:22.80 10.0 positive automatic P 335 22.4795 -0.0770043 0.833333
GE.LUWI.BHZ. 2023-03-08T13:48:22.62 10.0 negative automatic P 237 22.3778 0.889317 0
GE.PMG.BHZ.00 2023-03-08T13:48:10.22 10.0 negative automatic P 165 21.6185 -3.4068 0.833333
GE.SANI.BHZ. 2023-03-08T13:48:04.62 10.0 positive automatic P 230 20.4626 3.46825 0.888889
JP.JOW.BHZ. 2023-03-08T13:47:56.05 10.0 positive automatic P 323 19.7550 2.56922 0.816327
GE.FAKI.BHZ. 2023-03-08T13:47:20.47 10.0 negative automatic P 213 17.0396 -1.42441 0.833333
IU.GUMO.BHZ.00 2023-03-08T13:44:25.77 10.0 positive automatic P 57 3.9593 1.33241 0.97561
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download