Earthquake with magnitude of ML 3.3 on date 31-01-2023 and time 12:12:26 (UTC) in region Libya [Sea]

A magnitude ML 3.3 earthquake occured in region: Libya [Sea], on

  • 31-01-2023 12:12:26 (UTC)
  • 31-01-2023 13:12:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 34.5010, 14.3030 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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
Bulletin
Rev1000
ML 3.3 2023-01-31
12:12:26
34.501 14.3032 10 2024-03-01
17:17:56
Bollettino Sismico Italiano INGV 114856221
Reviewed
Rev100
ML 3.1 2023-01-31
12:12:30
34.7907 14.4622 10 2023-01-31
12:47:27
Sala Sismica INGV-Roma 113934871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-01-31 12:12:26 ± 1.16
Latitude 34.5010 ± 0.0872
Longitude 14.3032 ± 0.1168
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 114856221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 12310
Semi-minor axis of confidence ellipse (meter) 7520
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 309
Circular confidence region, given by single value of horizontal uncertainty (meter) 12310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 337
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.43
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 3.88327
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:3.3

Field Value
Value 3.3
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 114856221
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-08-09 15:54:07

ML:3.1

Field Value
Value 3.1
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 113934871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-01-31 12:47:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PAOL.HHZ. 2023-01-31T12:14:53.38 3.0 undecidable manual Sn 5.34 0
IV.CDRU.HHZ. 2023-01-31T12:14:46.16 3.0 undecidable manual Sg 10.04 0
IV.FAGN.HHZ. 2023-01-31T12:14:38.42 3.0 negative manual Pg 17.030001 0
IV.ARVD.HHZ. 2023-01-31T12:14:36.71 3.0 negative manual Pn -2.48 0
IV.CAR1.HHZ. 2023-01-31T12:14:17.35 3.0 undecidable manual Sn 3.13 0
IV.SALB.HHZ. 2023-01-31T12:13:56.41 3.0 undecidable manual Pn 3.66 0
IV.HSRS.HNE. 2023-01-31T12:13:42.70 0.6 undecidable manual S 16 299.1783 38 0.05 65
IV.GRI.EHZ. 2023-01-31T12:13:42.84 3.0 positive manual Pn 1.34 0
IV.MSRU.HHZ. 2023-01-31T12:13:27.44 0.3 undecidable manual P 14 431.0463 38 0.6 51
IV.MUCR.HHZ. 2023-01-31T12:13:22.78 0.3 undecidable manual P 7 396.2034 38 0.28 66
IV.MSFR.HHZ. 2023-01-31T12:13:22.87 0.3 undecidable manual P 4 392.7069 38 0.8 56
IV.CSLB.HHZ. 2023-01-31T12:13:21.35 0.3 undecidable manual P 357 381.8289 38 0.64 63
IV.EPZF.HHZ. 2023-01-31T12:13:20.74 0.3 undecidable manual P 7 371.9499 38 1.26 49
IV.GALF.HHN. 2023-01-31T12:13:18.73 0.3 undecidable manual P 4 356.8761 38 1.13 56
IV.CPTP.HHE. 2023-01-31T12:13:14.63 0.3 undecidable manual P 358 322.6326 38 1.28 58
IV.HLNI.HHZ. 2023-01-31T12:13:12.36 0.3 undecidable manual P 9 319.9353 38 -0.66 78
IV.HAGA.HHN. 2023-01-31T12:13:12.33 0.3 undecidable manual P 14 318.1371 38 -0.46 84
IV.HCRL.HHE. 2023-01-31T12:13:11.60 0.3 undecidable manual P 12 315.4509 38 -0.86 72
IV.SSY.HNZ. 2023-01-31T12:13:10.84 0.3 undecidable manual P 13 302.7636 38 -0.03 96
IV.HSRS.HNE. 2023-01-31T12:13:10.38 0.3 undecidable manual P 16 299.1783 38 -0.05 97
IV.RAFF.HHZ. 2023-01-31T12:13:10.47 0.3 undecidable manual P 1 301.9644 38 -0.3 91
1J.FX01.HHE. 2023-01-31T12:13:10.63 0.3 undecidable manual P 17 297.48 38 0.42 90
IV.HVZN.HHZ. 2023-01-31T12:13:09.75 0.3 undecidable manual P 7 299.2782 38 -0.69 82
IV.CLTA.HHZ. 2023-01-31T12:13:09.30 0.6 undecidable manual P 354 296.3811 38 -0.77 53
IV.HAVL.HHN. 2023-01-31T12:13:08.14 0.3 undecidable manual P 15 282.5061 38 -0.21 98
IV.HMDC.HHN. 2023-01-31T12:13:07.34 0.3 undecidable manual P 9 276.0126 38 -0.21 100
IV.HVIT.HHE. 2023-01-31T12:13:06.83 0.3 undecidable manual P 4 277.1115 38 -0.85 81
IV.HPAC.HHE. 2023-01-31T12:13:05.69 0.3 undecidable manual P 15 253.6572 38 0.93 84
IV.CROCE.HHZ. 2023-01-31T12:13:04.91 0.3 undecidable manual P 5 259.4403 38 -0.58 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RAFF.HHE. ML:3.2 0.0001969227 1.024 AML other m 2023-01-31T12:13:23.35
IV.RAFF.HHN. ML:3.1 0.00013977145000000003 0.4992 AML other m 2023-01-31T12:13:23.23
IV.HVZN.HNN. ML:3.5 0.000412163 0.3968 AML other m 2023-01-31T12:13:25.36
IV.HVZN.HHN. ML:3.5 0.00041528835 0.384 AML other m 2023-01-31T12:13:25.36
IV.HLNI.HHE. ML:2.9 0.000087721915 0.2752 AML other m 2023-01-31T12:13:26.95
IV.HVZN.HHE. ML:3.4 0.0002883035 0.48 AML other m 2023-01-31T12:13:30.34
IV.HVZN.HNE. ML:3.4 0.00028148320000000003 0.4992 AML other m 2023-01-31T12:13:30.34
IV.HLNI.HHN. ML:3.0 0.000114383865 0.2176 AML other m 2023-01-31T12:13:34.99
IV.EPZF.HHN. ML:3.5 0.00023449125 1.344 AML other m 2023-01-31T12:13:46.86
IV.MSFR.HHN. ML:3.6 0.00022022924999999999 1.3184 AML other m 2023-01-31T12:13:47.55
IV.GRI.EHN. ML:3.6 0.00010885159999999999 0.0768 AML other m 2023-01-31T12:13:55.40
IV.GRI.EHE. ML:3.6 0.00010047282249999999 0.0576 AML other m 2023-01-31T12:13:55.42
IV.EPZF.HHE. ML:3.5 0.0002208612 1.0368 AML other m 2023-01-31T12:13:58.90
IV.MSFR.HHE. ML:3.5 0.00020935355 1.44 AML other m 2023-01-31T12:13:59.14
IV.CSLB.HHE. ML:3.2 0.000093061375 0.8384 AML other m 2023-01-31T12:13:59.42
IV.CSLB.HNN. ML:3.1 0.00009245295 0.5184 AML other m 2023-01-31T12:14:02.73
IV.CSLB.HHN. ML:3.2 0.00009749807999999999 0.4992 AML other m 2023-01-31T12:14:02.73
IV.CSLB.HNE. ML:3.3 0.000127397635 1.3504 AML other m 2023-01-31T12:14:03.03
IV.MUCR.HHN. ML:3.3 0.00013047583499999998 1.216 AML other m 2023-01-31T12:14:04.65
IV.MUCR.HHE. ML:3.2 0.0000924727 0.9408 AML other m 2023-01-31T12:14:07.42
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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