Earthquake with magnitude of ML 3.1 on date 04-02-2023 and time 11:46:36 (UTC) in region Malta [Sea]

A magnitude ML 3.1 earthquake occured in region: Malta [Sea], on

  • 04-02-2023 11:46:36 (UTC)
  • 04-02-2023 12:46:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 34.9120, 14.2710 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 3.1 2023-02-04
11:46:36
34.9122 14.2708 10 2024-03-01
17:18:15
Bollettino Sismico Italiano INGV 120405401
Reviewed
Rev100
ML 3.1 2023-02-04
11:46:36
34.901 14.3948 10 2023-02-04
12:01:21
Sala Sismica INGV-Roma 114044031
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-04 11:46:36 ± 0.51
Latitude 34.9122 ± 0.0261
Longitude 14.2708 ± 0.0790
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 120405401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 7180
Semi-minor axis of confidence ellipse (meter) 2930
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 269
Circular confidence region, given by single value of horizontal uncertainty (meter) 7180.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 328
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 1.00364
Epicentral distance of station farthest from the epicenter (degree) 4.55057
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:3.1

Field Value
Value 3.1
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 114044031
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-04 12:01:21

ML:3.1

Field Value
Value 3.1
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 120405401
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-08-23 10:48:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAGA.HHE. 2023-02-04T11:47:47.33 0.6 undecidable manual S 16 274.9137 38 -0.53 19
IV.HLNI.HHZ. 2023-02-04T11:47:46.93 0.6 undecidable manual S 11 275.613 38 -1.08 15
IV.SERS.HHZ. 2023-02-04T11:47:46.47 0.3 undecidable manual P 24 505.1166 38 -0.03 19
IV.CROCE.HHE. 2023-02-04T11:47:33.49 0.6 undecidable manual S 6 214.3188 38 -1.33 21
IV.MSFR.HHZ. 2023-02-04T11:47:27.32 0.3 undecidable manual P 5 347.4855 38 0.44 21
IV.AIO.HHZ. 2023-02-04T11:47:27.30 0.6 undecidable manual P 14 350.0829 38 0.1 15
IV.EPZF.HHZ. 2023-02-04T11:47:25.20 0.3 undecidable manual P 9 327.228 38 0.84 18
IV.CSLB.HHZ. 2023-02-04T11:47:25.86 0.6 undecidable manual P 357 336.108 38 0.39 14
IV.CMDO.HHE. 2023-02-04T11:47:20.59 0.6 undecidable manual P 352 285.9027 38 1.37 11
IV.HLNI.HHZ. 2023-02-04T11:47:17.02 0.3 undecidable manual P 11 275.613 38 -0.91 24
IV.HAGA.HHE. 2023-02-04T11:47:17.21 0.3 undecidable manual P 16 274.9137 38 -0.64 27
IV.HSRS.HHE. 2023-02-04T11:47:16.62 0.6 undecidable manual P 19 256.5543 38 1.06 18
IV.RAFF.HHZ. 2023-02-04T11:47:15.14 0.3 undecidable manual P 2 256.4544 38 -0.41 35
IV.SSY.HHZ. 2023-02-04T11:47:15.66 0.3 undecidable manual P 16 259.3404 38 -0.25 35
IV.HMDC.HHE. 2023-02-04T11:47:13.23 0.3 undecidable manual P 11 231.6903 38 0.76 37
IV.HAVL.HHE. 2023-02-04T11:47:13.17 0.3 undecidable manual P 18 239.6823 38 -0.29 41
ML.XLND.BHE. 2023-02-04T11:47:12.86 0.6 undecidable manual S 358 124.3866 50 0.12 49
IV.HPAC.HHZ. 2023-02-04T11:47:11.57 0.6 undecidable manual P 19 210.8334 38 1.69 18
ML.MSDA.BHE. 2023-02-04T11:47:09.95 0.6 undecidable manual S 10 111.3996 50 0.67 44
IV.CROCE.HHE. 2023-02-04T11:47:09.30 0.6 undecidable manual P 6 214.3188 38 -1.01 25
ML.XLND.BHE. 2023-02-04T11:46:57.46 0.1 undecidable manual P 358 124.3866 50 -0.11 100
ML.MSDA.BHE. 2023-02-04T11:46:55.64 0.3 undecidable manual P 10 111.3996 50 0.07 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RAFF.HHN. ML:3.0 0.000188 0.46 AML other m 2023-02-04T11:47:53.44
IV.HLNI.HHE. ML:3.0 0.0001425 0.6 AML other m 2023-02-04T11:47:54.29
IV.SSY.HHE. ML:3.5 0.0006205000000000001 0.48 AML other m 2023-02-04T11:47:54.67
IV.SSY.HNE. ML:3.3 0.0003765 0.4 AML other m 2023-02-04T11:47:55.53
IV.SSY.HNN. ML:3.4 0.0004515 0.4 AML other m 2023-02-04T11:47:55.34
IV.SSY.HHN. ML:3.9 0.00151 0.4 AML other m 2023-02-04T11:47:55.34
IV.RAFF.HHE. ML:3.1 0.0002155 0.76 AML other m 2023-02-04T11:47:56.57
IV.HLNI.HHN. ML:3.0 0.000156 1.04 AML other m 2023-02-04T11:47:58.35
IV.CSLB.HHN. ML:2.6 0.00004095 0.98 AML other m 2023-02-04T11:48:08.07
IV.CSLB.HHE. ML:2.7 0.00004545000000000001 0.86 AML other m 2023-02-04T11:48:13.36
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