Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 3.1 on date 04-02-2023 and time 12:46:36 (Italy) 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) 34.9010, 14.3950 at 10 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 		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 ± 0.46
Latitude 34.9010 ± 0.0261
Longitude 14.3948 ± 0.0592
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 114044031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 5540
Semi-minor axis of confidence ellipse (meter) 2590
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 255
Circular confidence region, given by single value of horizontal uncertainty (meter) 5540.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 327
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 4.51999
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 15
Magnitude 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
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SCTE.HHZ. 2023-02-04T11:48:59.23 3.0 undecidable manual Sn -0.64 0
IX.COL3.HHZ.02 2023-02-04T11:48:48.83 3.0 undecidable manual Sn -0.36 0
IV.HLNI.HHZ. 2023-02-04T11:47:48.12 0.6 undecidable manual S 9 2.4758 38 0.12 23
IV.HAGA.HHE. 2023-02-04T11:47:47.33 0.6 undecidable manual S 14 2.4605 38 -0.29 22
IV.SERS.HHZ. 2023-02-04T11:47:46.49 0.1 undecidable manual P 23 4.5200 38 0.26 26
IV.CROCE.HHE. 2023-02-04T11:47:34.99 0.3 undecidable manual S 3 1.9335 38 -0.04 55
IV.AIO.HHZ. 2023-02-04T11:47:27.41 0.6 negative manual P 12 3.1413 38 0.23 16
IV.MSFR.HHZ. 2023-02-04T11:47:27.46 0.1 undecidable manual P 3 3.1350 38 0.37 31
IV.CSLB.HHZ. 2023-02-04T11:47:26.64 0.6 positive manual P 355 3.0469 38 0.77 14
IV.EPZF.HHZ. 2023-02-04T11:47:24.81 0.1 undecidable manual P 7 2.9444 38 0.34 32
IV.CMDO.HHE. 2023-02-04T11:47:20.64 0.1 undecidable manual P 350 2.6026 38 0.9 30
IV.HLNI.HHZ. 2023-02-04T11:47:17.07 0.3 negative manual P 9 2.4758 38 -0.92 26
IV.HAGA.HHE. 2023-02-04T11:47:17.20 0.1 undecidable manual P 14 2.4605 38 -0.57 41
IV.SSY.HHZ. 2023-02-04T11:47:16.24 0.6 negative manual P 13 2.3211 38 0.39 25
IV.HSRS.HHE. 2023-02-04T11:47:15.47 0.1 undecidable manual P 17 2.2906 38 0.05 56
IV.RAFF.HHZ. 2023-02-04T11:47:14.99 0.1 undecidable manual P 359 2.3203 38 -0.85 43
IV.HMDC.HHE. 2023-02-04T11:47:13.24 0.1 undecidable manual P 9 2.0801 38 0.71 55
IV.HAVL.HHE. 2023-02-04T11:47:13.32 0.1 undecidable manual P 16 2.1395 38 -0.02 64
ML.XLND.BHE. 2023-02-04T11:47:13.74 0.6 undecidable manual S 353 1.1394 50 0.28 52
IV.HPAC.HHZ. 2023-02-04T11:47:11.53 3.0 undecidable manual P 0
IV.CROCE.HHE. 2023-02-04T11:47:10.50 0.1 undecidable manual P 3 1.9335 38 0 74
ML.XLND.BHE. 2023-02-04T11:46:57.58 0.1 undecidable manual P 353 1.1394 50 -0.47 100
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
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download