Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 3.3 on date 22-02-2023 and time 10:58:34 (Italy) in region Malta [Sea]

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

  • 22-02-2023 09:58:34 (UTC)
  • 22-02-2023 10:58:34 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 34.8010, 14.2950 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 3.3 2023-02-22
09:58:34		 34.8012 14.2947 10 2023-02-22
10:14:26		 Sala Sismica INGV-Roma 114693891
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-22 09:58:34 ± 0.34
Latitude 34.8012 ± 0.0189
Longitude 14.2947 ± 0.0219
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 114693891

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2650
Semi-minor axis of confidence ellipse (meter) 1250
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 317
Circular confidence region, given by single value of horizontal uncertainty (meter) 2650.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 281
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 3.19259
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 11
Magnitude information

ML:3.3

Field Value
Value 3.3
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 114693891
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-22 10:14:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GIGS.HHZ. 2023-02-22T10:00:44.14 3.0 undecidable manual Pg 17.35 0
IV.GUMA.HHZ. 2023-02-22T10:00:39.48 3.0 negative manual Pn 4.13 0
IV.FDMO.HHZ. 2023-02-22T10:00:35.29 3.0 undecidable manual Pn -0.03 0
IV.MGR.HHZ. 2023-02-22T10:00:10.71 3.0 undecidable manual Pg 14.51 0
IV.ORI.HHZ. 2023-02-22T10:00:05.37 3.0 positive manual Pg 7.3 0
IV.SIRI.HNZ. 2023-02-22T10:00:01.83 3.0 undecidable manual Pg 4.17 0
1J.FX14.HHZ.00 2023-02-22T09:59:56.97 3.0 undecidable manual Sg 0.08 0
IV.RAFF.HHZ. 2023-02-22T09:59:44.17 0.6 undecidable manual S 1 2.4201 38 0.23 43
IV.PLAC.HHZ. 2023-02-22T09:59:37.44 3.0 negative manual Pn -1.34 0
IV.MPNC.HHZ. 2023-02-22T09:59:30.56 3.0 negative manual P 1.09 0
1J.FX14.HHZ.00 2023-02-22T09:59:28.20 3.0 negative manual Pn -1.44 0
IV.CSLB.HHZ. 2023-02-22T09:59:24.78 0.6 undecidable manual P 357 3.1404 38 0.35 28
IV.CORL.HHZ. 2023-02-22T09:59:24.70 0.6 undecidable manual P 346 3.1926 38 -0.46 27
IV.HLNI.HHZ. 2023-02-22T09:59:16.76 0.6 undecidable manual P 10 2.5882 38 -0.05 37
IV.RAFF.HHZ. 2023-02-22T09:59:14.15 1.0 undecidable manual P 1 2.4201 38 -0.35 21
IV.CLTA.HHE. 2023-02-22T09:59:14.19 1.0 undecidable manual P 354 2.3706 38 0.38 22
IV.SSY.HHZ. 2023-02-22T09:59:14.69 0.6 undecidable manual P 15 2.4381 38 -0.04 44
IV.HPAC.HHZ. 2023-02-22T09:59:09.00 1.0 undecidable manual P 17 1.9992 38 0.33 30
ML.MSDA.BHZ. 2023-02-22T09:59:09.80 0.6 undecidable manual S 8 1.1098 50 -0.06 100
IV.CROCE.HHZ. 2023-02-22T09:59:09.55 0.6 undecidable manual P 5 2.0397 38 0.32 59
IV.LINA.HHE. 2023-02-22T09:59:03.34 0.6 undecidable manual P 313 1.5828 50 0.43 77
IV.LPDG.HHE. 2023-02-22T09:59:01.76 0.6 undecidable manual P 298 1.5369 50 -0.36 80
ML.MSDA.BHZ. 2023-02-22T09:58:54.48 0.6 undecidable manual P 8 1.1098 50 -0.34 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HPAC.HHE. ML:3.6 0.000891 1 AML other m 2023-02-22T09:59:42.15
IV.HPAC.HHN. ML:3.5 0.000762 0.92 AML other m 2023-02-22T09:59:45.16
IV.RAFF.HHE. ML:3.2 0.0002825 1.46 AML other m 2023-02-22T09:59:57.86
IV.RAFF.HHN. ML:3.3 0.00028849999999999997 1.56 AML other m 2023-02-22T09:59:59.01
IV.HLNI.HHN. ML:3.3 0.0002635 1.2 AML other m 2023-02-22T10:00:03.07
IV.HLNI.HHE. ML:3.1 0.000187 0.7 AML other m 2023-02-22T10:00:03.46
IV.CORL.HHN. ML:3.0 0.0000847 0.66 AML other m 2023-02-22T10:00:05.53
IV.MPNC.HHN. ML:3.4 0.00017649999999999998 0.82 AML other m 2023-02-22T10:00:12.30
IV.CORL.HHE. ML:3.0 0.0000854 0.98 AML other m 2023-02-22T10:00:21.79
IV.MPNC.HHE. ML:3.4 0.000174 0.98 AML other m 2023-02-22T10:00:23.40
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