Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 3.0 on date 28-05-2023 and time 23:27:42 (Italy) in region Malta [Sea]

A magnitude ML 3.0 earthquake occured in region: Malta [Sea], on

  • 28-05-2023 21:27:42 (UTC)
  • 28-05-2023 23:27:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 34.8720, 14.4350 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 3.0 2023-05-28
21:27:42		 34.8718 14.435 10 2023-05-28
21:47:19		 Sala Sismica INGV-Roma 117829181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-28 21:27:42 ± 0.59
Latitude 34.8718 ± 0.0342
Longitude 14.4350 ± 0.0866
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 117829181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 8010
Semi-minor axis of confidence ellipse (meter) 3630
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 280
Circular confidence region, given by single value of horizontal uncertainty (meter) 8010.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 336
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 1.93264
Epicentral distance of station farthest from the epicenter (degree) 3.15482
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:3.0

Field Value
Value 3.0
Uncertainty 0.4
Num. used stations 14
Type of magnitude ML
Reference to an origin 117829181
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-28 21:47:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CLTA.HHZ. 2023-05-28T21:28:50.39 0.3 undecidable manual S 351 257.1537 38 0.25 86
IV.HMDC.HHE. 2023-05-28T21:28:45.57 0.3 undecidable manual S 8 233.5884 38 0.5 88
IV.SCIC.HHE. 2023-05-28T21:28:41.03 0.6 undecidable manual S 6 214.5186 38 0.08 68
IV.CROCE.HHE. 2023-05-28T21:28:40.69 0.3 undecidable manual S 2 217.7154 38 -0.95 78
IV.CORL.HHZ. 2023-05-28T21:28:33.28 0.1 undecidable manual P 344 350.1828 38 -0.04 80
IV.PLLN.EHZ. 2023-05-28T21:28:33.61 0.1 undecidable manual P 356 347.1858 38 0.67 69
IV.GIB.HHZ. 2023-05-28T21:28:33.58 0.1 undecidable manual P 354 347.7852 38 0.55 72
IV.CIMI.HHZ. 2023-05-28T21:28:32.21 0.1 undecidable manual P 347 342.6015 38 -0.17 81
IV.ALJA.HHZ. 2023-05-28T21:28:30.48 0.3 undecidable manual P 349 324.9303 38 0.3 64
IV.RESU.HHZ. 2023-05-28T21:28:28.39 1.0 undecidable manual P 354 309.6567 38 0.11 24
IV.CPTP.HHZ. 2023-05-28T21:28:25.73 0.1 undecidable manual P 355 282.3063 38 0.85 86
IV.HVZN.HHE. 2023-05-28T21:28:21.84 0.3 undecidable manual P 6 257.0538 38 0.11 88
IV.CLTA.HHZ. 2023-05-28T21:28:20.80 0.1 undecidable manual P 351 257.1537 38 -0.94 90
IV.HMDC.HHE. 2023-05-28T21:28:18.88 0.3 undecidable manual P 8 233.5884 38 0.07 97
IV.HVIT.HHE. 2023-05-28T21:28:18.22 0.3 undecidable manual P 2 235.3866 38 -0.81 77
IV.CROCE.HHE. 2023-05-28T21:28:16.28 0.3 undecidable manual P 2 217.7154 38 -0.55 91
IV.SCIC.HHE. 2023-05-28T21:28:16.64 0.3 undecidable manual P 6 214.5186 38 0.2 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CLTA.HHE. ML:2.3 0.00003585 0.82 AML other m 2023-05-28T21:28:33.17
IV.CLTA.HHN. ML:2.6 0.00006945 1.16 AML other m 2023-05-28T21:28:37.38
IV.GIB.HHN. ML:3.2 0.00014050000000000003 0.44 AML other m 2023-05-28T21:28:40.52
IV.CIMI.HHN. ML:3.0 0.0000953 1.14 AML other m 2023-05-28T21:28:50.30
IV.RESU.HHN. ML:2.6 0.0000459 0.84 AML other m 2023-05-28T21:28:50.15
IV.CIMI.HHE. ML:3.2 0.0001295 1.28 AML other m 2023-05-28T21:28:51.27
IV.RESU.HHE. ML:2.7 0.000055650000000000004 0.9 AML other m 2023-05-28T21:28:53.72
IV.HPAC.HHE. ML:3.7 0.00132 0.84 AML other m 2023-05-28T21:28:56.27
IV.ALJA.HHN. ML:2.6 0.000046649999999999996 0.8 AML other m 2023-05-28T21:28:58.53
IV.ALJA.HHE. ML:2.6 0.000041599999999999995 0.92 AML other m 2023-05-28T21:28:59.35
IV.HPAC.HHN. ML:3.7 0.00133 0.5 AML other m 2023-05-28T21:29:03.49
IV.GIB.HHE. ML:3.2 0.00014350000000000002 0.68 AML other m 2023-05-28T21:29:12.40
IV.PLLN.EHE. ML:3.2 0.00014900000000000002 0.9 AML other m 2023-05-28T21:29:12.47
IV.PLLN.EHN. ML:3.5 0.000263 0.52 AML other m 2023-05-28T21:29:14.65
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