Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 3.7 on date 31-01-2023 and time 19:02:44 (UTC) in region Malta [Sea]

A magnitude ML 3.7 earthquake occured in region: Malta [Sea], on

  • 31-01-2023 19:02:44 (UTC)
  • 31-01-2023 20:02:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 34.7000, 14.2380 at 11 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 3.7 2023-01-31
19:02:44		 34.6998 14.2383 11 2023-01-31
19:16:07		 Sala Sismica INGV-Roma 113942061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-01-31 19:02:44 ± 0.52
Latitude 34.6998 ± 0.0333
Longitude 14.2383 ± 0.0416
Depth (km) 11 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 113942061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 4096
Semi-minor axis of confidence ellipse (meter) 2994
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 145
Circular confidence region, given by single value of horizontal uncertainty (meter) 4100.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 300
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 3.13054
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 11
Magnitude information

ML:3.7

Field Value
Value 3.7
Uncertainty 0.3
Num. used stations 49
Type of magnitude ML
Reference to an origin 113942061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-01-31 19:16:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MTCE.HHZ. 2023-01-31T19:04:47.09 3.0 undecidable manual Pg 14.96 0
IV.MCRV.HHZ. 2023-01-31T19:04:09.71 3.0 undecidable manual Pn -5.51 0
IV.CPTP.HHZ. 2023-01-31T19:04:02.68 0.6 undecidable manual S 359 2.7070 54 1.65 8
IV.HLNI.HHZ. 2023-01-31T19:04:00.33 0.6 undecidable manual S 11 2.6962 54 -0.44 15
IV.HAVL.HHZ. 2023-01-31T19:03:56.13 0.3 undecidable manual S 17 2.3688 54 3.18 2
IV.RAFF.HHZ. 2023-01-31T19:03:56.63 0.3 undecidable manual S 2 2.5235 54 0 31
IV.SSY.HHZ. 2023-01-31T19:03:55.96 0.6 undecidable manual S 15 2.5478 54 -1.26 13
IV.HMDC.HHZ. 2023-01-31T19:03:54.08 0.6 undecidable manual S 11 2.3005 54 2.77 3
IV.PLAC.HHZ. 2023-01-31T19:03:50.00 3.0 positive manual Pg 0.17 0
IV.MSRU.HHZ. 2023-01-31T19:03:43.83 3.0 negative manual Pg 0.01 0
IV.SOI.EHZ. 2023-01-31T19:03:43.91 3.0 positive manual Pg 0.17 0
IV.MSFR.HHZ. 2023-01-31T19:03:39.52 3.0 positive manual Pg 0.65 0
IV.MUCR.HHZ. 2023-01-31T19:03:39.27 3.0 negative manual Pg -0.17 0
IV.GIB.HHZ. 2023-01-31T19:03:38.99 3.0 undecidable manual Pg 0.96 0
IV.MBFT.HHZ. 2023-01-31T19:03:38.89 3.0 negative manual Pn -0.31 0
IV.CORL.HHZ. 2023-01-31T19:03:37.82 3.0 negative manual Pn 0.14 0
IV.CSLB.HHZ. 2023-01-31T19:03:37.43 3.0 positive manual Pg 0.06 0
IV.CIMI.HHZ. 2023-01-31T19:03:37.31 3.0 positive manual Pg 0.26 0
IV.EPZF.HHZ. 2023-01-31T19:03:35.26 3.0 positive manual Pg -1.48 0
IV.EPMN.HHZ. 2023-01-31T19:03:34.89 3.0 negative manual Pg -2.6 0
IV.MMGO.HHZ. 2023-01-31T19:03:33.74 0.1 undecidable manual P 341 3.1305 54 -0.94 23
IV.GALF.HHZ. 2023-01-31T19:03:33.54 0.1 undecidable manual P 5 3.0208 54 0.38 29
IV.CPTP.HHZ. 2023-01-31T19:03:29.02 1.0 positive manual P 359 2.7070 54 0.2 8
IV.HLNI.HHZ. 2023-01-31T19:03:28.32 1.0 negative manual P 11 2.6962 54 -0.36 8
IV.SSY.HHZ. 2023-01-31T19:03:26.59 0.1 undecidable manual P 15 2.5478 54 -0.04 40
IV.RAFF.HHZ. 2023-01-31T19:03:25.95 0.1 undecidable manual P 2 2.5235 54 -0.34 38
ML.XLND.BHE. 2023-01-31T19:03:25.95 0.6 undecidable manual S 359 1.3319 90 -0.81 40
IV.HMDC.HHZ. 2023-01-31T19:03:23.39 0.1 undecidable manual P 11 2.3005 54 0.17 50
IV.HAVL.HHZ. 2023-01-31T19:03:23.75 0.1 undecidable manual P 17 2.3688 54 -0.41 44
ML.MSDA.BHE. 2023-01-31T19:03:23.79 0.6 undecidable manual S 9 1.2177 90 0.42 46
IV.LINA.HHE. 2023-01-31T19:03:13.97 0.1 undecidable manual P 317 1.6215 54 0.13 82
ML.XLND.BHE. 2023-01-31T19:03:09.19 0.1 undecidable manual P 359 1.3319 90 0.14 94
ML.MSDA.BHE. 2023-01-31T19:03:07.08 0.1 undecidable manual P 9 1.2177 90 -0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PLAC.HNN. ML:3.6 0.00013691775 0.7552 AML other m 2023-01-31T19:05:07.99
IV.HMDC.HHE. ML:3.4 0.00050556395 0.7424 AML other m 2023-01-31T19:04:04.54
IV.HMDC.HNE. ML:4.1 0.0021640495 0.7552 AML other m 2023-01-31T19:04:04.55
IV.MMGO.HNE. ML:3.0 0.00009120000000000001 0.96 AML other m 2023-01-31T19:04:06.99
IV.HAVL.HHE. ML:4.0 0.0016457145 0.4992 AML other m 2023-01-31T19:04:09.71
IV.HAVL.HHN. ML:4.1 0.00231 1.26 AML other m 2023-01-31T19:04:10.63
IV.RAFF.HHE. ML:4.0 0.001402664 0.7808 AML other m 2023-01-31T19:04:11.70
IV.CORL.HNN. ML:3.7 0.000388 1.26 AML other m 2023-01-31T19:04:16.36
IV.CORL.HHN. ML:3.7 0.00039549999999999996 0.72 AML other m 2023-01-31T19:04:17.36
IV.HMDC.HHN. ML:4.1 0.0023637759999999997 0.6016 AML other m 2023-01-31T19:04:14.97
IV.HMDC.HNN. ML:4.1 0.0023156634999999997 0.5888 AML other m 2023-01-31T19:04:14.98
IV.MBFT.HHN. ML:3.3 0.0001385 0.94 AML other m 2023-01-31T19:04:18.84
IV.MMGO.HHN. ML:3.0 0.000077958915 0.9216 AML other m 2023-01-31T19:04:21.48
IV.RAFF.HHN. ML:3.9 0.00110608335 0.7552 AML other m 2023-01-31T19:04:20.57
IV.MMGO.HNN. ML:3.0 0.00009434999999999999 0.92 AML other m 2023-01-31T19:04:21.02
IV.GIB.HHE. ML:4.1 0.001036 1.2 AML other m 2023-01-31T19:04:24.24
IV.MMGO.HHE. ML:3.0 0.00007345 0.42 AML other m 2023-01-31T19:04:27.50
IV.CSLB.HHE. ML:3.5 0.0002485 0.86 AML other m 2023-01-31T19:04:28.56
IV.CSLB.HNE. ML:3.5 0.0002525 0.84 AML other m 2023-01-31T19:04:28.57
IV.GALF.HNE. ML:3.4 0.00021300000000000003 0.8 AML other m 2023-01-31T19:04:29.71
IV.CORL.HNE. ML:3.7 0.0003497097 0.9088 AML other m 2023-01-31T19:04:38.27
IV.CORL.HHE. ML:3.6 0.00032817160000000003 0.9088 AML other m 2023-01-31T19:04:38.27
IV.GALF.HHE. ML:4.2 0.00148 0.62 AML other m 2023-01-31T19:04:34.15
IV.GIB.HHN. ML:4.0 0.000828 0.52 AML other m 2023-01-31T19:04:35.38
IV.MBFT.HHE. ML:3.2 0.00010700000000000001 1.02 AML other m 2023-01-31T19:04:35.36
IV.GALF.HHN. ML:4.4 0.00234 0.78 AML other m 2023-01-31T19:04:37.97
IV.PLAC.HHN. ML:3.6 0.00014000000000000001 1.38 AML other m 2023-01-31T19:04:38.98
IV.GALF.HNN. ML:3.6 0.00034050000000000004 1.28 AML other m 2023-01-31T19:04:38.32
IV.PLAC.HHE. ML:3.6 0.00013845726999999998 0.4992 AML other m 2023-01-31T19:04:43.01
IV.PLAC.HNE. ML:3.6 0.00014382014999999999 0.4992 AML other m 2023-01-31T19:04:39.69
IV.EPZF.HHE. ML:4.2 0.0012375 0.7 AML other m 2023-01-31T19:04:41.17
IV.SOI.EHE. ML:3.6 0.0002205 0.94 AML other m 2023-01-31T19:04:42.02
IV.CSLB.HHN. ML:3.5 0.0002561924 0.896 AML other m 2023-01-31T19:04:42.86
IV.CSLB.HNN. ML:3.5 0.00027244025 0.832 AML other m 2023-01-31T19:04:42.85
IV.MUCR.HHN. ML:3.8 0.000408 1.08 AML other m 2023-01-31T19:04:46.11
IV.CIMI.HNE. ML:3.9 0.0006675 1.18 AML other m 2023-01-31T19:04:49.69
IV.CIMI.HHE. ML:3.8 0.0005775 1.24 AML other m 2023-01-31T19:04:49.70
IV.EPZF.HHN. ML:4.0 0.0007649933500000001 1.7664 AML other m 2023-01-31T19:04:46.03
IV.CIMI.HHN. ML:3.8 0.0004738871 0.8192 AML other m 2023-01-31T19:04:49.72
IV.CIMI.HNN. ML:3.8 0.0005059169999999999 0.6272 AML other m 2023-01-31T19:04:21.75
IV.MUCR.HHE. ML:3.8 0.000388 1.08 AML other m 2023-01-31T19:04:51.01
IV.MSFR.HHN. ML:3.8 0.00041108095 2.0992 AML other m 2023-01-31T19:04:51.69
IV.MSRU.HHN. ML:4.2 0.0009279999999999999 0.98 AML other m 2023-01-31T19:04:52.34
IV.SOI.EHN. ML:3.5 0.00017299999999999998 0.78 AML other m 2023-01-31T19:04:53.60
IV.MSFR.HHE. ML:3.6 0.00025432635000000004 0.896 AML other m 2023-01-31T19:04:51.28
IV.MSRU.HHE. ML:4.0 0.0006314999999999999 0.48 AML other m 2023-01-31T19:04:55.13
IV.CPTP.HHN. ML:4.1 0.0014898845 1.2416 AML other m 2023-01-31T19:04:37.07
IV.MBFT.HNE. ML:3.3 0.0001318068 0.512 AML other m 2023-01-31T19:04:50.80
IV.MBFT.HNN. ML:3.4 0.00017002295 0.96 AML other m 2023-01-31T19:04:08.60
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