Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 3.6 on date 23-04-2023 and time 15:28:06 (UTC) in region Malta [Sea]

A magnitude ML 3.6 earthquake occured in region: Malta [Sea], on

  • 23-04-2023 15:28:06 (UTC)
  • 23-04-2023 17:28:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 34.7790, 15.1450 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.

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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
Bulletin
Rev1000 		ML 3.6 2023-04-23
15:28:06		 34.7793 15.1447 10 2024-03-01
17:18:10		 Bollettino Sismico Italiano INGV 117955881
Reviewed
Rev100 		ML 3.8 2023-04-23
15:28:04		 34.621 14.8888 10 2023-04-23
15:40:09		 Sala Sismica INGV-Roma 116653401
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-23 15:28:06 ± 0.46
Latitude 34.7793 ± 0.0342
Longitude 15.1447 ± 0.0372
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 117955881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 4800
Semi-minor axis of confidence ellipse (meter) 1720
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 41
Circular confidence region, given by single value of horizontal uncertainty (meter) 4800.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 313
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 1.17182
Epicentral distance of station farthest from the epicenter (degree) 4.74752
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:3.8

Field Value
Value 3.8
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 116653401
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-23 15:40:09

ML:3.6

Field Value
Value 3.6
Uncertainty 0.3
Num. used stations 38
Type of magnitude ML
Reference to an origin 117955881
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-02-09 15:28:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CELI.HNZ. 2023-04-23T15:29:18.48 0.6 undecidable manual P 13 526.9725 38 -0.31 16
IV.SERS.HHZ. 2023-04-23T15:29:13.91 0.3 undecidable manual P 16 491.7411 38 -0.49 24
IV.HMDC.HHZ. 2023-04-23T15:29:11.67 0.6 undecidable manual S 352 243.9669 38 0.9 29
IV.PLAC.HHZ. 2023-04-23T15:29:05.58 0.3 undecidable manual P 15 423.1542 38 -0.29 27
IV.MSRU.HHZ. 2023-04-23T15:29:01.42 0.3 undecidable manual P 5 387.9228 38 -0.06 29
IV.AIO.HHZ. 2023-04-23T15:28:57.37 0.3 undecidable manual P 1 354.1788 38 0.09 30
IV.GALF.HHZ. 2023-04-23T15:28:55.03 0.3 undecidable manual P 351 329.226 38 0.85 25
ML.XLND.BHE. 2023-04-23T15:28:51.51 0.6 undecidable manual S 329 162.2154 50 -0.9 47
IV.HLNI.HHZ. 2023-04-23T15:28:48.33 0.1 undecidable manual P 355 286.0026 38 -0.48 46
IV.RAFF.HHZ. 2023-04-23T15:28:48.84 0.3 undecidable manual P 346 279.9087 38 0.79 33
IV.CLTA.HHZ. 2023-04-23T15:28:48.97 0.3 undecidable manual P 338 284.4042 38 0.36 36
IV.HVZN.HHZ. 2023-04-23T15:28:47.25 0.6 undecidable manual P 352 268.9308 38 0.58 27
IV.HCRL.HHN. 2023-04-23T15:28:47.37 0.3 undecidable manual P 358 277.9107 38 -0.43 38
ML.MSDA.BHE. 2023-04-23T15:28:46.58 0.6 undecidable manual S 335 138.0618 50 0.61 58
IV.AGST.EHE. 2023-04-23T15:28:46.77 0.3 undecidable manual P 2 274.9137 38 -0.65 36
IV.SSY.HNN. 2023-04-23T15:28:45.62 0.3 undecidable manual P 359 263.9358 38 -0.43 44
IV.HVIT.HHZ. 2023-04-23T15:28:44.49 0.3 undecidable manual P 347 251.859 38 -0.06 52
IV.HSRS.HNN. 2023-04-23T15:28:44.99 0.3 undecidable manual P 2 256.7541 38 -0.17 49
IV.HMDC.HHZ. 2023-04-23T15:28:43.62 0.3 undecidable manual P 352 243.9669 38 0.05 56
IV.CROCE.HHE. 2023-04-23T15:28:43.54 0.3 undecidable manual P 347 234.2877 38 1.17 41
IV.HAVL.HHZ. 2023-04-23T15:28:43.01 0.3 undecidable manual P 360 241.8801 38 -0.3 54
MN.WDD.HHE. 2023-04-23T15:28:43.65 0.6 undecidable manual S 335 130.0698 50 -0.2 65
IV.HPAC.HHE. 2023-04-23T15:28:40.16 0.3 undecidable manual P 357 214.2189 38 0.29 65
ML.XLND.BHE. 2023-04-23T15:28:32.68 0.3 undecidable manual P 329 162.2154 50 -0.29 87
ML.MSDA.BHE. 2023-04-23T15:28:29.41 0.3 undecidable manual P 335 138.0618 50 0.16 97
MN.WDD.HHE. 2023-04-23T15:28:27.94 0.3 undecidable manual P 335 130.0698 50 -0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HMDC.HNE. ML:3.7 0.001075 0.36 AML other m 2023-04-23T15:29:14.57
IV.HAVL.HHE. ML:3.7 0.0011014999999999998 1.7 AML other m 2023-04-23T15:29:15.98
IV.HMDC.HHE. ML:3.4 0.0005585 0.26 AML other m 2023-04-23T15:29:16.30
IV.HAVL.HHN. ML:3.9 0.00147 1.28 AML other m 2023-04-23T15:29:16.15
IV.HMDC.HNN. ML:3.8 0.001365 0.72 AML other m 2023-04-23T15:29:16.92
IV.HMDC.HHN. ML:3.6 0.00074 0.72 AML other m 2023-04-23T15:29:16.92
IV.AGST.EHN. ML:3.9 0.0012749999999999999 0.42 AML other m 2023-04-23T15:29:22.41
IV.AGST.EHE. ML:3.8 0.00101 0.44 AML other m 2023-04-23T15:29:23.52
IV.SSY.HHE. ML:3.7 0.0007664999999999999 0.74 AML other m 2023-04-23T15:29:24.29
IV.SSY.HHN. ML:3.9 0.0014249999999999998 0.3 AML other m 2023-04-23T15:29:24.75
IV.SSY.HNN. ML:3.8 0.0010665 1.22 AML other m 2023-04-23T15:29:24.30
IV.SSY.HNE. ML:3.9 0.0012349999999999998 0.32 AML other m 2023-04-23T15:29:24.77
IV.HVZN.HHE. ML:4.0 0.001585 0.6 AML other m 2023-04-23T15:29:26.85
IV.HVZN.HHN. ML:3.8 0.0011459999999999999 0.86 AML other m 2023-04-23T15:29:28.84
IV.RAFF.HHN. ML:3.7 0.0008405 0.44 AML other m 2023-04-23T15:29:31.25
IV.RAFF.HNN. ML:3.3 0.000309 0.84 AML other m 2023-04-23T15:29:31.03
IV.RAFF.HNE. ML:3.4 0.00040449999999999997 1.18 AML other m 2023-04-23T15:29:31.25
IV.HLNI.HNE. ML:3.6 0.0006065 0.94 AML other m 2023-04-23T15:29:32.68
IV.RAFF.HHE. ML:3.5 0.0005434999999999999 1.08 AML other m 2023-04-23T15:29:32.24
IV.HLNI.HHE. ML:3.6 0.0006075 0.52 AML other m 2023-04-23T15:29:32.67
IV.HLNI.HNN. ML:3.6 0.0006065 0.9 AML other m 2023-04-23T15:29:33.64
IV.HLNI.HHN. ML:3.6 0.0005420000000000001 0.88 AML other m 2023-04-23T15:29:33.63
IV.CLTA.HHN. ML:2.9 0.0001085 1.08 AML other m 2023-04-23T15:29:40.06
IV.CLTA.HHE. ML:3.0 0.00015749999999999998 0.88 AML other m 2023-04-23T15:29:40.47
IV.AIO.HHN. ML:3.1 0.00011199999999999998 0.28 AML other m 2023-04-23T15:29:41.84
IV.GALF.HNE. ML:3.6 0.00036199999999999996 0.54 AML other m 2023-04-23T15:29:44.49
IV.GALF.HHE. ML:3.8 0.0005925 0.48 AML other m 2023-04-23T15:29:44.46
IV.AIO.HHE. ML:3.3 0.00017299999999999998 1.58 AML other m 2023-04-23T15:29:45.09
IV.GALF.HHN. ML:4.0 0.001064 0.76 AML other m 2023-04-23T15:29:47.47
IV.GALF.HNN. ML:3.7 0.0005105 0.78 AML other m 2023-04-23T15:29:47.47
IV.MSRU.HHN. ML:3.3 0.0001236 1.18 AML other m 2023-04-23T15:29:52.36
IV.MSRU.HHE. ML:3.4 0.000163 1.18 AML other m 2023-04-23T15:29:57.19
IV.PLAC.HHN. ML:3.0 0.000042999999999999995 0.42 AML other m 2023-04-23T15:30:01.11
IV.PLAC.HHE. ML:3.0 0.000056899999999999994 1.46 AML other m 2023-04-23T15:30:03.26
IV.SERS.HHE. ML:3.0 0.00003195 0.4 AML other m 2023-04-23T15:30:15.71
IV.SERS.HHN. ML:2.9 0.00002375 0.32 AML other m 2023-04-23T15:30:16.83
IV.CELI.HHE. ML:2.8 0.000015100000000000001 0.62 AML other m 2023-04-23T15:30:30.92
IV.CELI.HHN. ML:2.9 0.00001875 0.72 AML other m 2023-04-23T15:30:34.29
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