Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.4 on date 18-03-2023 and time 22:31:19 (UTC) in region Tirreno Meridionale (MARE)

A magnitude ML 2.4 earthquake occured in region: Tirreno Meridionale (MARE), on

  • 18-03-2023 22:31:19 (UTC)
  • 18-03-2023 23:31:19 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.2310, 12.8450 at 31 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 2.4 2023-03-18
22:31:19		 40.2312 12.8453 31 2024-03-01
17:18:13		 Bollettino Sismico Italiano INGV 119555351
Reviewed
Rev100 		ML 2.4 2023-03-18
22:31:20		 40.2263 12.8258 39 2023-03-18
22:47:05		 Sala Sismica INGV-Roma 115519381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-18 22:31:19 ± 0.31
Latitude 40.2312 ± 0.0108
Longitude 12.8453 ± 0.0259
Depth (km) 31 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 119555351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1824
Semi-minor axis of confidence ellipse (meter) 1202
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 81
Circular confidence region, given by single value of horizontal uncertainty (meter) 1820.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 102
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 43
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.41
Epicentral distance of station closest to the epicenter (degree) 0.71316
Epicentral distance of station farthest from the epicenter (degree) 2.84815
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 35
Magnitudes information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.4
Num. used stations 36
Type of magnitude ML
Reference to an origin 119555351
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-12-19 13:25:20

ML:2.4

Field Value
Value 2.4
Uncertainty 0.4
Num. used stations 24
Type of magnitude ML
Reference to an origin 115519381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-18 22:47:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSLB.HHZ. 2023-03-18T22:32:26.70 0.6 undecidable manual S 157 275.0136 54 -0.9 18
IV.IFIL.HHZ. 2023-03-18T22:32:17.90 0.6 undecidable manual S 141 236.985 54 -1.51 19
IV.MTCE.HHZ. 2023-03-18T22:32:11.00 0.6 undecidable manual S 358 198.9453 54 -0.2 41
IV.MSRU.HHZ. 2023-03-18T22:32:04.37 0.3 undecidable manual P 133 316.1502 54 0.25 25
IV.CESI.HHZ. 2023-03-18T22:32:04.53 0.3 undecidable manual P 1 307.7586 54 1.46 15
IV.MPNC.HHZ. 2023-03-18T22:32:04.68 0.3 undecidable manual P 136 316.1502 54 0.56 23
IV.USI.HHE. 2023-03-18T22:32:03.10 0.6 undecidable manual S 170 171.3951 54 -2.16 17
IV.MUCR.HHZ. 2023-03-18T22:32:02.63 0.3 undecidable manual P 144 298.9785 54 0.65 23
IV.LIBRI.HHZ. 2023-03-18T22:32:02.20 0.3 undecidable manual P 142 298.0794 54 0.33 26
MN.VSL.HHZ. 2023-03-18T22:32:02.71 0.1 undecidable manual P 256 306.2601 54 -0.18 35
IV.MRVN.HHZ. 2023-03-18T22:32:01.99 0.3 undecidable manual P 71 296.5809 54 0.31 26
IV.GIUL.HHE. 2023-03-18T22:32:00.70 0.6 undecidable manual S 13 151.1376 54 -0.2 52
IV.CSLB.HHZ. 2023-03-18T22:31:59.97 0.1 undecidable manual P 157 275.0136 54 0.97 35
IV.CET2.HHZ. 2023-03-18T22:31:59.14 0.3 undecidable manual P 105 275.9127 54 0.03 35
IV.RM33.EHZ. 2023-03-18T22:31:58.22 0.6 undecidable manual P 7 254.5563 54 1.77 13
IV.LATB.EHE. 2023-03-18T22:31:57.30 0.6 undecidable manual S 4 140.4483 54 -1.29 36
IV.IFIL.HHZ. 2023-03-18T22:31:54.13 0.3 undecidable manual P 141 236.985 54 -0.14 48
IV.MGR.HHZ. 2023-03-18T22:31:52.97 0.3 undecidable manual P 92 229.6923 54 -0.4 48
IV.BULG.HHZ. 2023-03-18T22:31:51.37 0.3 undecidable manual P 94 215.3178 54 -0.21 55
IV.MTCE.HHZ. 2023-03-18T22:31:49.84 0.3 undecidable manual P 358 198.9453 54 0.31 59
IV.IFOR.HHE. 2023-03-18T22:31:49.20 0.6 undecidable manual S 58 100.5216 103 -0.59 52
IV.VVLD.HHZ. 2023-03-18T22:31:48.46 0.3 undecidable manual P 19 193.0623 54 -0.34 61
IV.CERT.HHE. 2023-03-18T22:31:48.21 0.6 undecidable manual P 3 190.8645 54 -0.32 42
IV.SGG.HNZ. 2023-03-18T22:31:48.34 0.3 undecidable manual P 45 181.6848 54 0.96 51
IV.RCAV.EHE. 2023-03-18T22:31:47.60 0.3 undecidable manual P 3 179.487 54 0.49 63
IV.CERA.HNN. 2023-03-18T22:31:47.05 0.6 undecidable manual P 33 180.6858 54 -0.21 45
IV.VAGA.HHZ. 2023-03-18T22:31:47.68 0.3 undecidable manual P 41 175.5909 54 1.05 51
IV.POFI.HNZ. 2023-03-18T22:31:47.43 0.3 undecidable manual P 23 180.1863 54 0.24 66
IV.USI.HHE. 2023-03-18T22:31:46.18 0.3 undecidable manual P 170 171.3951 54 0.08 72
IV.PAOL.HHN. 2023-03-18T22:31:45.84 0.6 undecidable manual P 58 169.9965 54 -0.08 49
IV.LRP.EHN. 2023-03-18T22:31:45.90 0.3 undecidable manual P 21 168.9087 54 0.1 72
IV.PIGN.HNE. 2023-03-18T22:31:44.06 0.3 undecidable manual P 46 155.3223 54 -0.05 79
IV.GIUL.HHE. 2023-03-18T22:31:43.35 0.3 undecidable manual P 13 151.1376 54 -0.23 77
IV.VENT.EHZ. 2023-03-18T22:31:41.68 0.6 undecidable manual S 38 79.1652 106 -2.6 11
IV.LATB.EHE. 2023-03-18T22:31:41.62 0.3 undecidable manual P 4 140.4483 54 -0.63 72
IV.CNIS.HNN. 2023-03-18T22:31:40.49 0.6 undecidable manual P 60 127.6722 54 -0.17 55
IV.IOCA.HHZ. 2023-03-18T22:31:40.30 1.0 undecidable manual P 57 105.9162 54 2.35 8
IV.SORR.HNN. 2023-03-18T22:31:40.51 0.3 undecidable manual P 72 131.7681 54 -0.67 72
IV.IMTC.HHE. 2023-03-18T22:31:38.72 0.3 undecidable manual P 58 102.5196 102 1.25 58
IV.IBCM.EHE. 2023-03-18T22:31:38.84 0.3 undecidable manual P 59 104.8173 54 1.02 64
IV.IFOR.HHE. 2023-03-18T22:31:37.83 0.6 undecidable manual P 58 100.5216 103 0.66 51
IV.ICVJ.EHN. 2023-03-18T22:31:37.82 0.3 undecidable manual P 57 105.2169 54 -0.05 89
IV.VENT.EHZ. 2023-03-18T22:31:33.20 0.1 undecidable manual P 38 79.1652 106 -0.78 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VENT.EHN. ML:2.9 0.00113 0.28 AML other m 2023-03-18T22:31:46.69
IV.VENT.EHE. ML:2.8 0.0007970000000000001 0.36 AML other m 2023-03-18T22:31:46.88
IV.LIBRI.HHN. ML:2.3 0.000026117469999999996 0.464 AML other m 2023-03-18T22:32:06.32
IV.BULG.HHN. ML:2.2 0.0000474 1.22 AML other m 2023-03-18T22:32:07.62
IV.CSLB.HNE. ML:2.5 0.0000508753 0.8704 AML other m 2023-03-18T22:32:09.82
IV.BULG.HHE. ML:2.0 0.000027005275000000002 0.2816 AML other m 2023-03-18T22:32:10.71
IV.MGR.HNN. ML:3.4 0.00062791325 1.4368 AML other m 2023-03-18T22:32:16.04
IV.MGR.HHE. ML:2.0 0.0000237 0.42 AML other m 2023-03-18T22:32:16.71
IV.RM33.EHN. ML:1.9 0.000013413395000000002 1.5136 AML other m 2023-03-18T22:32:21.04
IV.IFIL.HHE. ML:3.3 0.000442 0.16 AML other m 2023-03-18T22:32:21.48
IV.IFIL.HHN. ML:2.9 0.00015113925 0.1792 AML other m 2023-03-18T22:32:21.54
IV.CSLB.HHE. ML:2.1 0.000018692264999999998 0.2176 AML other m 2023-03-18T22:32:28.60
IV.CSLB.HHN. ML:2.1 0.000020749999999999996 0.98 AML other m 2023-03-18T22:32:30.79
IV.CSLB.HNN. ML:2.4 0.000042477535 1.1936 AML other m 2023-03-18T22:32:31.98
IV.MGR.HHN. ML:2.0 0.000020232134999999998 0.2816 AML other m 2023-03-18T22:32:32.68
IV.CET2.HHE. ML:2.1 0.0000202 0.8 AML other m 2023-03-18T22:32:32.84
IV.MPNC.HHE. ML:2.7 0.000055128705 1.2928 AML other m 2023-03-18T22:32:32.57
IV.MUCR.HHN. ML:2.3 0.00002719734 0.3328 AML other m 2023-03-18T22:32:34.25
IV.LIBRI.HNN. ML:2.8 0.00006947407499999999 0.2304 AML other m 2023-03-18T22:32:35.28
IV.BULG.HNE. ML:2.2 0.00004375719 1.0784 AML other m 2023-03-18T22:32:36.01
IV.BULG.HNN. ML:2.3 0.00005140159 0.448 AML other m 2023-03-18T22:32:36.38
MN.VSL.HHE. ML:2.8 0.00007577542 0.1664 AML other m 2023-03-18T22:32:36.56
MN.VSL.HHN. ML:2.6 0.000045487255000000004 0.1408 AML other m 2023-03-18T22:32:37.56
IV.CESI.HNN. ML:3.0 0.00010939299999999999 0.7936 AML other m 2023-03-18T22:32:39.45
IV.RM33.HNE. ML:3.0 0.0001844329 1.088 AML other m 2023-03-18T22:32:40.36
IV.MRVN.HHE. ML:1.6 0.0000060267225 1.216 AML other m 2023-03-18T22:32:42.62
IV.MGR.HNE. ML:3.4 0.0005608487 1.296 AML other m 2023-03-18T22:32:45.22
IV.MRVN.HHN. ML:1.6 0.0000071445005 1.04 AML other m 2023-03-18T22:32:46.28
IV.RM33.EHE. ML:1.9 0.0000170408135 0.64 AML other m 2023-03-18T22:32:46.14
IV.CET2.HHN. ML:2.3 0.00003025 0.88 AML other m 2023-03-18T22:32:48.50
IV.RM33.HNN. ML:3.0 0.00016563654999999998 0.9216 AML other m 2023-03-18T22:32:53.00
IV.MSRU.HHN. ML:2.6 0.000037928045 0.9088 AML other m 2023-03-18T22:32:54.90
IV.CESI.HHN. ML:1.9 0.000008356203 0.7296 AML other m 2023-03-18T22:32:55.61
IV.MPNC.HHN. ML:2.6 0.000046977935 0.6784 AML other m 2023-03-18T22:32:58.14
IV.MSRU.HHE. ML:2.7 0.000051047764999999994 1.2416 AML other m 2023-03-18T22:32:59.85
IV.LIBRI.HHE. ML:2.2 0.00001998962 0.4768 AML other m 2023-03-18T22:33:01.53
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
Waveforms Seismic signals in miniseed + resp format Download