Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.5 on date 20-09-2022 and time 02:51:53 (Italy) in region 7 km S Alcamo (TP)

A magnitude ML 2.5 earthquake occured in region: 7 km S Alcamo (TP), on

  • 20-09-2022 00:51:53 (UTC)
  • 20-09-2022 02:51:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.9220, 12.9870 at 9 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Alcamo TP 7 45307 45307
Camporeale PA 10 3373 48680
Calatafimi-Segesta TP 11 6712 55392
Balestrate PA 15 6436 61828
Castellammare del Golfo TP 15 15394 77222
Gibellina TP 16 4115 81337
Vita TP 16 2056 83393
Trappeto PA 17 3174 86567
Roccamena PA 17 1505 88072
San Cipirello PA 18 5372 93444
San Giuseppe Jato PA 18 8650 102094
Partinico PA 18 32079 134173
Poggioreale TP 18 1494 135667
Salaparuta TP 18 1696 137363
Santa Ninfa TP 19 5043 142406
Borgetto PA 20 7419 149825
Salemi TP 20 10794 160619

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km SW of Palermo (674435 inhabitants)
43 Km E of Trapani (68759 inhabitants)
46 Km NE of Mazara del Vallo (51718 inhabitants)
49 Km W of Bagheria (55387 inhabitants)
50 Km E of Marsala (83194 inhabitants)
86 Km NW of Agrigento (59770 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 2.5 2022-09-20
00:51:53		 37.9223 12.9872 9 2024-03-01
15:28:08		 Bollettino Sismico Italiano INGV 112517731
Reviewed
Rev100 		ML 2.5 2022-09-20
00:51:53		 37.909 12.999 6 2022-09-20
00:58:22		 Sala Sismica INGV-Roma 109911491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-09-20 00:51:53 ± 0.1
Latitude 37.9223 ± 0.0063
Longitude 12.9872 ± 0.0068
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 112517731

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 669
Semi-minor axis of confidence ellipse (meter) 489
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 171
Circular confidence region, given by single value of horizontal uncertainty (meter) 670.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 59
Number of associated phases, regardless of their use for origin computation 37
Number of defining phases 37
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.03597
Epicentral distance of station farthest from the epicenter (degree) 3.22407
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 27
Magnitudes information

ML:2.5

Field Value
Value 2.5
Uncertainty 0.2
Num. used stations 46
Type of magnitude ML
Reference to an origin 112517731
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-04-11 14:34:09

ML:2.5

Field Value
Value 2.5
Uncertainty 0.2
Num. used stations 46
Type of magnitude ML
Reference to an origin 109911491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-09-20 00:58:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
MN.VSL.HHZ. 2022-09-20T00:52:45.01 0.3 undecidable manual P 300 357.8751 38 -0.41 0
IV.CET2.HHZ. 2022-09-20T00:52:39.86 0.6 undecidable manual P 54 312.5538 38 0.08 0
IV.HVZN.HHZ. 2022-09-20T00:52:23.70 0.3 undecidable manual P 118 172.9935 50 1.43 0
IV.HLNI.HHZ. 2022-09-20T00:52:23.85 0.3 undecidable manual P 110 177.3891 50 0.9 0
IV.RAFF.HHZ. 2022-09-20T00:52:20.05 0.3 undecidable manual P 122 143.6451 50 2.29 0
IV.GALF.HHZ. 2022-09-20T00:52:19.63 0.6 undecidable manual P 99 140.3484 50 2.38 0
IV.MSFR.HHZ. 2022-09-20T00:52:18.26 0.6 undecidable manual P 84 140.8479 50 0.94 0
IV.CLTA.HHZ. 2022-09-20T00:52:17.02 0.3 undecidable manual P 134 120.5904 50 2.83 0
IV.CPTP.HHZ. 2022-09-20T00:52:17.76 0.6 undecidable manual P 119 117.993 50 3.97 0
IV.PLLN.EHZ. 2022-09-20T00:52:12.70 0.3 undecidable manual P 85 101.4207 50 1.46 0
IV.LEVAN.EHZ. 2022-09-20T00:52:12.92 0.6 undecidable manual S 278 56.5989 50 0.93 36
IV.FAVA.HHE. 2022-09-20T00:52:12.95 0.6 undecidable manual P 138 88.4448 50 3.7 0
IV.CSLB.HHZ. 2022-09-20T00:52:11.09 0.3 undecidable manual P 89 93.7395 50 1.04 2
IV.GIB.HHZ. 2022-09-20T00:52:11.10 0.3 undecidable manual P 85 91.1421 50 1.44 3
IV.USI.HHZ. 2022-09-20T00:52:10.70 0.3 undecidable manual P 11 88.7445 50 1.42 5
IV.SCIAC.HHZ. 2022-09-20T00:52:09.07 0.6 undecidable manual S 167 46.1205 50 -0.12 49
IV.MARS.HHZ. 2022-09-20T00:52:07.40 0.6 undecidable manual S 243 41.5251 50 -0.55 45
IV.MARIO.HHE. 2022-09-20T00:52:07.46 0.6 undecidable manual S 85 39.1275 50 0.13 49
IV.ALJA.HHZ. 2022-09-20T00:52:07.75 0.3 undecidable manual P 106 69.8745 50 1.37 30
IV.ERC.EHZ. 2022-09-20T00:52:06.11 0.6 undecidable manual S 290 37.2294 50 -0.7 42
IV.LEVAN.EHZ. 2022-09-20T00:52:05.06 0.3 undecidable manual P 278 56.5989 50 0.72 60
IV.CAVT.HHZ. 2022-09-20T00:52:05.96 0.6 undecidable manual S 217 33.744 50 0.07 50
IV.MMGO.HNZ. 2022-09-20T00:52:03.90 0.6 undecidable manual S 182 28.9488 107 -0.46 46
IV.SOLUN.HHZ. 2022-09-20T00:52:03.22 0.3 undecidable manual P 68 51.2154 50 -0.29 71
IV.MPG.HHZ. 2022-09-20T00:52:02.07 0.3 undecidable manual P 51 42.0246 50 -0.02 76
IV.MARS.HHZ. 2022-09-20T00:52:02.09 0.1 undecidable manual P 243 41.5251 50 0.09 100
IV.SCIAC.HHZ. 2022-09-20T00:52:02.34 0.1 negative manual P 167 46.1205 50 -0.38 94
IV.ERC.EHZ. 2022-09-20T00:52:01.45 0.3 undecidable manual P 290 37.2294 50 0.1 74
IV.MFNL.HHZ. 2022-09-20T00:52:01.00 0.6 undecidable manual S 201 15.6732 119 0.9 39
IV.MARIO.HHE. 2022-09-20T00:52:01.35 0.1 undecidable manual P 85 39.1275 50 -0.3 95
IV.MTGR.HHZ. 2022-09-20T00:52:01.00 0.6 undecidable manual S 261 20.1687 113 -0.51 45
IV.CAVT.HHZ. 2022-09-20T00:52:00.66 0.1 positive manual P 217 33.744 50 -0.16 98
IV.MMGO.HNZ. 2022-09-20T00:51:59.71 0.1 undecidable manual P 182 28.9488 107 -0.22 97
IV.MTGR.HHZ. 2022-09-20T00:51:58.23 0.1 positive manual P 261 20.1687 113 -0.06 100
IV.MFNL.HHZ. 2022-09-20T00:51:58.10 0.1 undecidable manual P 201 15.6732 119 0.63 87
IV.MBFT.HHZ. 2022-09-20T00:51:56.70 0.6 undecidable manual S 312 3.996 156 -0.5 46
IV.MBFT.HHZ. 2022-09-20T00:51:55.87 0.1 undecidable manual P 312 3.996 156 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTGR.HHN. ML:2.6 0.002785 0.5 AML other m 2022-09-20T00:52:01.13
IV.MFNL.HHE. ML:3.0 0.00992 0.22 AML other m 2022-09-20T00:52:01.31
IV.MFNL.HHN. ML:3.0 0.01024 0.14 AML other m 2022-09-20T00:52:01.30
IV.MTGR.HHE. ML:2.1 0.0010455 0.86 AML other m 2022-09-20T00:52:01.44
IV.MMGO.HNE. ML:2.8 0.0032949999999999998 0.38 AML other m 2022-09-20T00:52:04.08
IV.MMGO.HHE. ML:2.8 0.0033150000000000002 0.38 AML other m 2022-09-20T00:52:04.08
IV.MMGO.HNN. ML:2.7 0.0028250000000000003 0.14 AML other m 2022-09-20T00:52:04.71
IV.MMGO.HHN. ML:2.7 0.0027649999999999997 0.12 AML other m 2022-09-20T00:52:04.72
IV.CAVT.HHN. ML:2.6 0.00155 0.26 AML other m 2022-09-20T00:52:06.33
IV.CAVT.HNN. ML:2.2 0.0007894999999999999 0.26 AML other m 2022-09-20T00:52:06.33
IV.CAVT.HHE. ML:2.6 0.0015149999999999999 1.32 AML other m 2022-09-20T00:52:06.08
IV.CAVT.HNE. ML:2.2 0.0007315 0.18 AML other m 2022-09-20T00:52:07.09
IV.ERC.EHN. ML:2.5 0.001195 0.94 AML other m 2022-09-20T00:52:09.60
IV.SCIAC.HHE. ML:2.6 0.0011295 0.42 AML other m 2022-09-20T00:52:09.83
IV.SCIAC.HNE. ML:2.6 0.0011505 1.1 AML other m 2022-09-20T00:52:10.84
IV.ERC.EHE. ML:2.4 0.001045 0.9 AML other m 2022-09-20T00:52:10.52
IV.SCIAC.HHN. ML:2.5 0.0010165 0.56 AML other m 2022-09-20T00:52:10.44
IV.MPG.HHE. ML:2.1 0.00039249999999999995 1.06 AML other m 2022-09-20T00:52:10.19
IV.SCIAC.HNN. ML:2.5 0.001029 0.56 AML other m 2022-09-20T00:52:10.45
IV.MARS.HHE. ML:2.4 0.0009025 1.38 AML other m 2022-09-20T00:52:14.94
IV.MARS.HNE. ML:2.4 0.0008835 1.38 AML other m 2022-09-20T00:52:14.94
IV.LEVAN.EHE. ML:2.5 0.000765 1.18 AML other m 2022-09-20T00:52:15.36
IV.LEVAN.EHN. ML:2.5 0.000704 1.54 AML other m 2022-09-20T00:52:16.88
IV.MPG.HHN. ML:2.1 0.000384 0.36 AML other m 2022-09-20T00:52:16.31
IV.SOLUN.HHN. ML:2.5 0.000841 0.3 AML other m 2022-09-20T00:52:16.51
IV.MARS.HNN. ML:2.3 0.0006985 0.68 AML other m 2022-09-20T00:52:17.42
IV.MARS.HHN. ML:2.3 0.0006925 0.66 AML other m 2022-09-20T00:52:17.42
IV.SOLUN.HHE. ML:2.3 0.000549 0.84 AML other m 2022-09-20T00:52:19.77
IV.ALJA.HHN. ML:2.4 0.0004045 1.52 AML other m 2022-09-20T00:52:25.01
IV.ALJA.HHE. ML:2.5 0.0005935 0.44 AML other m 2022-09-20T00:52:26.01
IV.CSLB.HHN. ML:2.0 0.0001142 0.98 AML other m 2022-09-20T00:52:27.61
IV.USI.HHE. ML:2.5 0.00034250000000000003 0.36 AML other m 2022-09-20T00:52:27.96
IV.USI.HHN. ML:3.0 0.00117 1.32 AML other m 2022-09-20T00:52:28.78
IV.CSLB.HHE. ML:2.1 0.00013550000000000001 1.48 AML other m 2022-09-20T00:52:31.04
IV.GIB.HHN. ML:2.5 0.0003815 0.82 AML other m 2022-09-20T00:52:31.87
IV.GIB.HHE. ML:2.6 0.000442 0.68 AML other m 2022-09-20T00:52:33.57
IV.PLLN.EHE. ML:2.5 0.00033600000000000004 0.62 AML other m 2022-09-20T00:52:37.19
IV.PLLN.EHN. ML:2.7 0.0005455 0.74 AML other m 2022-09-20T00:52:41.42
IV.RAFF.HHE. ML:2.5 0.0001595 0.56 AML other m 2022-09-20T00:52:45.63
IV.RAFF.HHN. ML:2.3 0.00012050000000000002 0.6 AML other m 2022-09-20T00:52:48.00
IV.HLNI.HHN. ML:2.4 0.00010489999999999999 1.2 AML other m 2022-09-20T00:52:50.87
IV.HLNI.HHE. ML:2.3 0.00008085 1.24 AML other m 2022-09-20T00:52:51.67
IV.HVZN.HHE. ML:3.1 0.000491 1.18 AML other m 2022-09-20T00:52:54.81
IV.HVZN.HNE. ML:3.1 0.00046550000000000004 1.18 AML other m 2022-09-20T00:52:54.82
IV.HVZN.HNN. ML:3.0 0.00036449999999999997 1.4 AML other m 2022-09-20T00:52:58.10
IV.HVZN.HHN. ML:3.0 0.000363 1.44 AML other m 2022-09-20T00:52:58.81
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