Earthquake with magnitude of ML 2.0 on date 23-04-2021 and time 21:12:24 (UTC) in region 3 km NW Salaparuta (TP)

A magnitude ML 2.0 earthquake occured in region: 3 km NW Salaparuta (TP), on

  • 23-04-2021 21:12:24 (UTC)
  • 23-04-2021 23:12:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.773, 12.979 at 13 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Salaparuta TP 3 1696 1696
Poggioreale TP 5 1494 3190
Montevago AG 8 3006 6196
Santa Ninfa TP 9 5043 11239
Partanna TP 10 10607 21846
Santa Margherita di Belice AG 10 6363 28209
Gibellina TP 10 4115 32324
Salemi TP 16 10794 43118
Roccamena PA 17 1505 44623
Camporeale PA 17 3373 47996
Vita TP 18 2056 50052
Sambuca di Sicilia AG 18 5877 55929
Contessa Entellina PA 19 1766 57695
Calatafimi-Segesta TP 19 6712 64407
Castelvetrano TP 19 31806 96213
Menfi AG 19 12592 108805

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Mazara del Vallo (51718 inhabitants)
48 Km E of Marsala (83194 inhabitants)
49 Km SE of Trapani (68759 inhabitants)
51 Km SW of Palermo (674435 inhabitants)
58 Km SW of Bagheria (55387 inhabitants)
74 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 2.0 2021-04-23
21:12:24
37.7732 12.979 13 2021-07-12
16:55:15
Bollettino Sismico Italiano INGV 91373911
Reviewed
Rev100
ML 1.9 2021-04-23
21:12:25
37.82 12.9257 4 2021-04-23
21:28:15
Sala Sismica INGV-Roma 89414521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-23 21:12:24 ± 0.2
Latitude 37.7732 ± 0.0108
Longitude 12.9790 ± 0.0148
Depth (km) 13 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91373911

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1481
Semi-minor axis of confidence ellipse (meter) 503
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 226
Circular confidence region, given by single value of horizontal uncertainty (meter) 1480
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 86
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.03507
Epicentral distance of station farthest from the epicenter (degree) 0.61244
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:2

Field Value
Value 2
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 91373911
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-16 13:58:23

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 89414521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-23 21:28:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ALJA.HHZ. 2021-04-23T21:12:39.18 0.3 undecidable manual P 92 0.6124 92 2.85 9
IV.MARS.EHZ. 2021-04-23T21:12:37.84 0.6 undecidable manual S 267 0.3283 95 1.22 32
IV.LEVAN.EHZ. 2021-04-23T21:12:36.62 0.3 undecidable manual P 294 0.545 92 1.44 41
IV.SOLUN.HHZ. 2021-04-23T21:12:35.44 1.0 undecidable manual P 54 0.5405 92 0.34 22
MN.CLTB.HHN. 2021-04-23T21:12:35.30 0.3 undecidable manual S 136 0.2707 97 0.37 69
IV.SCIAC.HHN. 2021-04-23T21:12:34.96 0.6 undecidable manual S 159 0.2743 96 -0.08 48
IV.MPG.HHE. 2021-04-23T21:12:34.98 1.0 undecidable manual P 38 0.491 93 0.73 20
IV.MTGR.HHZ. 2021-04-23T21:12:32.74 0.3 undecidable manual S 305 0.2113 100 -0.44 68
IV.MARS.EHZ. 2021-04-23T21:12:31.82 0.1 undecidable manual P 267 0.3283 95 0.35 91
IV.MBFT.HHZ. 2021-04-23T21:12:31.28 0.3 undecidable manual S 353 0.1745 105 -0.84 59
IV.SCIAC.HHN. 2021-04-23T21:12:30.27 0.1 negative manual P 159 0.2743 96 -0.28 92
MN.CLTB.HHN. 2021-04-23T21:12:30.29 0.1 negative manual P 136 0.2707 97 -0.2 94
IV.MTGR.HHZ. 2021-04-23T21:12:29.19 0.1 undecidable manual P 305 0.2113 100 -0.3 93
IV.CRJA.HHZ. 2021-04-23T21:12:29.34 0.3 undecidable manual S 35 0.0351 159 0.37 71
IV.MMGO.HHN. 2021-04-23T21:12:29.81 0.3 undecidable manual S 181 0.1115 123 -0.6 67
IV.MBFT.HHZ. 2021-04-23T21:12:28.51 0.1 negative manual P 353 0.1745 105 -0.36 93
IV.MMGO.HHN. 2021-04-23T21:12:27.71 0.1 positive manual P 181 0.1115 123 -0.17 98
IV.CRJA.HHZ. 2021-04-23T21:12:27.20 0.1 undecidable manual P 35 0.0351 159 0.15 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRJA.HHN. ML:2.5 0.0042806065 0.1408 AML other m 2021-04-23T21:12:28.28
IV.CRJA.HHE. ML:2.6 0.006044636 0.0768 AML other m 2021-04-23T21:12:28.49
IV.MBFT.HHN. ML:1.8 0.00046385255 0.3584 AML other m 2021-04-23T21:12:31.67
IV.MBFT.HHE. ML:1.9 0.000599 1.14 AML other m 2021-04-23T21:12:32.74
IV.MTGR.HHN. ML:1.9 0.0004381322 0.1536 AML other m 2021-04-23T21:12:34.30
IV.SOLUN.HHN. ML:1.9 0.0001555 0.96 AML other m 2021-04-23T21:12:49.92
IV.SOLUN.HHE. ML:2 0.0001915 0.36 AML other m 2021-04-23T21:12:50.44
IV.LEVAN.EHN. ML:1.8 0.0001224 0.48 AML other m 2021-04-23T21:12:50.46
IV.ALJA.HHE. ML:2 0.000161 0.6 AML other m 2021-04-23T21:12:57.70
IV.ALJA.HHN. ML:1.8 0.00010065 1.44 AML other m 2021-04-23T21:12:58.82
IV.GIB.HHN. ML:0 0.0002525 0.44 AML other m 2021-04-23T21:12:58.74
IV.CSLB.HHE. ML:0 9.575E-5 0.38 AML other m 2021-04-23T21:13:00.28
IV.CSLB.HHN. ML:0 0.00010355 0.92 AML other m 2021-04-23T21:13:00.35
IV.PLLN.EHE. ML:0 0.0002105 1.16 AML other m 2021-04-23T21:13:05.38
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