Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 25-02-2021 and time 15:30:12 (UTC) in region 4 km NE Gangi (PA)

A magnitude ML 1.8 earthquake occured in region: 4 km NE Gangi (PA), on

  • 25-02-2021 15:30:12 (UTC)
  • 25-02-2021 16:30:12 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.8260, 14.2320 at 8 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
Gangi PA 4 6811 6811
Geraci Siculo PA 8 1945 8756
Castel di Lucio ME 10 1294 10050
San Mauro Castelverde PA 11 1701 11751
Petralia Soprana PA 11 3360 15111
Petralia Sottana PA 12 2821 17932
Sperlinga EN 13 805 18737
Bompietro PA 15 1401 20138
Blufi PA 16 1029 21167
Mistretta ME 16 4791 25958
Pettineo ME 17 1350 27308
Nicosia EN 17 13899 41207
Castellana Sicula PA 17 3411 44618
Castelbuono PA 18 8943 53561
Tusa ME 18 2925 56486
Alimena PA 18 2032 58518
Motta d'Affermo ME 19 739 59257
Reitano ME 19 806 60063

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km NE of Caltanissetta (63360 inhabitants)
69 Km E of Bagheria (55387 inhabitants)
81 Km NE of Agrigento (59770 inhabitants)
83 Km E of Palermo (674435 inhabitants)
83 Km W of Catania (314555 inhabitants)
84 Km N of Gela (75827 inhabitants)
86 Km W of Acireale (52622 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 1.8 2021-02-25
15:30:12		 37.8257 14.2323 8 2021-07-12
16:55:12		 Bollettino Sismico Italiano INGV 90447791
Reviewed
Rev100 		ML 1.8 2021-02-25
15:30:12		 37.8243 14.2268 8 2021-02-25
15:38:56		 Sala Sismica INGV-Roma 87480301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-25 15:30:12 ± 0.1
Latitude 37.8257 ± 0.0063
Longitude 14.2323 ± 0.0137
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90447791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1161
Semi-minor axis of confidence ellipse (meter) 677
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 277
Circular confidence region, given by single value of horizontal uncertainty (meter) 1160.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 77
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.09263
Epicentral distance of station farthest from the epicenter (degree) 0.75183
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:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 21
Type of magnitude ML
Reference to an origin 90447791
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-24 11:22:33

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 21
Type of magnitude ML
Reference to an origin 87480301
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-25 15:38:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HVZN.HHZ. 2021-02-25T15:30:27.02 0.6 undecidable manual P 149 83.4498 50 -0.23 44
IV.GALF.HHZ. 2021-02-25T15:30:24.71 0.6 undecidable manual S 113 31.9458 105 0.64 43
IV.MUCR.HHZ. 2021-02-25T15:30:23.83 0.3 undecidable manual P 67 61.0944 50 0.03 69
IV.GIB.HHZ. 2021-02-25T15:30:21.44 0.6 undecidable manual S 315 25.6521 108 -0.53 45
IV.ALJA.HHZ. 2021-02-25T15:30:21.29 0.3 undecidable manual P 259 42.8238 50 0.31 65
IV.RESU.HHZ. 2021-02-25T15:30:21.67 0.6 undecidable manual S 218 25.1526 108 -0.11 49
IV.CSLB.HHZ. 2021-02-25T15:30:20.17 0.3 undecidable manual S 309 19.6692 113 0.15 74
IV.CAGR.HHE. 2021-02-25T15:30:20.03 0.6 undecidable manual P 134 32.5452 104 0.69 41
IV.PLLN.EHZ. 2021-02-25T15:30:20.63 0.6 undecidable manual S 337 20.0688 112 0.47 46
IV.MSFR.HHZ. 2021-02-25T15:30:20.02 0.3 undecidable manual P 54 39.0276 50 -0.38 69
IV.GALF.HHZ. 2021-02-25T15:30:19.06 0.3 undecidable manual P 113 31.9458 105 -0.17 71
IV.PETRA.HHZ. 2021-02-25T15:30:17.54 0.3 undecidable manual S 275 10.2786 129 0.33 74
IV.RESU.HHZ. 2021-02-25T15:30:17.68 0.3 undecidable manual P 218 25.1526 108 -0.23 72
IV.GIB.HHZ. 2021-02-25T15:30:17.86 0.3 undecidable manual P 315 25.6521 108 -0.15 73
IV.PLLN.EHZ. 2021-02-25T15:30:17.08 0.1 undecidable manual P 337 20.0688 112 0.11 100
IV.CSLB.HHZ. 2021-02-25T15:30:16.62 0.1 undecidable manual P 309 19.6692 113 -0.27 96
IV.PETRA.HHZ. 2021-02-25T15:30:15.17 0.1 positive manual P 275 10.2786 129 -0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PETRA.HHN. ML:2.0 0.001543 0.3 AML other m 2021-02-25T15:30:18.29
IV.PETRA.HHE. ML:2.1 0.0016400000000000002 0.22 AML other m 2021-02-25T15:30:18.18
IV.CSLB.HHE. ML:1.2 0.00013605 1.18 AML other m 2021-02-25T15:30:21.69
IV.CSLB.HHN. ML:1.4 0.00019250000000000002 1.26 AML other m 2021-02-25T15:30:22.67
IV.PLLN.EHE. ML:1.7 0.0003485 1.16 AML other m 2021-02-25T15:30:23.68
IV.GIB.HHE. ML:1.8 0.000345 1.46 AML other m 2021-02-25T15:30:25.00
IV.RESU.HHN. ML:2.0 0.0005880000000000001 0.82 AML other m 2021-02-25T15:30:25.81
IV.GIB.HHN. ML:1.9 0.0004855 0.42 AML other m 2021-02-25T15:30:26.69
IV.PLLN.EHN. ML:1.8 0.0004236535 0.6592 AML other m 2021-02-25T15:30:27.38
IV.MSFR.HHE. ML:1.4 0.0000776 1.68 AML other m 2021-02-25T15:30:28.87
IV.RESU.HHE. ML:1.7 0.0003075 0.3 AML other m 2021-02-25T15:30:28.11
IV.GALF.HHE. ML:2.0 0.0005290000000000001 0.52 AML other m 2021-02-25T15:30:31.92
IV.GALF.HHN. ML:2.1 0.0005935 0.52 AML other m 2021-02-25T15:30:32.07
IV.MSFR.HHN. ML:1.3 0.00007384999999999999 1.1 AML other m 2021-02-25T15:30:32.88
IV.ALJA.HHN. ML:1.4 0.00008669999999999999 1.42 AML other m 2021-02-25T15:30:32.91
IV.ALJA.HHE. ML:1.7 0.00014900000000000002 1.2 AML other m 2021-02-25T15:30:33.20
IV.MUCR.HHN. ML:1.6 0.00008165 0.38 AML other m 2021-02-25T15:30:36.61
IV.HVZN.HHE. ML:2.2 0.000185 0.82 AML other m 2021-02-25T15:30:41.68
IV.HVZN.HNE. ML:2.2 0.000183 1.1 AML other m 2021-02-25T15:30:41.82
IV.HVZN.HHN. ML:2.4 0.000325 0.6 AML other m 2021-02-25T15:30:41.62
IV.HVZN.HNN. ML:2.4 0.00032 0.6 AML other m 2021-02-25T15:30:41.62
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