Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 26-02-2021 and time 19:45:41 (Italy) in region 3 km NE Gangi (PA)

A magnitude ML 1.6 earthquake occured in region: 3 km NE Gangi (PA), on

  • 26-02-2021 18:45:41 (UTC)
  • 26-02-2021 19:45:41 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.8220, 14.2290 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 3 6811 6811
Geraci Siculo PA 8 1945 8756
Castel di Lucio ME 10 1294 10050
Petralia Soprana PA 11 3360 13410
San Mauro Castelverde PA 11 1701 15111
Petralia Sottana PA 12 2821 17932
Sperlinga EN 13 805 18737
Bompietro PA 14 1401 20138
Blufi PA 15 1029 21167
Castellana Sicula PA 17 3411 24578
Mistretta ME 17 4791 29369
Nicosia EN 17 13899 43268
Pettineo ME 17 1350 44618
Alimena PA 18 2032 46650
Castelbuono PA 18 8943 55593
Tusa ME 18 2925 58518
Motta d'Affermo ME 19 739 59257
Reitano ME 20 806 60063

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km NE of Caltanissetta (63360 inhabitants)
69 Km E of Bagheria (55387 inhabitants)
80 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 1.6 2021-02-26
18:45:41		 37.8218 14.2292 8 2021-07-12
16:55:01		 Bollettino Sismico Italiano INGV 87945621
Reviewed
Rev100 		ML 1.7 2021-02-26
18:45:42		 37.8043 14.1877 10 2021-02-26
18:50:51		 Sala Sismica INGV-Roma 87518241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-26 18:45:41 ± 0.12
Latitude 37.8218 ± 0.0081
Longitude 14.2292 ± 0.0102
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 87945621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 827
Semi-minor axis of confidence ellipse (meter) 729
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 15
Circular confidence region, given by single value of horizontal uncertainty (meter) 830.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 47
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0.09083
Epicentral distance of station farthest from the epicenter (degree) 0.79050
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 87518241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-26 18:50:51

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 87945621
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-16 16:40:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.IFIL.HHN. 2021-02-26T18:45:57.68 0.6 undecidable manual P 20 87.7455 50 0.58 38
IV.MSFR.HHE. 2021-02-26T18:45:55.61 0.6 undecidable manual S 53 39.5271 50 0.16 46
IV.RAFF.HHZ. 2021-02-26T18:45:54.15 0.3 undecidable manual P 170 67.4769 50 0.16 66
IV.MUCR.HHE. 2021-02-26T18:45:53.01 0.3 undecidable manual P 66 61.494 50 -0.05 68
IV.CPTP.HHZ. 2021-02-26T18:45:52.17 0.3 undecidable manual P 187 46.3203 50 1.45 41
IV.GALF.HHZ. 2021-02-26T18:45:52.36 1.0 undecidable manual S 113 32.0457 104 -0.88 19
IV.GIB.HHZ. 2021-02-26T18:45:51.59 0.6 undecidable manual S 316 25.752 107 0.45 45
IV.RESU.HHZ. 2021-02-26T18:45:50.67 1.0 undecidable manual S 218 24.5532 108 -0.08 24
IV.SCIAR.HHZ. 2021-02-26T18:45:49.93 0.1 undecidable manual P 288 44.0226 50 -0.44 87
IV.MSFR.HHE. 2021-02-26T18:45:49.27 0.3 undecidable manual P 53 39.5271 50 -0.39 66
IV.PLLN.EHZ. 2021-02-26T18:45:49.96 1.0 undecidable manual S 338 20.3685 112 0.58 22
IV.CAGR.HHZ. 2021-02-26T18:45:49.10 0.3 undecidable manual P 133 32.4453 104 0.62 63
IV.ALJA.HHZ. 2021-02-26T18:45:49.83 0.6 undecidable manual P 259 42.4242 50 -0.3 45
IV.CSLB.HHZ. 2021-02-26T18:45:49.28 0.3 undecidable manual S 311 19.7691 112 0.11 73
IV.GALF.HHZ. 2021-02-26T18:45:48.07 0.3 undecidable manual P 113 32.0457 104 -0.32 68
IV.PETRA.HHZ. 2021-02-26T18:45:46.70 0.6 undecidable manual S 277 10.0788 129 0.45 46
IV.RESU.HHZ. 2021-02-26T18:45:46.47 0.3 undecidable manual P 218 24.5532 108 -0.49 67
IV.GIB.HHZ. 2021-02-26T18:45:46.84 0.3 undecidable manual P 316 25.752 107 -0.34 69
IV.PLLN.EHZ. 2021-02-26T18:45:46.34 0.3 undecidable manual P 338 20.3685 112 0.18 72
IV.CSLB.HHZ. 2021-02-26T18:45:45.72 0.1 undecidable manual P 311 19.7691 112 -0.32 93
IV.PETRA.HHZ. 2021-02-26T18:45:44.31 0.1 undecidable manual P 277 10.0788 129 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PETRA.HHE. ML:2.0 0.0015858245000000002 0.2048 AML other m 2021-02-26T18:45:47.25
IV.PETRA.HHN. ML:1.9 0.0011606415000000002 0.3072 AML other m 2021-02-26T18:45:48.55
IV.SCIAR.HHE. ML:1.6 0.000111978125 0.3072 AML other m 2021-02-26T18:45:50.93
IV.GALF.HNN. ML:1.5 0.00015212289 0.8704 AML other m 2021-02-26T18:45:51.07
IV.CSLB.HHN. ML:1.2 0.00012948585 0.2816 AML other m 2021-02-26T18:45:51.49
IV.PLLN.EHN. ML:1.8 0.0004915000000000001 0.26 AML other m 2021-02-26T18:45:51.54
IV.CSLB.HHE. ML:1.1 0.00009209999999999999 1.3 AML other m 2021-02-26T18:45:51.73
IV.PLLN.EHE. ML:1.8 0.00043213179999999993 0.5376 AML other m 2021-02-26T18:45:52.22
IV.RESU.HHN. ML:1.8 0.00036899999999999997 0.56 AML other m 2021-02-26T18:45:56.47
IV.RESU.HHE. ML:1.5 0.00021384930000000003 0.3584 AML other m 2021-02-26T18:45:56.29
IV.GALF.HNE. ML:1.4 0.00010768715499999999 0.576 AML other m 2021-02-26T18:45:57.61
IV.ALJA.HHN. ML:1.3 0.00007043491 0.2816 AML other m 2021-02-26T18:46:00.61
IV.ALJA.HHE. ML:1.5 0.00010389999999999999 0.3 AML other m 2021-02-26T18:46:00.75
IV.GALF.HHE. ML:2.0 0.00043829045 0.5376 AML other m 2021-02-26T18:46:01.21
IV.SCIAR.HNE. ML:1.7 0.0001429525 0.8576 AML other m 2021-02-26T18:46:02.13
IV.SCIAR.HNN. ML:1.8 0.00020921014999999998 0.7936 AML other m 2021-02-26T18:46:01.88
IV.GALF.HHN. ML:1.9 0.00033882045 0.6528 AML other m 2021-02-26T18:46:04.30
IV.SCIAR.HHN. ML:1.4 0.000076069085 0.32 AML other m 2021-02-26T18:46:05.43
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