Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 01-10-2021 and time 11:44:31 (Italy) in region 6 km E Gangi (PA)

A magnitude ML 0.9 earthquake occured in region: 6 km E Gangi (PA), on

  • 01-10-2021 09:44:31 (UTC)
  • 01-10-2021 11:44:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8180, 14.2740 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 6 6811 6811
Castel di Lucio ME 9 1294 8105
Sperlinga EN 9 805 8910
Geraci Siculo PA 12 1945 10855
San Mauro Castelverde PA 13 1701 12556
Nicosia EN 13 13899 26455
Petralia Soprana PA 15 3360 29815
Mistretta ME 15 4791 34606
Petralia Sottana PA 16 2821 37427
Pettineo ME 17 1350 38777
Bompietro PA 17 1401 40178
Reitano ME 18 806 40984
Capizzi ME 18 3176 44160
Motta d'Affermo ME 18 739 44899
Blufi PA 19 1029 45928
Tusa ME 19 2925 48853
Alimena PA 20 2032 50885

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km NE of Caltanissetta (63360 inhabitants)
73 Km E of Bagheria (55387 inhabitants)
80 Km W of Catania (314555 inhabitants)
82 Km W of Acireale (52622 inhabitants)
83 Km NE of Agrigento (59770 inhabitants)
84 Km N of Gela (75827 inhabitants)
87 Km E of Palermo (674435 inhabitants)
99 Km N of Vittoria (63339 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
Reviewed
Rev100 		ML 0.9 2021-10-01
09:44:31		 37.8182 14.274 10 2021-10-01
09:57:30		 Sala Sismica INGV-Roma 96096541
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-01 09:44:31 ± 0.15
Latitude 37.8182 ± 0.0081
Longitude 14.2740 ± 0.0102
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96096541

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 990
Semi-minor axis of confidence ellipse (meter) 701
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 218
Circular confidence region, given by single value of horizontal uncertainty (meter) 990.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 143
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.12680
Epicentral distance of station farthest from the epicenter (degree) 0.51891
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 96096541
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-01 09:57:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ESML.HHZ. 2021-10-01T09:44:42.13 0.1 undecidable manual P 112 57.5979 50 -0.14 94
IV.GIB.HHZ. 2021-10-01T09:44:42.20 0.3 undecidable manual S 311 28.8489 50 -0.04 76
IV.RESU.HHZ. 2021-10-01T09:44:41.90 0.6 undecidable manual S 225 26.9508 50 0.19 49
IV.CSLB.HHZ. 2021-10-01T09:44:40.00 0.6 undecidable manual S 305 23.0547 114 -0.59 45
IV.GIB.HHZ. 2021-10-01T09:44:38.14 0.6 positive manual P 311 28.8489 50 0.3 48
IV.PETRA.HHZ. 2021-10-01T09:44:37.80 0.3 undecidable manual S 277 14.0748 126 -0.04 78
IV.RESU.HHZ. 2021-10-01T09:44:37.19 0.6 positive manual P 225 26.9508 50 -0.35 47
IV.PLLN.EHE. 2021-10-01T09:44:36.97 0.1 undecidable manual P 329 22.4553 114 0.19 99
IV.CSLB.HHZ. 2021-10-01T09:44:36.82 1.0 undecidable manual P 305 23.0547 114 -0.07 25
IV.PETRA.HHZ. 2021-10-01T09:44:35.51 0.1 positive manual P 277 14.0748 126 0.2 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PETRA.HHN. ML:0.0 0.000082642065 0.1792 AML other m 2021-10-01T09:44:38.44
IV.PETRA.HHE. ML:0.0 0.00012318645 0.2432 AML other m 2021-10-01T09:44:39.91
IV.CSLB.HHE. ML:0.4 0.000014325565 0.32 AML other m 2021-10-01T09:44:41.64
IV.CSLB.HHN. ML:0.6 0.00002335073 0.3584 AML other m 2021-10-01T09:44:39.80
IV.RESU.HHE. ML:1.1 0.00006497084 0.4416 AML other m 2021-10-01T09:44:44.75
IV.RESU.HHN. ML:1.3 0.00009932013 0.4608 AML other m 2021-10-01T09:44:42.29
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