Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 07-03-2021 and time 09:59:18 (UTC) in region 4 km NE Gangi (PA)

A magnitude ML 1.2 earthquake occured in region: 4 km NE Gangi (PA), on

  • 07-03-2021 09:59:18 (UTC)
  • 07-03-2021 10:59:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.83, 14.23 at 11 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 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 14 1401 20138
Blufi PA 16 1029 21167
Mistretta ME 17 4791 25958
Pettineo ME 17 1350 27308
Castellana Sicula PA 17 3411 30719
Nicosia EN 17 13899 44618
Castelbuono PA 17 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)
84 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
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.2 2021-03-07
09:59:18		 37.83 14.23 11 2021-03-07
10:04:26		 Sala Sismica INGV-Roma 87866851
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-07 09:59:18 ± 0.33
Latitude 37.83 ± 0.01
Longitude 14.23 ± 0.02
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87866851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2000
Semi-minor axis of confidence ellipse (meter) 750
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 262
Circular confidence region, given by single value of horizontal uncertainty (meter) 2000
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 262
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.09173
Epicentral distance of station farthest from the epicenter (degree) 0.23023
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 87866851
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-07 10:04:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RESU.HHZ. 2021-03-07T09:59:27.65 0.3 undecidable manual S 218 0.2257 50 0.08 74
IV.CSLB.HHZ. 2021-03-07T09:59:25.91 0.3 undecidable manual S 309 0.1763 50 -0.21 73
IV.GIB.HHZ. 2021-03-07T09:59:24.11 0.6 undecidable manual P 316 0.2302 50 0.34 47
IV.PETRA.HHZ. 2021-03-07T09:59:23.59 0.3 undecidable manual S 275 0.0917 137 0.06 76
IV.RESU.HHZ. 2021-03-07T09:59:23.42 0.3 positive manual P 218 0.2257 50 -0.26 71
IV.CSLB.HHZ. 2021-03-07T09:59:22.65 1.0 positive manual P 309 0.1763 50 -0.19 24
IV.PETRA.HHZ. 2021-03-07T09:59:21.47 0.1 positive manual P 275 0.0917 137 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PETRA.HHE. ML:1.4 0.0002795 0.3 AML other m 2021-03-07T09:59:23.62
IV.PETRA.HHN. ML:1.4 0.000276 0.88 AML other m 2021-03-07T09:59:24.32
IV.CSLB.HHE. ML:0.7 3.715E-5 1.24 AML other m 2021-03-07T09:59:28.64
IV.CSLB.HHN. ML:0.8 4.685E-5 0.84 AML other m 2021-03-07T09:59:28.82
IV.RESU.HHN. ML:1.4 0.000128 0.96 AML other m 2021-03-07T09:59:28.94
IV.RESU.HHE. ML:1.1 8.075E-5 1.18 AML other m 2021-03-07T09:59:29.96
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download