Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 02-12-2019 and time 11:26:20 (UTC) in region 4 km SE Petralia Soprana (PA)

A magnitude ML 1.7 earthquake occured in region: 4 km SE Petralia Soprana (PA), on

  • 02-12-2019 11:26:20 (UTC)
  • 02-12-2019 12:26:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7750, 14.1450 at 22 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
Petralia Soprana PA 4 3360 3360
Bompietro PA 5 1401 4761
Petralia Sottana PA 6 2821 7582
Gangi PA 6 6811 14393
Blufi PA 6 1029 15422
Castellana Sicula PA 9 3411 18833
Geraci Siculo PA 10 1945 20778
Alimena PA 10 2032 22810
Polizzi Generosa PA 13 3407 26217
Resuttano CL 14 2038 28255
San Mauro Castelverde PA 16 1701 29956
Sperlinga EN 18 805 30761
Castelbuono PA 19 8943 39704
Castel di Lucio ME 19 1294 40998

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km N of Caltanissetta (63360 inhabitants)
65 Km SE of Bagheria (55387 inhabitants)
71 Km NE of Agrigento (59770 inhabitants)
78 Km SE of Palermo (674435 inhabitants)
79 Km N of Gela (75827 inhabitants)
88 Km W of Catania (314555 inhabitants)
92 Km W of Acireale (52622 inhabitants)
98 Km NW 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
Bulletin
Rev1000 		ML 1.7 2019-12-02
11:26:20		 37.775 14.1448 22 2020-02-28
16:42:14		 Bollettino Sismico Italiano INGV 74737321
Reviewed
Rev100 		ML 1.8 2019-12-02
11:26:20		 37.7602 14.1552 21 2019-12-02
11:35:35		 Sala Sismica INGV-Roma 74246751
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-02 11:26:20 ± 0.43
Latitude 37.7750 ± 0.0198
Longitude 14.1448 ± 0.0296
Depth (km) 22 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 74737321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2110
Semi-minor axis of confidence ellipse (meter) 1756
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 297
Circular confidence region, given by single value of horizontal uncertainty (meter) 2110.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.43
Epicentral distance of station closest to the epicenter (degree) 0.06295
Epicentral distance of station farthest from the epicenter (degree) 0.43707
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 74737321
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-12-17 14:09:04

ML:1.8

Field Value
Value 1.8
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 74246751
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-02 11:35:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSLB.HHZ. 2019-12-02T11:26:30.07 0.6 undecidable manual S 337 19.5693 133 0.89 41
IV.PLLN.EHZ. 2019-12-02T11:26:30.29 0.6 undecidable manual S 360 24.1536 126 0.16 52
IV.MSFR.HHZ. 2019-12-02T11:26:29.04 0.3 undecidable manual P 54 48.5181 107 -0.29 73
IV.RESU.HHZ. 2019-12-02T11:26:28.93 0.6 undecidable manual S 209 16.1727 139 0.38 50
IV.GALF.HHE. 2019-12-02T11:26:28.48 0.3 undecidable manual P 101 37.629 113 0.73 65
IV.ALJA.HHE. 2019-12-02T11:26:27.73 0.3 undecidable manual P 265 34.4433 115 0.44 73
IV.PETRA.HHZ. 2019-12-02T11:26:27.09 0.6 undecidable manual S 338 6.993 160 -0.2 53
IV.CSLB.HHZ. 2019-12-02T11:26:25.17 0.3 undecidable manual P 337 19.5693 133 -0.21 78
IV.PLLN.EHZ. 2019-12-02T11:26:25.87 0.3 undecidable manual P 360 24.1536 126 -0.05 80
IV.RESU.HHZ. 2019-12-02T11:26:24.46 0.3 undecidable manual P 209 16.1727 139 -0.55 71
IV.PETRA.HHZ. 2019-12-02T11:26:23.81 0.1 positive manual P 338 6.993 160 -0.48 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PETRA.HHN. ML:1.9 0.0005478800500000001 0.4224 AML other m 2019-12-02T11:26:27.88
IV.PETRA.HHE. ML:1.8 0.00039284375 0.5824 AML other m 2019-12-02T11:26:27.57
IV.RESU.HHN. ML:1.9 0.0004283715 0.736 AML other m 2019-12-02T11:26:29.49
IV.RESU.HHE. ML:1.7 0.0002822724 0.4224 AML other m 2019-12-02T11:26:29.51
IV.PLLN.EHE. ML:1.4 0.00010833495 0.4224 AML other m 2019-12-02T11:26:35.85
IV.PLLN.EHN. ML:1.7 0.000209091 0.7424 AML other m 2019-12-02T11:26:31.60
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