Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 04-05-2021 and time 08:01:42 (UTC) in region 2 km E Gangi (PA)

A magnitude ML 1.3 earthquake occured in region: 2 km E Gangi (PA), on

  • 04-05-2021 08:01:42 (UTC)
  • 04-05-2021 10:01:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8050, 14.2300 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 2 6811 6811
Geraci Siculo PA 9 1945 8756
Petralia Soprana PA 11 3360 12116
Castel di Lucio ME 12 1294 13410
Sperlinga EN 12 805 14215
Petralia Sottana PA 12 2821 17036
San Mauro Castelverde PA 13 1701 18737
Bompietro PA 13 1401 20138
Blufi PA 15 1029 21167
Alimena PA 16 2032 23199
Nicosia EN 16 13899 37098
Castellana Sicula PA 16 3411 40509
Mistretta ME 18 4791 45300
Pettineo ME 19 1350 46650
Castelbuono PA 19 8943 55593
Tusa ME 20 2925 58518

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km NE of Caltanissetta (63360 inhabitants)
70 Km E of Bagheria (55387 inhabitants)
79 Km NE of Agrigento (59770 inhabitants)
82 Km N of Gela (75827 inhabitants)
83 Km W of Catania (314555 inhabitants)
84 Km E of Palermo (674435 inhabitants)
85 Km W of Acireale (52622 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
Bulletin
Rev1000 		ML 1.3 2021-05-04
08:01:42		 37.8053 14.2297 8 2021-12-29
11:11:59		 Bollettino Sismico Italiano INGV 90044051
Reviewed
Rev100 		ML 1.3 2021-05-04
08:01:42		 37.8103 14.1927 13 2021-05-04
08:12:04		 Sala Sismica INGV-Roma 89759291
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-04 08:01:42 ± 0.17
Latitude 37.8053 ± 0.0099
Longitude 14.2297 ± 0.0182
Depth (km) 8 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90044051

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1619
Semi-minor axis of confidence ellipse (meter) 1014
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 251
Circular confidence region, given by single value of horizontal uncertainty (meter) 1620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.56028
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 90044051
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-02 09:51:36

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 89759291
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-04 08:12:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.CANO.HHZ. 2021-05-04T08:03:30.51 3.0 undecidable manual Pg 11.91 0
IV.SARZ.HHZ. 2021-05-04T08:03:28.97 3.0 positive manual Pg 6.2 0
MN.KLV.HHZ. 2021-05-04T08:03:27.08 3.0 negative manual Pg 12.79 0
IV.RNI2.HHZ. 2021-05-04T08:03:21.61 3.0 undecidable manual Sg 9.27 0
OT.OT14.EHZ. 2021-05-04T08:03:18.33 3.0 undecidable manual Sn -8.75 0
IV.NDIM.HNZ. 2021-05-04T08:03:17.77 3.0 negative manual Pn 2.32 0
IV.CAVE.HHZ. 2021-05-04T08:03:17.59 3.0 positive manual Pn 2.71 0
GU.GSCL.HHZ. 2021-05-04T08:03:13.42 3.0 undecidable manual Pg 3.97 0
IV.PE3.EHZ. 2021-05-04T08:03:09.49 3.0 positive manual Pg 13.44 0
IV.FIR.HHZ. 2021-05-04T08:03:06.37 3.0 undecidable manual Pg 6.55 0
IV.PTRP.HHZ. 2021-05-04T08:03:03.41 3.0 undecidable manual Sg 2.48 0
IV.CAPA.HHZ. 2021-05-04T08:02:59.48 3.0 undecidable manual Sn -9.99 0
IV.ARVD.HHZ. 2021-05-04T08:02:48.25 3.0 negative manual Pn -4.62 0
IV.LPEL.HHZ. 2021-05-04T08:02:31.43 3.0 undecidable manual Pn -1.88 0
IV.SPS2.HHZ. 2021-05-04T08:02:23.73 3.0 negative manual Pg 9.4 0
IV.GIUL.HHZ. 2021-05-04T08:02:18.66 3.0 positive manual Pn -7.46 0
IV.CPOZ.HHZ. 2021-05-04T08:02:16.62 3.0 positive manual Pg -0.01 0
IV.HPAC.HHZ. 2021-05-04T08:02:13.32 3.0 negative manual Pg 6.61 0
IV.MSFR.HHE. 2021-05-04T08:01:57.27 0.6 undecidable manual S 51 40.5261 50 0.59 43
IV.MUCR.HHZ. 2021-05-04T08:01:54.25 0.3 undecidable manual P 65 62.1933 50 0.12 69
IV.GIB.HHE. 2021-05-04T08:01:53.27 0.3 undecidable manual S 319 27.1506 107 0.66 64
IV.PLLN.EHZ. 2021-05-04T08:01:50.95 0.6 undecidable manual S 340 22.1556 110 0 51
IV.CSLB.HHZ. 2021-05-04T08:01:50.48 0.6 undecidable manual S 314 20.9679 111 -0.11 50
IV.MSFR.HHE. 2021-05-04T08:01:50.55 0.3 undecidable manual P 51 40.5261 50 -0.25 70
IV.GALF.HHZ. 2021-05-04T08:01:49.40 0.3 undecidable manual P 109 31.3464 105 0.15 73
IV.GIB.HHE. 2021-05-04T08:01:48.26 0.3 undecidable manual P 319 27.1506 107 -0.19 73
IV.PLLN.EHZ. 2021-05-04T08:01:47.08 0.3 undecidable manual P 340 22.1556 110 -0.41 70
IV.PETRA.HHZ. 2021-05-04T08:01:47.98 0.3 undecidable manual S 287 10.5783 128 0.58 68
IV.RESU.HHZ. 2021-05-04T08:01:47.77 0.3 undecidable manual P 221 23.2545 110 0.07 75
IV.CSLB.HHZ. 2021-05-04T08:01:46.74 0.1 undecidable manual P 314 20.9679 111 -0.54 90
IV.PETRA.HHZ. 2021-05-04T08:01:45.27 0.1 undecidable manual P 287 10.5783 128 -0.17 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PETRA.HHE. ML:1.4 0.0003605 0.26 AML other m 2021-05-04T08:01:48.35
IV.PETRA.HHN. ML:1.4 0.00038094495000000003 0.2624 AML other m 2021-05-04T08:01:48.35
IV.CSLB.HHE. ML:0.4 0.00001918673 1.8592 AML other m 2021-05-04T08:01:51.94
IV.CSLB.HHN. ML:0.6 0.000030197715 0.1792 AML other m 2021-05-04T08:01:51.86
IV.PLLN.EHN. ML:1.2 0.00011649999999999999 1.1 AML other m 2021-05-04T08:01:52.56
IV.PLLN.EHE. ML:1.2 0.0000981 1.4 AML other m 2021-05-04T08:01:53.99
IV.RESU.HHE. ML:1.1 0.0000837 0.44 AML other m 2021-05-04T08:01:55.66
IV.RESU.HHN. ML:1.3 0.0001185 0.8 AML other m 2021-05-04T08:01:55.93
IV.GALF.HHE. ML:1.5 0.000134 0.78 AML other m 2021-05-04T08:02:01.96
IV.GALF.HHN. ML:1.5 0.00014649999999999998 1.44 AML other m 2021-05-04T08:02:02.74
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