Earthquake with magnitude of ML 1.4 on date 23-10-2020 and time 08:41:11 (Italy) in region 2 km S Isnello (PA)

A magnitude ML 1.4 earthquake occured in region: 2 km S Isnello (PA), on

  • 23-10-2020 06:41:11 (UTC)
  • 23-10-2020 08:41:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.93, 14 at 25 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Isnello PA 2 1589 1589
Gratteri PA 5 963 2552
Collesano PA 6 4054 6606
Castelbuono PA 8 8943 15549
Lascari PA 10 3588 19137
Scillato PA 11 613 19750
Campofelice di Roccella PA 12 7537 27287
Polizzi Generosa PA 13 3407 30694
Cefal├╣ PA 13 14393 45087
Pollina PA 15 2974 48061
Caltavuturo PA 15 4017 52078
Geraci Siculo PA 16 1945 54023
Petralia Sottana PA 16 2821 56844
Cerda PA 16 5330 62174
Castellana Sicula PA 17 3411 65585
San Mauro Castelverde PA 17 1701 67286
Sclafani Bagni PA 17 426 67712
Petralia Soprana PA 17 3360 71072

Municipalities with at least 50000 inhabitants

An earthquake occurred to
46 Km E of Bagheria (55387 inhabitants)
49 Km N of Caltanissetta (63360 inhabitants)
60 Km E of Palermo (674435 inhabitants)
78 Km NE of Agrigento (59770 inhabitants)
98 Km N of Gela (75827 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 1.4 2020-10-23
06:41:11
37.93 14 25 2020-10-23
06:48:29
Sala Sismica INGV-Roma 84049911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-23 06:41:11 ± 0.42
Latitude 37.93 ± 0.02
Longitude 14.00 ± 0.02
Depth (km) 25 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84049911

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1858
Semi-minor axis of confidence ellipse (meter) 1366
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 203
Circular confidence region, given by single value of horizontal uncertainty (meter) 1860
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 104
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.45
Epicentral distance of station closest to the epicenter (degree) 0.04676
Epicentral distance of station farthest from the epicenter (degree) 0.47754
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.1
Num. used stations 12
Type of magnitude ML
Reference to an origin 84049911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-23 06:48:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RESU.HHZ. 2020-10-23T06:41:24.12 0.3 undecidable manual S 171 0.2833 122 0.83 59
IV.MSFR.HHE. 2020-10-23T06:41:21.38 0.1 undecidable manual P 77 0.4775 109 0.14 100
IV.SCIAR.HHZ. 2020-10-23T06:41:21.36 0.3 undecidable manual S 274 0.1988 134 0.06 80
IV.PLLN.EHZ. 2020-10-23T06:41:20.63 0.6 undecidable manual S 60 0.1304 146 0.63 48
IV.GIB.HHZ. 2020-10-23T06:41:19.91 0.3 undecidable manual S 18 0.0665 162 0.74 70
IV.CSLB.HHZ. 2020-10-23T06:41:18.64 0.6 undecidable manual S 77 0.0468 167 -0.37 52
IV.PETRA.HHZ. 2020-10-23T06:41:18.97 0.6 undecidable manual S 136 0.1295 147 -1.02 41
IV.RESU.HHZ. 2020-10-23T06:41:17.48 1.0 undecidable manual P 171 0.2833 122 -0.74 23
IV.PLLN.EHZ. 2020-10-23T06:41:16.25 0.3 positive manual P 60 0.1304 146 -0.07 81
IV.SCIAR.HHZ. 2020-10-23T06:41:16.95 0.3 negative manual P 274 0.1988 134 -0.12 80
IV.GIB.HHZ. 2020-10-23T06:41:15.87 0.6 positive manual P 18 0.0665 162 0.03 55
IV.CSLB.HHZ. 2020-10-23T06:41:15.25 0.3 positive manual P 77 0.0468 167 -0.5 76
IV.PETRA.HHZ. 2020-10-23T06:41:15.33 1.0 negative manual P 136 0.1295 147 -0.98 21
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSLB.HHN. ML:1.5 0.0001995 0.38 AML other m 2020-10-23T06:41:18.75
IV.CSLB.HHE. ML:1.2 0.000106 0.46 AML other m 2020-10-23T06:41:18.73
IV.PETRA.HHN. ML:1.4 0.0001315 0.46 AML other m 2020-10-23T06:41:20.19
IV.GIB.HHE. ML:1.5 0.0001925 0.28 AML other m 2020-10-23T06:41:20.34
IV.PETRA.HHE. ML:1.4 0.0001385 1.32 AML other m 2020-10-23T06:41:20.97
IV.GIB.HHN. ML:1.9 0.000439 0.34 AML other m 2020-10-23T06:41:20.39
IV.PLLN.EHE. ML:1.5 0.000159 0.56 AML other m 2020-10-23T06:41:21.31
IV.SCIAR.HHE. ML:1.5 0.0001375 0.3 AML other m 2020-10-23T06:41:22.22
IV.SCIAR.HHN. ML:1.3 9.64E-5 1.64 AML other m 2020-10-23T06:41:23.88
IV.PLLN.EHN. ML:1.4 0.000135 1.62 AML other m 2020-10-23T06:41:23.85
IV.RESU.HHE. ML:1.4 8.18E-5 0.32 AML other m 2020-10-23T06:41:25.48
IV.RESU.HHN. ML:1.5 0.00010295 0.46 AML other m 2020-10-23T06:41:25.71
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download