Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 22-09-2020 and time 13:47:55 (Italy) in region 4 km W Pollina (PA)

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

  • 22-09-2020 11:47:55 (UTC)
  • 22-09-2020 13:47:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.9850, 14.1070 at 4 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
Pollina PA 4 2974 2974
Castelbuono PA 6 8943 11917
Cefalù PA 10 14393 26310
Isnello PA 10 1589 27899
San Mauro Castelverde PA 11 1701 29600
Tusa ME 12 2925 32525
Gratteri PA 12 963 33488
Geraci Siculo PA 15 1945 35433
Lascari PA 15 3588 39021
Pettineo ME 16 1350 40371
Collesano PA 16 4054 44425
Motta d'Affermo ME 17 739 45164
Campofelice di Roccella PA 19 7537 52701
Petralia Sottana PA 20 2821 55522

Municipalities with at least 50000 inhabitants

An earthquake occurred to
53 Km E of Bagheria (55387 inhabitants)
55 Km N of Caltanissetta (63360 inhabitants)
67 Km E of Palermo (674435 inhabitants)
88 Km NE of Agrigento (59770 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 1.2 2020-09-22
11:47:55		 37.9847 14.1072 4 2020-09-22
12:01:45		 Sala Sismica INGV-Roma 83129951
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-22 11:47:55 ± 0.16
Latitude 37.9847 ± 0.0054
Longitude 14.1072 ± 0.0046
Depth (km) 4 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83129951

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 583
Semi-minor axis of confidence ellipse (meter) 287
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 162
Circular confidence region, given by single value of horizontal uncertainty (meter) 580.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 159
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.28509
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 83129951
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-22 12:01:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VIVA.HHZ. 2020-09-22T11:49:47.23 3.0 undecidable manual Sg 4.91 0
IV.VVLD.HHZ. 2020-09-22T11:49:40.24 3.0 undecidable manual Sg -0.46 0
IV.FDMO.HHZ. 2020-09-22T11:49:21.22 3.0 positive manual Pg 13.19 0
TV.SF01.EHZ. 2020-09-22T11:49:18.43 3.0 undecidable manual Pg 7.99 0
IV.CAFE.HHZ. 2020-09-22T11:49:12.47 3.0 undecidable manual Sn -6.56 0
IV.SPS2.HHZ. 2020-09-22T11:48:49.61 3.0 undecidable manual Sg 1.03 0
IV.PZUN.HHZ. 2020-09-22T11:48:41.20 3.0 negative manual Pg 5.9 0
IV.IFOR.HHZ. 2020-09-22T11:48:36.60 3.0 undecidable manual Pg 1.41 0
IV.MTGR.HHZ. 2020-09-22T11:48:17.41 3.0 undecidable manual P 1.41 0
IV.IST3.HHZ. 2020-09-22T11:48:06.96 3.0 negative manual P -2.06 0
IV.SCIAR.HHZ. 2020-09-22T11:48:02.10 0.1 undecidable manual P 261 31.6461 97 -0.08 94
IV.PETRA.HHZ. 2020-09-22T11:47:59.41 0.1 undecidable manual P 178 16.7721 103 0.17 95
IV.GIB.HHZ. 2020-09-22T11:47:58.82 0.3 undecidable manual S 275 7.0929 118 0.23 71
IV.CSLB.HHZ. 2020-09-22T11:47:58.38 0.1 undecidable manual S 220 6.7932 119 -0.1 98
IV.CSLB.HHZ. 2020-09-22T11:47:57.22 1.0 undecidable manual P 220 6.7932 119 -0.13 24
IV.GIB.HHZ. 2020-09-22T11:47:57.32 0.1 undecidable manual P 275 7.0929 118 -0.09 98
IV.PLLN.EHZ. 2020-09-22T11:47:57.53 0.1 undecidable manual S 74 3.2967 139 0.01 100
IV.PLLN.EHZ. 2020-09-22T11:47:56.69 0.6 undecidable manual P 74 3.2967 139 -0.1 49
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PLLN.EHN. ML:2.0 0.0015899999999999998 0.6 AML other m 2020-09-22T11:47:57.93
IV.PLLN.EHE. ML:1.8 0.0010149999999999998 0.24 AML other m 2020-09-22T11:47:58.38
IV.CSLB.HHE. ML:1.6 0.0003075 0.24 AML other m 2020-09-22T11:47:58.55
IV.CSLB.HHN. ML:1.4 0.000201 0.4 AML other m 2020-09-22T11:47:58.60
IV.GIB.HHN. ML:1.8 0.0005885 1.68 AML other m 2020-09-22T11:47:59.86
IV.GIB.HHE. ML:1.8 0.0005265 1.1 AML other m 2020-09-22T11:48:00.13
IV.PETRA.HHN. ML:1.2 0.000177 1.52 AML other m 2020-09-22T11:48:03.89
IV.PETRA.HHE. ML:1.1 0.00011449999999999999 0.86 AML other m 2020-09-22T11:48:04.49
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