Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 01-10-2021 and time 21:52:02 (Italy) in region Costa Siciliana centro settentrionale (Palermo)

A magnitude ML 1.0 earthquake occured in region: Costa Siciliana centro settentrionale (Palermo), on

  • 01-10-2021 19:52:02 (UTC)
  • 01-10-2021 21:52:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.0870, 13.9040 at 9 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
Lascari PA 10 3588 3588
Campofelice di Roccella PA 11 7537 11125
Cefalù PA 12 14393 25518
Gratteri PA 15 963 26481
Isnello PA 18 1589 28070
Collesano PA 19 4054 32124

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Bagheria (55387 inhabitants)
47 Km E of Palermo (674435 inhabitants)
67 Km N of Caltanissetta (63360 inhabitants)
91 Km N 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
Bulletin
Rev1000 		ML 1.0 2021-10-01
19:52:02		 38.0867 13.9038 9 2022-03-30
13:04:26		 Bollettino Sismico Italiano INGV 99321481
Reviewed
Rev100 		ML 1.0 2021-10-01
19:52:02		 38.0308 13.918 16 2021-10-01
20:27:47		 Sala Sismica INGV-Roma 96111211
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-01 19:52:02 ± 0.25
Latitude 38.0867 ± 0.0252
Longitude 13.9038 ± 0.0091
Depth (km) 9 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99321481

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2735
Semi-minor axis of confidence ellipse (meter) 609
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 173
Circular confidence region, given by single value of horizontal uncertainty (meter) 2730.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 127
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.13580
Epicentral distance of station farthest from the epicenter (degree) 0.71046
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 99321481
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-04 13:53:26

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 96111211
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-01 20:27:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.IFIL.HHE. 2021-10-01T19:52:16.89 1.0 undecidable manual P 48 78.8655 50 0.8 18
IV.IACL.HHE. 2021-10-01T19:52:13.82 1.0 undecidable manual P 38 63.1923 50 0.15 22
IV.MSFR.HHZ. 2021-10-01T19:52:13.44 0.3 undecidable manual P 95 60.3951 50 0.2 67
IV.PLLN.EHZ. 2021-10-01T19:52:11.65 0.6 undecidable manual S 116 23.3544 112 0.63 43
IV.CSLB.HHZ. 2021-10-01T19:52:10.27 0.3 undecidable manual S 141 21.3675 114 -0.09 74
IV.SCIAR.HHZ. 2021-10-01T19:52:10.59 0.3 undecidable manual S 220 21.0678 114 0.3 70
IV.GIB.HHZ. 2021-10-01T19:52:08.66 0.6 undecidable manual S 135 15.0738 122 0.21 48
IV.SOLUN.HHZ. 2021-10-01T19:52:08.70 0.3 undecidable manual P 271 32.4453 50 -0.23 70
IV.PLLN.EHZ. 2021-10-01T19:52:07.03 0.1 undecidable manual P 116 23.3544 112 -0.29 94
IV.CSLB.HHZ. 2021-10-01T19:52:06.48 0.1 undecidable manual P 141 21.3675 114 -0.47 90
IV.SCIAR.HHZ. 2021-10-01T19:52:06.97 0.1 undecidable manual P 220 21.0678 114 0.06 99
IV.GIB.HHZ. 2021-10-01T19:52:05.80 0.1 negative manual P 135 15.0738 122 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SCIAR.HNE. ML:1.2 0.0001069584 0.512 AML other m 2021-10-01T19:52:09.21
IV.GIB.HHE. ML:1.0 0.000100881575 0.2688 AML other m 2021-10-01T19:52:09.68
IV.SCIAR.HHE. ML:1.1 0.00008553825 0.1408 AML other m 2021-10-01T19:52:11.19
IV.CSLB.HHE. ML:0.7 0.000033892405 0.1408 AML other m 2021-10-01T19:52:11.23
IV.CSLB.HHN. ML:0.6 0.000023382875 0.0768 AML other m 2021-10-01T19:52:11.28
IV.SCIAR.HHN. ML:1.2 0.00009857176000000001 0.2176 AML other m 2021-10-01T19:52:11.66
IV.GIB.HHN. ML:0.9 0.00007236212999999999 1.5648 AML other m 2021-10-01T19:52:11.86
IV.SOLUN.HHN. ML:0.9 0.0000357334 0.6016 AML other m 2021-10-01T19:52:12.18
IV.PLLN.EHE. ML:1.1 0.00007275 0.48 AML other m 2021-10-01T19:52:13.57
IV.SOLUN.HHE. ML:1.0 0.00004602428 1.7312 AML other m 2021-10-01T19:52:13.09
IV.SCIAR.HNN. ML:1.3 0.0001518979 1.1936 AML other m 2021-10-01T19:52:17.16
IV.PLLN.EHN. ML:1.1 0.0000818 0.34 AML other m 2021-10-01T19:52:17.29
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