Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 21-09-2022 and time 20:24:02 (UTC) in region 6 km E Cassaro (SR)

A magnitude ML 1.4 earthquake occured in region: 6 km E Cassaro (SR), on

  • 21-09-2022 20:24:02 (UTC)
  • 21-09-2022 22:24:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.1010, 15.0200 at 26 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
Cassaro SR 6 821 821
Sortino SR 7 8690 9511
Ferla SR 7 2523 12034
Canicattini Bagni SR 8 7109 19143
Solarino SR 9 8091 27234
Palazzolo Acreide SR 11 8808 36042
Floridia SR 12 22762 58804
Buscemi SR 12 1051 59855
Melilli SR 13 13621 73476
Buccheri SR 15 1999 75475
Priolo Gargallo SR 16 12091 87566
Francofonte SR 19 12800 100366
Carlentini SR 20 17798 118164

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km W of Siracusa (122291 inhabitants)
32 Km NE of Ragusa (73313 inhabitants)
35 Km NE of Modica (54633 inhabitants)
45 Km S of Catania (314555 inhabitants)
46 Km E of Vittoria (63339 inhabitants)
58 Km S of Acireale (52622 inhabitants)
68 Km E of Gela (75827 inhabitants)
95 Km E of Caltanissetta (63360 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 1.4 2022-09-21
20:24:02		 37.1013 15.0205 26 2024-03-01
15:27:56		 Bollettino Sismico Italiano INGV 110931381
Reviewed
Rev100 		ML 1.7 2022-09-21
20:24:01		 36.9592 15.212 10 2022-09-21
20:28:59		 Sala Sismica INGV-Roma 109972881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-09-21 20:24:02 ± 0.09
Latitude 37.1013 ± 0.0036
Longitude 15.0205 ± 0.0045
Depth (km) 26 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 110931381

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 428
Semi-minor axis of confidence ellipse (meter) 222
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 126
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
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 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.07015
Epicentral distance of station farthest from the epicenter (degree) 0.41279
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:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 110931381
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-04-11 17:03:18

ML:1.7

Field Value
Value 1.7
Uncertainty 0.0
Num. used stations 2
Type of magnitude ML
Reference to an origin 109972881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-09-21 20:28:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HVIT.HHZ. 2022-09-21T20:24:18.40 0.6 undecidable manual S 255 45.8208 113 0.08 49
IV.ISPIC.EHZ. 2022-09-21T20:24:16.17 0.6 undecidable manual S 196 37.1295 119 -0.06 49
IV.HMDC.HHZ. 2022-09-21T20:24:13.79 0.3 undecidable manual S 233 26.2515 130 -0.05 76
IV.HAGA.HHZ. 2022-09-21T20:24:13.06 0.6 undecidable manual S 30 23.5542 133 -0.23 49
IV.HCRL.HHZ. 2022-09-21T20:24:12.71 0.6 undecidable manual S 3 20.1687 138 0.05 51
IV.HAVL.HHZ. 2022-09-21T20:24:12.31 0.6 undecidable manual S 150 18.1707 141 0.01 52
IV.SSY.HHZ. 2022-09-21T20:24:11.16 0.6 undecidable manual S 37 7.7811 161 0.18 51
IV.HVIT.HHZ. 2022-09-21T20:24:11.66 0.3 undecidable manual P 255 45.8208 113 -0.1 72
1J.FX02.HHZ. 2022-09-21T20:24:11.34 0.6 undecidable manual S 50 13.2756 150 -0.22 50
IV.ISPIC.EHZ. 2022-09-21T20:24:10.56 0.1 undecidable manual P 196 37.1295 119 0.01 100
IV.HMDC.HHZ. 2022-09-21T20:24:09.15 0.3 undecidable manual P 233 26.2515 130 -0.02 76
IV.HAVL.HHZ. 2022-09-21T20:24:08.44 0.3 undecidable manual P 150 18.1707 141 0.15 75
IV.HCRL.HHZ. 2022-09-21T20:24:08.59 0.3 undecidable manual P 3 20.1687 138 0.1 76
IV.HAGA.HHZ. 2022-09-21T20:24:08.75 0.3 undecidable manual P 30 23.5542 133 -0.11 75
1J.FX02.HHZ. 2022-09-21T20:24:07.82 0.3 undecidable manual P 50 13.2756 150 -0.04 78
IV.SSY.HHZ. 2022-09-21T20:24:07.65 0.3 undecidable manual P 37 7.7811 161 0.14 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSY.HNN. ML:1.2 0.00009312629 0.1536 AML other m 2022-09-21T20:24:11.46
IV.HCRL.HHN. ML:1.6 0.00019546095000000003 0.1024 AML other m 2022-09-21T20:24:12.79
IV.HCRL.HHE. ML:1.4 0.00012628196 0.1664 AML other m 2022-09-21T20:24:12.84
IV.HMDC.HHN. ML:1.3 0.000081711991 0.32 AML other m 2022-09-21T20:24:13.87
IV.HMDC.HNE. ML:1.5 0.00013621384 0.4864 AML other m 2022-09-21T20:24:14.61
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