Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 15-07-2021 and time 01:35:29 (Italy) in region 2 km E Sortino (SR)

A magnitude ML 1.2 earthquake occured in region: 2 km E Sortino (SR), on

  • 14-07-2021 23:35:29 (UTC)
  • 15-07-2021 01:35:29 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.1660, 15.0550 at 22 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
Sortino SR 2 8690 8690
Melilli SR 7 13621 22311
Solarino SR 9 8091 30402
Ferla SR 11 2523 32925
Cassaro SR 12 821 33746
Priolo Gargallo SR 12 12091 45837
Floridia SR 13 22762 68599
Carlentini SR 13 17798 86397
Lentini SR 14 24085 110482
Canicattini Bagni SR 15 7109 117591
Augusta SR 16 36305 153896
Francofonte SR 17 12800 166696
Buscemi SR 18 1051 167747
Palazzolo Acreide SR 18 8808 176555
Buccheri SR 19 1999 178554

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km NW of Siracusa (122291 inhabitants)
38 Km S of Catania (314555 inhabitants)
39 Km NE of Ragusa (73313 inhabitants)
43 Km NE of Modica (54633 inhabitants)
51 Km S of Acireale (52622 inhabitants)
52 Km NE of Vittoria (63339 inhabitants)
72 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
Reviewed
Rev100 		ML 1.2 2021-07-14
23:35:29		 37.1663 15.0547 22 2021-07-14
23:58:58		 Sala Sismica INGV-Roma 92768441
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-14 23:35:29 ± 0.26
Latitude 37.1663 ± 0.0081
Longitude 15.0547 ± 0.0102
Depth (km) 22 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 92768441

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 943
Semi-minor axis of confidence ellipse (meter) 544
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 320
Circular confidence region, given by single value of horizontal uncertainty (meter) 940.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 86
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.01709
Epicentral distance of station farthest from the epicenter (degree) 0.29947
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:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 92768441
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-14 23:58:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HMDC.HHE. 2021-07-14T23:35:41.25 0.3 undecidable manual S 226 33.2445 116 -0.43 68
IV.HVZN.HHE. 2021-07-14T23:35:41.49 0.3 undecidable manual S 273 30.0477 119 0.58 64
IV.HLNI.HHZ. 2021-07-14T23:35:39.34 0.3 undecidable manual S 321 25.8519 123 -0.62 64
IV.HAVL.HHZ. 2021-07-14T23:35:39.11 0.6 undecidable manual S 165 23.6541 126 -0.38 47
IV.HCRL.HHZ. 2021-07-14T23:35:37.65 0.3 undecidable manual S 351 13.0758 145 0.16 74
IV.HAGA.HHZ. 2021-07-14T23:35:37.61 0.3 undecidable manual S 34 15.873 139 -0.34 71
IV.SSY.HNZ. 2021-07-14T23:35:36.33 0.3 undecidable manual S 120 1.8981 174 -0.11 77
IV.HMDC.HHE. 2021-07-14T23:35:36.70 0.1 undecidable manual P 226 33.2445 116 0.11 96
IV.HAVL.HHZ. 2021-07-14T23:35:35.50 0.3 undecidable manual P 165 23.6541 126 0.17 72
IV.HLNI.HHZ. 2021-07-14T23:35:35.67 0.6 negative manual P 321 25.8519 123 0.07 49
IV.HVZN.HHE. 2021-07-14T23:35:35.99 1.0 undecidable manual P 273 30.0477 119 -0.15 24
IV.HCRL.HHZ. 2021-07-14T23:35:34.46 0.6 undecidable manual P 351 13.0758 145 0.29 48
IV.HAGA.HHZ. 2021-07-14T23:35:34.61 0.1 undecidable manual P 34 15.873 139 0.17 98
IV.SSY.HNZ. 2021-07-14T23:35:33.74 0.1 undecidable manual P 120 1.8981 174 0.18 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HCRL.HHN. ML:1.4 0.00017545412999999999 0.1024 AML other m 2021-07-14T23:35:37.66
IV.HCRL.HHE. ML:1.3 0.00012203315 0.0384 AML other m 2021-07-14T23:35:37.75
IV.HAGA.HHE. ML:1.3 0.000127402185 0.1152 AML other m 2021-07-14T23:35:38.00
IV.HAGA.HHN. ML:1.5 0.000173244 0.0768 AML other m 2021-07-14T23:35:38.04
IV.HAVL.HHE. ML:1.0 0.00004916535 0.0896 AML other m 2021-07-14T23:35:40.38
IV.HAVL.HHN. ML:1.2 0.000071853925 0.064 AML other m 2021-07-14T23:35:40.06
IV.HLNI.HHE. ML:1.2 0.00006385190999999999 0.0896 AML other m 2021-07-14T23:35:40.35
IV.HLNI.HHN. ML:1.0 0.00004287775 0.0896 AML other m 2021-07-14T23:35:40.04
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