Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 09-07-2021 and time 22:28:16 (Italy) in region 6 km W Lentini (SR)

A magnitude ML 1.3 earthquake occured in region: 6 km W Lentini (SR), on

  • 09-07-2021 20:28:16 (UTC)
  • 09-07-2021 22:28:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.2900, 14.9350 at 10 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
Lentini SR 6 24085 24085
Carlentini SR 7 17798 41883
Scordia CT 8 17095 58978
Francofonte SR 8 12800 71778
Militello in Val di Catania CT 13 7443 79221
Sortino SR 17 8690 87911
Palagonia CT 17 16608 104519
Ferla SR 19 2523 107042
Buccheri SR 20 1999 109041

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SW of Catania (314555 inhabitants)
41 Km NW of Siracusa (122291 inhabitants)
41 Km SW of Acireale (52622 inhabitants)
44 Km NE of Ragusa (73313 inhabitants)
50 Km N of Modica (54633 inhabitants)
52 Km NE of Vittoria (63339 inhabitants)
66 Km E of Gela (75827 inhabitants)
80 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 1.3 2021-07-09
20:28:16		 37.29 14.9348 10 2021-12-29
11:12:12		 Bollettino Sismico Italiano INGV 92979211
Reviewed
Rev100 		ML 1.3 2021-07-09
20:28:16		 37.2902 14.9297 10 2021-07-09
20:34:04		 Sala Sismica INGV-Roma 92522251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-09 20:28:16 ± 0.07
Latitude 37.2900 ± 0.0036
Longitude 14.9348 ± 0.0023
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 92979211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 404
Semi-minor axis of confidence ellipse (meter) 167
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 8
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 132
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) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.05396
Epicentral distance of station farthest from the epicenter (degree) 0.36243
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 92979211
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-01 18:44:55

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 92522251
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-09 20:34:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHE. 2021-07-09T20:28:30.15 0.6 undecidable manual S 156 40.2264 50 0.23 46
IV.HVZN.HHZ. 2021-07-09T20:28:25.24 0.6 undecidable manual S 237 22.9548 113 0.13 48
IV.HAVL.HHE. 2021-07-09T20:28:24.17 0.3 undecidable manual P 156 40.2264 50 -0.05 71
IV.HAGA.HHZ. 2021-07-09T20:28:23.87 0.6 undecidable manual S 92 19.4694 117 -0.12 49
IV.SSY.HHZ. 2021-07-09T20:28:23.89 0.6 undecidable manual S 140 19.1697 117 0 50
IV.HCRL.HHZ. 2021-07-09T20:28:21.14 0.6 undecidable manual S 95 8.6802 139 0.17 49
IV.HVZN.HHZ. 2021-07-09T20:28:21.29 0.1 undecidable manual P 237 22.9548 113 -0.16 96
IV.HAGA.HHZ. 2021-07-09T20:28:20.68 0.1 undecidable manual P 92 19.4694 117 -0.12 97
IV.HLNI.HHZ. 2021-07-09T20:28:20.90 0.6 undecidable manual S 320 8.4804 139 -0.05 50
IV.SSY.HHZ. 2021-07-09T20:28:20.64 0.1 undecidable manual P 140 19.1697 117 -0.1 98
IT.LNT.HGZ. 2021-07-09T20:28:20.40 0.6 undecidable manual S 92 5.994 149 -0.01 51
IV.HCRL.HHZ. 2021-07-09T20:28:19.18 0.1 positive manual P 95 8.6802 139 0.12 99
IV.HLNI.HHZ. 2021-07-09T20:28:19.12 0.1 negative manual P 320 8.4804 139 0.08 100
IT.LNT.HGZ. 2021-07-09T20:28:18.82 0.3 undecidable manual P 92 5.994 149 0.09 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HLNI.HHE. ML:1.1 0.00017099999999999998 0.98 AML other m 2021-07-09T20:28:21.72
IV.HCRL.HHN. ML:1.5 0.00044899999999999996 0.16 AML other m 2021-07-09T20:28:21.27
IV.HCRL.HHE. ML:1.2 0.00021150000000000002 0.4 AML other m 2021-07-09T20:28:21.49
IV.HLNI.HHN. ML:1.1 0.000185 0.78 AML other m 2021-07-09T20:28:21.59
IV.HVZN.HNE. ML:1.2 0.00011599999999999999 0.92 AML other m 2021-07-09T20:28:31.18
IV.HVZN.HNN. ML:1.5 0.00021585 1.58 AML other m 2021-07-09T20:28:33.10
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