Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 15-09-2023 and time 20:10:44 (Italy) in region Costa Ragusana (Ragusa)

A magnitude ML 1.3 earthquake occured in region: Costa Ragusana (Ragusa), on

  • 15-09-2023 18:10:44 (UTC)
  • 15-09-2023 20:10:44 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 36.7470, 14.6540 at 28 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
Scicli RG 7 27077 27077
Santa Croce Camerina RG 15 10823 37900
Modica RG 16 54633 92533
Pozzallo RG 17 19552 112085

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km SW of Modica (54633 inhabitants)
21 Km SW of Ragusa (73313 inhabitants)
25 Km SE of Vittoria (63339 inhabitants)
51 Km SE of Gela (75827 inhabitants)
67 Km SW of Siracusa (122291 inhabitants)
93 Km SW of Catania (314555 inhabitants)
98 Km SE 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 1.3 2023-09-15
18:10:44		 36.7468 14.654 28 2023-09-15
18:18:27		 Sala Sismica INGV-Roma 121084391
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-15 18:10:44 ± 0.21
Latitude 36.7468 ± 0.0099
Longitude 14.6540 ± 0.0090
Depth (km) 28 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121084391

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1094
Semi-minor axis of confidence ellipse (meter) 423
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 205
Circular confidence region, given by single value of horizontal uncertainty (meter) 1090.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 232
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) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.12860
Epicentral distance of station farthest from the epicenter (degree) 0.62593
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:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 121084391
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-15 18:18:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HLNI.HHZ. 2023-09-15T18:11:06.15 0.3 undecidable manual S 16 69.4749 106 -0.07 67
IV.HLNI.HHZ. 2023-09-15T18:10:56.81 0.1 undecidable manual P 16 69.4749 106 -0.27 86
IV.HVIT.HHZ. 2023-09-15T18:10:56.56 0.3 undecidable manual S 337 29.6481 128 -0.04 72
IV.RAFF.HHZ. 2023-09-15T18:10:56.00 0.1 undecidable manual P 334 58.6968 109 0.5 84
IV.HMDC.HHZ. 2023-09-15T18:10:55.96 0.3 undecidable manual S 26 26.1516 132 0.08 72
IV.ISPIC.HHE. 2023-09-15T18:10:55.27 0.3 undecidable manual S 80 22.4553 137 0.1 73
IV.CROCE.HHZ. 2023-09-15T18:10:53.85 0.1 undecidable manual S 312 14.2746 150 0 100
IV.HVZN.HHZ. 2023-09-15T18:10:53.84 0.1 undecidable manual P 6 48.1185 114 -0.15 91
IV.HVIT.HHZ. 2023-09-15T18:10:51.48 0.1 undecidable manual P 337 29.6481 128 -0.05 96
IV.HMDC.HHZ. 2023-09-15T18:10:51.08 0.1 negative manual P 26 26.1516 132 -0.03 97
IV.ISPIC.HHE. 2023-09-15T18:10:50.73 0.1 undecidable manual P 80 22.4553 137 0.03 99
IV.CROCE.HHZ. 2023-09-15T18:10:49.88 0.3 undecidable manual P 312 14.2746 150 -0.06 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CROCE.HHE. ML:1.3 0.00010159999999999999 0.32 AML other m 2023-09-15T18:10:54.04
IV.CROCE.HHN. ML:1.0 0.00005505 0.5 AML other m 2023-09-15T18:10:54.03
IV.HMDC.HHN. ML:1.6 0.0001555 1.8 AML other m 2023-09-15T18:10:55.08
IV.HVIT.HHE. ML:1.5 0.0001102 0.6 AML other m 2023-09-15T18:10:56.91
IV.HMDC.HHE. ML:1.2 0.000058649999999999996 1.18 AML other m 2023-09-15T18:10:56.15
IV.HVIT.HHN. ML:1.5 0.0001065 0.62 AML other m 2023-09-15T18:10:56.93
IV.HLNI.HHN. ML:1.3 0.000030550000000000004 0.28 AML other m 2023-09-15T18:11:06.82
IV.HLNI.HHE. ML:1.2 0.00002305 1.06 AML other m 2023-09-15T18:11:07.00
IV.CROCE.HNE. ML:1.4 0.0001231799 0.1024 AML other m 2023-09-15T18:10:54.09
IV.CROCE.HNN. ML:1.4 0.00012485399999999998 1.0752 AML other m 2023-09-15T18:10:49.59
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