Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 18-11-2018 and time 08:39:48 (Italy) in region Costa Siracusana (Siracusa)

A magnitude ML 2.1 earthquake occured in region: Costa Siracusana (Siracusa), on

  • 18-11-2018 07:39:48 (UTC)
  • 18-11-2018 08:39:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 36.6460, 15.3640 at 33 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km S of Siracusa (122291 inhabitants)
59 Km E of Modica (54633 inhabitants)
64 Km SE of Ragusa (73313 inhabitants)
81 Km E of Vittoria (63339 inhabitants)
99 Km S of Catania (314555 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 2.1 2018-11-18
07:39:48		 36.6457 15.3635 33 2019-06-04
09:16:10		 Bollettino Sismico Italiano INGV 65763851
Reviewed
Rev100 		ML 2.0 2018-11-18
07:39:47		 36.638 15.3622 34 2018-11-18
07:58:41		 Sala Sismica INGV-Roma 63174221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-11-18 07:39:48 ± 0.29
Latitude 36.6457 ± 0.0144
Longitude 15.3635 ± 0.0157
Depth (km) 33 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 65763851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1639
Semi-minor axis of confidence ellipse (meter) 1212
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 328
Circular confidence region, given by single value of horizontal uncertainty (meter) 1640.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 299
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.98566
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 65763851
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-02-21 13:21:14

ML:2.0

Field Value
Value 2.0
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 63174221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-11-18 07:58:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RAFF.HHZ. 2018-11-18T07:40:20.24 1.0 undecidable manual S 306 109.4127 54 0.54 27
IV.HLNI.HHZ. 2018-11-18T07:40:14.58 1.0 undecidable manual S 331 89.3439 106 -0.55 26
IV.MFNL.HHZ. 2018-11-18T07:40:13.20 3.0 positive manual P -0.42 0
IV.CROCE.HHZ. 2018-11-18T07:40:11.28 0.6 undecidable manual S 286 76.5678 108 -0.6 56
IV.HAGA.HHZ. 2018-11-18T07:40:10.90 1.0 undecidable manual S 345 73.2711 109 -0.15 30
IV.HMDC.HHZ. 2018-11-18T07:40:08.51 0.6 undecidable manual S 304 62.1933 113 0.23 61
IV.SSY.HHZ. 2018-11-18T07:40:08.72 0.6 undecidable manual S 336 62.3931 113 0.39 60
IV.RAFF.HHZ. 2018-11-18T07:40:06.66 0.6 undecidable manual P 306 109.4127 54 0.34 56
IV.HLNI.HHZ. 2018-11-18T07:40:03.35 1.0 undecidable manual P 331 89.3439 106 -0.33 28
IV.HPAC.HHE. 2018-11-18T07:40:01.35 0.6 undecidable manual S 284 29.8479 134 0.37 62
IV.HAGA.HHZ. 2018-11-18T07:40:01.22 0.6 undecidable manual P 345 73.2711 109 -0.11 61
IV.CROCE.HHZ. 2018-11-18T07:40:01.51 0.6 undecidable manual P 286 76.5678 108 -0.29 60
IV.HMDC.HHZ. 2018-11-18T07:39:59.50 0.6 undecidable manual P 304 62.1933 113 -0.23 62
IV.SSY.HHZ. 2018-11-18T07:39:59.85 0.3 undecidable manual P 336 62.3931 113 0.1 96
IV.HPAC.HHE. 2018-11-18T07:39:55.58 0.3 undecidable manual P 284 29.8479 134 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSY.HHE. ML:2.3 0.00033253140000000003 1.5232 AML other m 2018-11-18T07:40:09.19
IV.SSY.HHN. ML:2.7 0.0008732777499999999 0.4384 AML other m 2018-11-18T07:40:09.28
IV.HMDC.HHN. ML:2.0 0.00015388065000000002 0.2432 AML other m 2018-11-18T07:40:09.61
IV.HMDC.HHE. ML:2.0 0.000152210185 0.16 AML other m 2018-11-18T07:40:10.70
IV.HAGA.HHE. ML:2.1 0.00016136719999999998 0.1024 AML other m 2018-11-18T07:40:11.72
IV.HAGA.HHN. ML:2.0 0.00012360187 0.0832 AML other m 2018-11-18T07:40:12.90
IV.HLNI.HHN. ML:2.1 0.00012780859 0.1984 AML other m 2018-11-18T07:40:15.15
IV.HLNI.HHE. ML:2.0 0.00010693823 0.16 AML other m 2018-11-18T07:40:15.49
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
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