Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 20-02-2015 and time 08:32:36 (UTC) in region Canale di Sicilia meridionale (MARE)

A magnitude ML 2.3 earthquake occured in region: Canale di Sicilia meridionale (MARE), on

  • 20-02-2015 08:32:36 (UTC)
  • 20-02-2015 09:32:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 36.8030, 13.6840 at 27 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
57 Km S of Agrigento (59770 inhabitants)
58 Km SW of Gela (75827 inhabitants)
78 Km W of Vittoria (63339 inhabitants)
84 Km SW of Caltanissetta (63360 inhabitants)
94 Km W of Ragusa (73313 inhabitants)
96 Km W of Modica (54633 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 2.3 2015-02-20
08:32:36		 36.8027 13.6838 27 2015-10-19
09:27:21		 Bollettino Sismico Italiano INGV 19925341
Reviewed
Rev100 		ML 2.2 2015-02-20
08:32:37		 36.8342 13.717 12 2015-02-20
08:41:53		 Sala Sismica INGV-Roma 17135201
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2015-02-20 08:32:36 ± 0.28
Latitude 36.8027 ± 0.0216
Longitude 13.6838 ± 0.0191
Depth (km) 27 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 19925341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2160
Semi-minor axis of confidence ellipse (meter) 1449
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 347
Circular confidence region, given by single value of horizontal uncertainty (meter) 2160.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.41908
Epicentral distance of station farthest from the epicenter (degree) 1.16462
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 19925341
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-09-25 08:45:36

ML:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 17135201
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2015-02-20 08:41:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSY.HHZ. 2015-02-20T08:33:13.80 0.6 undecidable manual S 72 129.2706 54 0.69 39
IV.HLNI.HHZ. 2015-02-20T08:33:10.30 0.6 undecidable manual S 60 121.2897 54 -1.09 31
IV.MEU.SHZ. 2015-02-20T08:33:07.90 0.6 undecidable manual S 71 107.2149 100 0.12 46
IV.HMDC.HHE. 2015-02-20T08:33:05.60 0.3 undecidable manual S 80 99.0231 101 -0.05 73
IV.RAFF.HHZ. 2015-02-20T08:32:59.20 0.6 undecidable manual S 52 76.0683 104 -0.44 46
IV.HPAC.HHZ. 2015-02-20T08:32:57.12 0.3 undecidable manual P 95 120.6903 54 0.62 60
IV.HAVL.HHZ. 2015-02-20T08:32:57.88 0.1 undecidable manual P 82 128.7711 54 0.38 85
IV.SSY.HHZ. 2015-02-20T08:32:57.60 0.3 undecidable manual P 72 129.2706 54 0.03 68
IV.LINA.HHE. 2015-02-20T08:32:56.77 0.3 undecidable manual P 216 126.6732 54 -0.47 63
IV.HLNI.HHZ. 2015-02-20T08:32:56.08 0.1 undecidable manual P 60 121.2897 54 -0.5 83
IV.MEU.SHZ. 2015-02-20T08:32:54.82 0.1 undecidable manual P 71 107.2149 100 0.33 89
IV.HMDC.HHE. 2015-02-20T08:32:53.37 0.3 undecidable manual P 80 99.0231 101 0.11 71
IV.RAFF.HHZ. 2015-02-20T08:32:49.50 0.1 undecidable manual P 52 76.0683 104 -0.29 96
IV.FAVR.HHE. 2015-02-20T08:32:47.02 0.3 undecidable manual P 358 51.5151 112 0.82 62
IV.CLTA.HHZ. 2015-02-20T08:32:45.11 0.1 undecidable manual P 32 46.5201 115 -0.38 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HAVL.HHN. ML:2.4 0.0001605 1.52 AML other m 2015-02-20T08:33:16.43
IV.HAVL.HHE. ML:2.3 0.00013220000000000001 1.48 AML other m 2015-02-20T08:33:17.27
IV.HLNI.HHE. ML:2.1 0.0000779 1 AML other m 2015-02-20T08:33:12.33
IV.HLNI.HHN. ML:2.2 0.000108 0.54 AML other m 2015-02-20T08:33:13.09
IV.MEU.SHN. ML:0.0 0.00023549999999999998 0.28 AML other m 2015-02-20T08:33:08.82
IV.MEU.SHE. ML:0.0 0.0002495 0.36 AML other m 2015-02-20T08:33:10.00
IV.RAFF.HHN. ML:2.0 0.00015200000000000004 0.32 AML other m 2015-02-20T08:32:59.72
IV.RAFF.HHE. ML:2.2 0.000195 0.58 AML other m 2015-02-20T08:33:00.78
IV.SSY.HHE. ML:2.4 0.0001525 1.12 AML other m 2015-02-20T08:33:14.08
IV.SSY.HHN. ML:2.6 0.00023299999999999997 0.2 AML other m 2015-02-20T08:33:14.65
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
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