Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.4 on date 25-12-2017 and time 04:25:55 (Italy) in region Costa Ragusana (Ragusa)

A magnitude ML 2.4 earthquake occured in region: Costa Ragusana (Ragusa), on

  • 25-12-2017 03:25:55 (UTC)
  • 25-12-2017 04:25:55 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 36.6120, 14.8770 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Pozzallo RG 13 19552 19552
Ispica RG 20 16061 35613

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km SE of Modica (54633 inhabitants)
37 Km SE of Ragusa (73313 inhabitants)
48 Km SE of Vittoria (63339 inhabitants)
62 Km SW of Siracusa (122291 inhabitants)
75 Km SE of Gela (75827 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 2.4 2017-12-25
03:25:55		 36.6118 14.8773 27 2018-09-04
09:10:43		 Bollettino Sismico Italiano INGV 55492151
Reviewed
Rev100 		ML 2.4 2017-12-25
03:25:56		 36.602 14.9757 28 2017-12-25
06:21:01		 Sala Sismica INGV-Roma 52792761
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-12-25 03:25:55 ± 0.41
Latitude 36.6118 ± 0.0180
Longitude 14.8773 ± 0.0639
Depth (km) 27 ± 5 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 55492151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 5299
Semi-minor axis of confidence ellipse (meter) 2233
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 96
Circular confidence region, given by single value of horizontal uncertainty (meter) 5300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 147
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) 0.57
Epicentral distance of station closest to the epicenter (degree) 0.16008
Epicentral distance of station farthest from the epicenter (degree) 1.12595
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 55492151
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-06-26 11:18:47

ML:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 52792761
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-12-25 06:21:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
MN.WDD.HHN. 2017-12-25T03:26:24.86 0.6 undecidable manual S 200 91.5417 102 1.65 26
IV.HLNI.HHZ. 2017-12-25T03:26:20.96 0.6 undecidable manual S 360 81.7515 103 0.31 47
IV.AGST.EHZ. 2017-12-25T03:26:20.87 0.6 undecidable manual S 23 77.9664 1.2 35
IV.HAGA.HHZ. 2017-12-25T03:26:20.82 0.6 undecidable manual S 18 78.6657 104 0.97 38
IV.GALF.HHZ. 2017-12-25T03:26:17.70 0.3 undecidable manual P 347 124.986 54 1.12 54
IV.SSY.HHZ. 2017-12-25T03:26:16.93 0.6 undecidable manual S 16 62.9925 1.1 36
MN.WDD.HHN. 2017-12-25T03:26:11.93 0.3 undecidable manual P 200 91.5417 102 0.27 72
IV.HAGA.HHZ. 2017-12-25T03:26:09.68 0.1 undecidable manual P 18 78.6657 104 -0.04 98
IV.HLNI.HHZ. 2017-12-25T03:26:09.52 0.3 undecidable manual P 360 81.7515 103 -0.66 62
IV.AGST.EHZ. 2017-12-25T03:26:09.34 0.1 undecidable manual P 23 77.9664 -0.28 93
IV.RAFF.HHZ. 2017-12-25T03:26:09.65 0.1 undecidable manual P 326 81.6516 103 -0.53 89
IV.SSY.HHZ. 2017-12-25T03:26:07.21 0.1 undecidable manual P 16 62.9925 -0.19 99
IV.HPAC.HHZ. 2017-12-25T03:26:05.52 0.6 undecidable manual S 53 17.7711 143 -0.08 53
IV.HPAC.HHZ. 2017-12-25T03:26:00.83 0.1 undecidable manual P 53 17.7711 143 -0.66 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSY.HHN. ML:2.7 0.0009885523 0.3392 AML other m 2017-12-25T03:26:22.29
IV.HAGA.HHE. ML:2.6 0.00051621215 0.28 AML other m 2017-12-25T03:26:22.51
IV.HLNI.HHE. ML:2.7 0.000602022 0.2592 AML other m 2017-12-25T03:26:22.84
IV.HLNI.HHN. ML:2.5 0.000431999 0.2192 AML other m 2017-12-25T03:26:22.87
IV.HAGA.HHN. ML:2.3 0.00026210860000000003 0.2992 AML other m 2017-12-25T03:26:22.00
IV.AGST.EHN. ML:2.4 0.0002965211 0.28 AML other m 2017-12-25T03:26:23.20
IV.RAFF.HHN. ML:2.1 0.0001554469 0.36 AML other m 2017-12-25T03:26:25.69
IV.AGST.EHE. ML:2.4 0.00029883935000000003 0.5408 AML other m 2017-12-25T03:26:26.34
IV.RAFF.HHE. ML:2.1 0.000163853 0.32 AML other m 2017-12-25T03:26:26.54
IV.GALF.HHE. ML:2.3 0.000129865 0.48 AML other m 2017-12-25T03:26:38.83
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
Waveforms Seismic signals in miniseed + resp format Download