Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.5 on date 31-10-2010 and time 19:50:46 (Italy) in region 5 km NW Sperlinga (EN)

A magnitude ML 2.5 earthquake occured in region: 5 km NW Sperlinga (EN), on

  • 31-10-2010 18:50:46 (UTC)
  • 31-10-2010 19:50:46 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.8070, 14.3360 at 58 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
Sperlinga EN 5 805 805
Nicosia EN 9 13899 14704
Castel di Lucio ME 9 1294 15998
Gangi PA 12 6811 22809
Capizzi ME 13 3176 25985
Mistretta ME 14 4791 30776
Cerami EN 15 2006 32782
Geraci Siculo PA 17 1945 34727
San Mauro Castelverde PA 18 1701 36428
Pettineo ME 18 1350 37778
Reitano ME 19 806 38584
Leonforte EN 19 13439 52023
Nissoria EN 20 3000 55023
Motta d'Affermo ME 20 739 55762

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km NE of Caltanissetta (63360 inhabitants)
74 Km W of Catania (314555 inhabitants)
76 Km W of Acireale (52622 inhabitants)
78 Km E of Bagheria (55387 inhabitants)
83 Km N of Gela (75827 inhabitants)
86 Km NE of Agrigento (59770 inhabitants)
92 Km E of Palermo (674435 inhabitants)
97 Km N of Vittoria (63339 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 2.5 2010-10-31
18:50:46		 37.807 14.336 58 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1137909
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2010-10-31 18:50:46 ± 0.21
Latitude 37.8070 ± 0.0171
Longitude 14.3360 ± 0.0159
Depth (km) 58 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1137909

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1979
Semi-minor axis of confidence ellipse (meter) 974
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 216
Circular confidence region, given by single value of horizontal uncertainty (meter) 2360.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 178
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.89483
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 10
Magnitude information

ML:2.5

Field Value
Value 2.5
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 1137909
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 22:06:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MNS.HHZ. 2010-10-31T18:51:24.60 10.0 undecidable manual Pg 0 0 0
IV.HLNI.HHN. 2010-10-31T18:51:16.80 10.0 undecidable manual Pg 0 0 0
IV.SSY.HHE. 2010-10-31T18:51:16.29 0.3 undecidable manual Sg 138 96.9252 0.545 61
IV.AGST.EHE. 2010-10-31T18:51:16.10 0.3 undecidable manual Sg 128 99.3228 -0.129 67
IV.HCRL.HHN. 2010-10-31T18:51:13.13 0.1 undecidable manual Sg 133 84.4488 -0.092 93
IV.HVZN.HHZ. 2010-10-31T18:51:11.34 0.3 undecidable manual Sg 154 77.2671 -0.487 65
IV.RAFF.HHE. 2010-10-31T18:51:09.81 0.6 undecidable manual Sg 178 64.8906 0.332 46
IV.ALJA.HHN. 2010-10-31T18:51:07.31 0.3 undecidable manual Sg 263 51.5151 0.178 73
IV.ECNV.HHN. 2010-10-31T18:51:05.52 0.3 undecidable manual Sg 125 40.5261 0.097 76
IV.GIB.HHE. 2010-10-31T18:51:04.05 0.6 undecidable manual Sg 307 33.9438 -0.483 47
IV.RESU.HHN. 2010-10-31T18:51:04.31 0.1 undecidable manual Sg 234 30.2475 0.23 100
IV.CAGR.HHZ. 2010-10-31T18:51:03.23 0.6 undecidable manual Sg 145 25.0527 -0.283 50
IV.AGST.EHE. 2010-10-31T18:51:03.62 0.3 undecidable manual Pg 128 99.3228 -0.187 66
IV.MCEL.HHZ. 2010-10-31T18:51:03.21 10.0 undecidable manual Pg 0 0 0
IV.SSY.HHE. 2010-10-31T18:51:03.56 0.1 undecidable manual Pg 138 96.9252 0.039 92
IV.HCRL.HHN. 2010-10-31T18:51:01.85 0.1 undecidable manual Pg 133 84.4488 -0.217 91
IV.HVZN.HHZ. 2010-10-31T18:51:01.15 0.1 undecidable manual Pg 154 77.2671 -0.116 94
IV.RAFF.HHE. 2010-10-31T18:50:59.67 0.1 positive manual Pg 178 64.8906 -0.235 94
IV.ECNV.HHN. 2010-10-31T18:50:58.37 0.1 undecidable manual Pg 125 40.5261 0.801 83
IV.ALJA.HHN. 2010-10-31T18:50:58.62 0.3 undecidable manual Pg 263 51.5151 0.065 75
IV.RESU.HHN. 2010-10-31T18:50:56.17 0.3 undecidable manual Pg 234 30.2475 -0.618 68
IV.CAGR.HHZ. 2010-10-31T18:50:56.84 0.1 undecidable manual Pg 145 25.0527 0.385 98
IV.GIB.HHE. 2010-10-31T18:50:56.94 0.3 undecidable manual Pg 307 33.9438 -0.111 76
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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