Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 18-10-2015 and time 22:57:42 (Italy) in region Mar Ionio Meridionale (MARE)

A magnitude ML 2.0 earthquake occured in region: Mar Ionio Meridionale (MARE), on

  • 18-10-2015 20:57:42 (UTC)
  • 18-10-2015 22:57:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 36.5020, 15.6250 at 32 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
69 Km SE of Siracusa (122291 inhabitants)
87 Km SE of Modica (54633 inhabitants)
93 Km SE of Ragusa (73313 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 2.0 2015-10-18
20:57:42		 36.5018 15.6252 32 2016-02-19
13:22:16		 Bollettino Sismico Italiano INGV 22718331
Reviewed
Rev100 		ML 2.0 2015-10-18
20:57:42		 36.4898 15.6555 10 2015-10-18
21:02:05		 Sala Sismica INGV-Roma 21867071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2015-10-18 20:57:42 ± 0.2
Latitude 36.5018 ± 0.0090
Longitude 15.6252 ± 0.0145
Depth (km) 32 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 22718331

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1140
Semi-minor axis of confidence ellipse (meter) 978
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 78
Circular confidence region, given by single value of horizontal uncertainty (meter) 1140.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 257
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.51531
Epicentral distance of station farthest from the epicenter (degree) 1.10886
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:2.0

Field Value
Value 2.0
Uncertainty 0.1
Num. used stations 5
Type of magnitude ML
Reference to an origin 22718331
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-12-16 10:32:16

ML:2.0

Field Value
Value 2.0
Uncertainty 0.1
Num. used stations 5
Type of magnitude ML
Reference to an origin 21867071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2015-10-18 21:02:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
MN.WDD.HHE. 2015-10-18T20:58:18.08 0.1 undecidable manual S 234 123.0879 54 0.37 87
IV.HLNI.HHZ. 2015-10-18T20:58:15.94 0.3 undecidable manual S 325 115.1958 54 -0.08 69
IV.HAGA.HHZ. 2015-10-18T20:58:11.99 0.6 undecidable manual S 334 96.3258 104 0.19 48
IV.SSY.HHZ. 2015-10-18T20:58:10.20 0.3 undecidable manual S 326 87.6456 105 0.64 66
IV.AGST.EHZ. 2015-10-18T20:58:10.34 0.3 undecidable manual S 337 90.8424 105 -0.03 73
IV.HMDC.HHZ. 2015-10-18T20:58:09.63 0.1 undecidable manual S 304 90.4428 105 -0.63 83
IV.HAVL.HHZ. 2015-10-18T20:58:04.44 0.3 undecidable manual S 319 67.6767 110 -0.03 76
MN.WDD.HHE. 2015-10-18T20:58:02.66 0.1 undecidable manual P 234 123.0879 54 -0.36 85
IV.HPAC.HHZ. 2015-10-18T20:58:01.93 0.3 undecidable manual S 294 57.1983 114 0.06 79
IV.HLNI.HHZ. 2015-10-18T20:58:01.86 0.1 undecidable manual P 325 115.1958 54 -0.18 90
IV.HAGA.HHZ. 2015-10-18T20:57:59.56 0.1 undecidable manual P 334 96.3258 104 -0.05 96
IV.SSY.HHZ. 2015-10-18T20:57:58.34 0.1 undecidable manual P 326 87.6456 105 0.03 99
IV.HMDC.HHZ. 2015-10-18T20:57:58.62 0.1 negative manual P 304 90.4428 105 -0.1 96
IV.AGST.EHZ. 2015-10-18T20:57:58.82 0.1 undecidable manual P 337 90.8424 105 0.03 98
IV.HAVL.HHZ. 2015-10-18T20:57:55.63 0.1 negative manual P 319 67.6767 110 0.26 100
IV.HPAC.HHZ. 2015-10-18T20:57:53.99 0.3 undecidable manual P 294 57.1983 114 0.12 79
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.AGST.EHE. ML:2.2 0.0001485 0.12 AML other m 2015-10-18T20:58:11.20
IV.AGST.EHN. ML:2.1 0.00014700000000000002 1.46 AML other m 2015-10-18T20:58:10.97
IV.HAGA.HHE. ML:1.9 0.0000784 0.84 AML other m 2015-10-18T20:58:14.53
IV.HAGA.HHN. ML:1.9 0.00007695 1.26 AML other m 2015-10-18T20:58:14.56
IV.HAVL.HHE. ML:2.0 0.00013900000000000002 1.14 AML other m 2015-10-18T20:58:05.00
IV.HAVL.HHN. ML:2.1 0.00020850000000000003 0.66 AML other m 2015-10-18T20:58:05.48
IV.HPAC.HHE. ML:2.0 0.0001905 1.48 AML other m 2015-10-18T20:58:04.78
IV.HPAC.HHN. ML:2.1 0.0002445 0.28 AML other m 2015-10-18T20:58:06.70
IV.SSY.HHE. ML:1.8 0.00007405000000000001 1.22 AML other m 2015-10-18T20:58:16.04
IV.SSY.HHN. ML:2.2 0.000187 1.46 AML other m 2015-10-18T20:58:15.87
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