Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 04-07-2009 and time 03:24:36 (Italy) in region Costa Siracusana (Siracusa)

A magnitude ML 2.0 earthquake occured in region: Costa Siracusana (Siracusa), on

  • 04-07-2009 01:24:36 (UTC)
  • 04-07-2009 03:24:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 36.8980, 15.3160 at 28 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
Avola SR 16 31708 31708
Siracusa SR 18 122291 153999

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km S of Siracusa (122291 inhabitants)
50 Km E of Modica (54633 inhabitants)
52 Km E of Ragusa (73313 inhabitants)
69 Km E of Vittoria (63339 inhabitants)
70 Km S of Catania (314555 inhabitants)
81 Km S of Acireale (52622 inhabitants)
96 Km E 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 		Md 1.8
ML 2.0 		2009-07-04
01:24:36		 36.898 15.316 28 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 915479
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-07-04 01:24:36 ± 0.35
Latitude 36.8980 ± 0.0099
Longitude 15.3160 ± 0.0146
Depth (km) 28 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 915479

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1094
Semi-minor axis of confidence ellipse (meter) 877
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 353
Circular confidence region, given by single value of horizontal uncertainty (meter) 1702.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 289
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.55488
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 915479
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 17:25:42

Md:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 915479
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 17:25:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASSB.HHN. 2009-07-04T01:25:02.04 10.0 undecidable manual Pg 0 0 0
MN.AQU.HHZ. 2009-07-04T01:25:00.36 10.0 undecidable manual Sg 0 0 0
IV.HVZN.HHN. 2009-07-04T01:24:56.76 0.1 undecidable manual Sg 300 61.5939 0.51 84
IV.HMDC.HHZ. 2009-07-04T01:24:52.43 0.1 undecidable manual Sg 278 47.7189 -0.379 87
IV.FIAM.HHE. 2009-07-04T01:24:51.54 10.0 undecidable manual Pg 0 0 0
IV.AGST.EHZ. 2009-07-04T01:24:50.83 0.1 undecidable manual Sg 349 40.5261 -0.248 93
MN.AQU.HHZ. 2009-07-04T01:24:50.47 10.0 undecidable manual Pg 0 0 0
IV.TERO.HHN. 2009-07-04T01:24:50.34 10.0 undecidable manual Pg 0 0 0
IV.SSY.HHZ. 2009-07-04T01:24:49.88 0.1 undecidable manual Sg 323 35.9418 -0.142 95
IV.NRCA.SHZ. 2009-07-04T01:24:48.90 10.0 undecidable manual Sg 0 0 0
IV.HVZN.HHN. 2009-07-04T01:24:47.92 0.1 undecidable manual Pg 300 61.5939 -0.026 92
IV.HAVL.HHZ. 2009-07-04T01:24:46.63 0.1 undecidable manual Sg 292 18.5703 0.062 100
IV.T0104.EHE. 2009-07-04T01:24:46.00 10.0 undecidable manual Pg 0 0 0
IV.HMDC.HHZ. 2009-07-04T01:24:45.91 0.1 undecidable manual Pg 278 47.7189 -0.05 94
IV.SSY.HHZ. 2009-07-04T01:24:44.42 0.1 negative manual Pg 323 35.9418 0.069 96
IV.AGST.EHZ. 2009-07-04T01:24:44.96 0.1 undecidable manual Pg 349 40.5261 -0.001 96
IV.NRCA.SHZ. 2009-07-04T01:24:44.24 10.0 undecidable manual Pg 0 0 0
IV.HAVL.HHZ. 2009-07-04T01:24:42.58 0.1 negative manual Pg 292 18.5703 0.224 96
IV.LNSS.HHE. 2009-07-04T01:24:40.27 10.0 undecidable manual Pg 0 0 0
IV.SAN2.EHZ. 2009-07-04T01:24:36.95 10.0 undecidable manual Pg 0 0 0
IV.MEU.SHZ. 2009-07-04T01:24:33.24 10.0 undecidable manual Sg 0 0 0
IV.MEU.SHZ. 2009-07-04T01:24:26.43 10.0 negative manual Pg 0 0 0
IV.FNVD.HHN. 2009-07-04T01:24:25.72 10.0 undecidable manual Pg 0 0 0
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