Earthquake with magnitude of Md 2.9 on date 18-08-2004 and time 04:13:33 (Italy) in region Mar Ionio Meridionale (MARE)

A magnitude Md 2.9 earthquake occured in region: Mar Ionio Meridionale (MARE), on

  • 18-08-2004 02:13:33 (UTC)
  • 18-08-2004 04:13:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 36.52, 15.64 at 10 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.

Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
68 Km SE of Siracusa (122291 inhabitants)
87 Km E 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
Md 2.9
ML-VAX 2.7
2004-08-18
02:13:33
36.52 15.64 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 503249
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2004-08-18 02:13:33 ± 0.553
Latitude 36.52 ± 0.03
Longitude 15.64 ± 0.05
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 503249

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 5289.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 219
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) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00688
Epicentral distance of station farthest from the epicenter (degree) 0.02145
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

Md:2.9

Field Value
Value 2.9
Uncertainty
Num. used stations 6
Type of magnitude Md
Reference to an origin 503249
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 01:01:24

ML:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 503249
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.GRI.Z. 2004-08-18T02:14:13.70 10.0 undecidable manual PN 14 0.0215 0.54 1
--.WDD.E. 2004-08-18T02:14:10.60 10.0 undecidable manual SN 234 0.01 -0.06 0.7
--.PLLN.Z. 2004-08-18T02:14:07.31 10.0 undecidable manual PN 321 0.017 1.52 0.3
--.FAVR.Z. 2004-08-18T02:14:04.84 10.0 undecidable manual PN 295 0.0156 1.08 0.6
--.MNO.Z. 2004-08-18T02:14:03.77 10.0 undecidable manual PN? 331 0.0143 1.98 0
--.MSRU.Z. 2004-08-18T02:14:03.11 10.0 undecidable manual PN 356 0.0157 -0.67 1.1
--.SSY.N. 2004-08-18T02:14:01.14 10.0 undecidable manual SG 324 0.007 0.35 0.6
--.AGST.E. 2004-08-18T02:14:01.19 10.0 undecidable manual SG 335 0.0072 -0.4 0.6
--.MMME.Z. 2004-08-18T02:13:59.30 10.0 undecidable manual PN 347 0.013 -0.66 1.2
--.ECTS.Z. 2004-08-18T02:13:59.72 10.0 undecidable manual PN 342 0.0128 0.37 1.5
--.WDD.Z. 2004-08-18T02:13:54.20 10.0 undecidable manual PN 234 0.01 -0.87 1
--.PZI.Z. 2004-08-18T02:13:49.10 10.0 undecidable manual PG 313 0.0069 -0.06 1.7
--.AGST.Z. 2004-08-18T02:13:48.91 10.0 undecidable manual PG 335 0.0072 -0.92 0.9
--.SSY.Z. 2004-08-18T02:13:48.82 10.0 negative manual PG 324 0.007 -0.54 2.8
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