Earthquake with magnitude of Md 3.1 on date 21-10-1999 and time 00:19:09 (Italy) in region Mar Ionio Meridionale (MARE)

A magnitude Md 3.1 earthquake occured in region: Mar Ionio Meridionale (MARE), on

  • 20-10-1999 22:19:09 (UTC)
  • 21-10-1999 00:19:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.171, 15.99 at 5 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
63 Km E of Siracusa (122291 inhabitants)
88 Km SE of Acireale (52622 inhabitants)
88 Km E of Catania (314555 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 3.1
ML-VAX 2.9
1999-10-20
22:19:09
37.171 15.99 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 375969
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1999-10-20 22:19:09 ± 0.448
Latitude 37.1710 ± 0.0248
Longitude 15.9900 ± 0.0309
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 375969

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) 3884.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 255
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00777
Epicentral distance of station farthest from the epicenter (degree) 0.04258
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 21
Magnitudes information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 13
Type of magnitude Md
Reference to an origin 375969
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:53:00

ML:2.9

Field Value
Value 2.9
Uncertainty
Num. used stations 16
Type of magnitude ML
Reference to an origin 375969
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
--.SGO.Z. 1999-10-20T22:20:42.54 10.0 undecidable manual SN 350 0.0308 -0.38 0.4
--.CRVI.Z. 1999-10-20T22:20:21.74 10.0 undecidable manual PN 343 0.0426 0.39 0.8
--.PSB1.Z. 1999-10-20T22:20:14.76 10.0 undecidable manual PN 346 0.0373 1.37 0.2
--.CI9.Z. 1999-10-20T22:20:09.13 10.0 undecidable manual PN 348 0.0338 1.07 0.4
--.MU9.Z. 1999-10-20T22:20:07.80 10.0 undecidable manual PN 353 0.0325 1.13 0.4
--.SGO.Z. 1999-10-20T22:20:03.75 10.0 undecidable manual PN 350 0.0308 0.3 1.1
--.GIB.Z. 1999-10-20T22:20:03.52 10.0 undecidable manual SN 297 0.0158 0.34 0.5
--.SA1.Z. 1999-10-20T22:20:01.65 10.0 undecidable manual SN 326 0.015 0.68 0.4
--.LCI.Z. 1999-10-20T22:20:01.26 10.0 undecidable manual PN! 26 0.0321 -4.13 0
--.SL9.Z. 1999-10-20T22:20:00.15 10.0 undecidable manual PN 354 0.0291 -0.59 0.8
--.ORI.Z. 1999-10-20T22:19:56.90 10.0 undecidable manual PN 6 0.0261 -0.12 1.2
--.TDS.Z. 1999-10-20T22:19:50.52 10.0 undecidable manual PN 5 0.0225 -0.23 1.3
--.CLTB.Z. 1999-10-20T22:19:48.13 10.0 undecidable manual PN 280 0.0202 0.96 0.5
--.MEU.Z. 1999-10-20T22:19:42.00 10.0 undecidable manual SG 265 0.0083 -0.16 0.6
--.SOI.Z. 1999-10-20T22:19:41.22 10.0 undecidable manual SG 2 0.0081 -0.22 0.5
--.FAVR.Z. 1999-10-20T22:19:41.25 10.0 undecidable manual PN 273 0.0166 -0.55 1.2
--.GIB.Z. 1999-10-20T22:19:40.90 10.0 negative manual PN 297 0.0158 0.38 2.5
--.CS9.Z. 1999-10-20T22:19:40.70 10.0 negative manual PN 296 0.0153 0.3 2.6
--.MO9.Z. 1999-10-20T22:19:40.90 10.0 undecidable manual SG 343 0.0078 -0.05 0.6
--.SA1.Z. 1999-10-20T22:19:39.37 10.0 positive manual PN 326 0.015 0.13 3
--.GRI.Z. 1999-10-20T22:19:39.82 10.0 undecidable manual PN 10 0.0151 0.29 1.5
--.MNO.Z. 1999-10-20T22:19:33.32 10.0 undecidable manual PN 306 0.0115 -0.63 1.1
--.MSI.Z. 1999-10-20T22:19:30.41 10.0 undecidable manual PN 340 0.0097 -0.92 0.6
--.GMB.Z. 1999-10-20T22:19:28.81 10.0 undecidable manual PG 352 0.009 -1.03 0.4
--.MO9.Z. 1999-10-20T22:19:27.16 10.0 negative manual PG 343 0.0078 -0.06 3
--.SOI.Z. 1999-10-20T22:19:27.28 10.0 undecidable manual PG 2 0.0081 -0.68 0.8
--.MEU.Z. 1999-10-20T22:19:27.00 10.0 negative manual PG 265 0.0083 -1.38 0.7
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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