Earthquake with magnitude of Md 4.0 on date 25-12-1985 and time 02:38:57 (UTC) in region Costa Catanese (Catania)

A magnitude Md 4.0 earthquake occured in region: Costa Catanese (Catania), on

  • 25-12-1985 02:38:57 (UTC)
  • 25-12-1985 03:38:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.62, 15.45 at 16 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
25 Km E of Acireale (52622 inhabitants)
34 Km E of Catania (314555 inhabitants)
57 Km S of Reggio di Calabria (183035 inhabitants)
64 Km N of Siracusa (122291 inhabitants)
64 Km S of Messina (238439 inhabitants)
100 Km NE 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
Rev 1000 Md 4.0 1985-12-25
02:38:57
37.62 15.45 16 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 18829
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-12-25 02:38:57 ± 0.361
Latitude 37.62 ± 0.03
Longitude 15.45 ± 0.04
Depth (km) 16 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 18829

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) 4417
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 31
Number of defining phases 31
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) 0.00453
Epicentral distance of station farthest from the epicenter (degree) 0.0803
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 31
Magnitude information

Md:4

Field Value
Value 4
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 18829
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:21:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.RBL.Z. 1985-12-25T02:41:05.50 10.0 undecidable manual PN 351 0.0803 0.07 0.8
--.CTI.Z. 1985-12-25T02:41:05.00 10.0 undecidable manual PN 342 0.0799 0.13 0.8
--.PS9.Z. 1985-12-25T02:40:42.50 10.0 undecidable manual PN 330 0.0643 1.45 0.1
--.ARV.Z. 1985-12-25T02:40:28.50 10.0 undecidable manual PN 343 0.0555 0.82 0.6
--.ASS.Z. 1985-12-25T02:40:24.00 10.0 undecidable manual PN 339 0.0525 0.91 0.5
--.AQU.Z. 1985-12-25T02:40:12.00 10.0 undecidable manual PN 342 0.0448 0.68 0.8
--.SD1.Z. 1985-12-25T02:40:01.00 10.0 undecidable manual PN 343 0.0384 -0.61 0.9
--.DUI.Z. 1985-12-25T02:39:59.00 10.0 undecidable manual PN 349 0.0369 -0.29 1.3
--.SGG.Z. 1985-12-25T02:39:55.40 10.0 undecidable manual PN 348 0.0346 -0.4 1.2
--.BAI.Z. 1985-12-25T02:39:53.00 10.0 undecidable manual PN 17 0.0329 -0.1 1.4
--.MSC.Z. 1985-12-25T02:39:53.00 10.0 undecidable manual PN 342 0.0337 -1.34 0.3
--.BRT.Z. 1985-12-25T02:39:52.00 10.0 undecidable manual PN 21 0.0315 0.94 0.6
--.PE1.Z. 1985-12-25T02:39:51.00 10.0 undecidable manual PN 25 0.0317 -0.39 1.3
--.TR9.Z. 1985-12-25T02:39:50.00 10.0 undecidable manual PN 357 0.0308 0.03 1.5
--.LCI.Z. 1985-12-25T02:39:50.00 10.0 undecidable manual PN 36 0.0307 0.25 1.4
--.OVO.Z. 1985-12-25T02:39:49.00 10.0 undecidable manual PN 346 0.0297 0.71 0.9
--.SGO.Z. 1985-12-25T02:39:43.00 10.0 undecidable manual PN 358 0.0264 -0.26 1.4
--.PT9.Z. 1985-12-25T02:39:41.50 10.0 undecidable manual PN 254 0.0257 -0.8 0.8
--.ORI.Z. 1985-12-25T02:39:39.00 10.0 undecidable manual PN 17 0.0229 1.09 0.5
--.CSI.Z. 1985-12-25T02:39:34.00 10.0 undecidable manual PN 16 0.0203 0.05 1.5
--.ERC.Z. 1985-12-25T02:39:34.00 10.0 undecidable manual PN 281 0.0206 -0.44 1.2
--.MMN.Z. 1985-12-25T02:39:33.90 10.0 undecidable manual PN 10 0.0207 -0.68 1
--.ROI.Z. 1985-12-25T02:39:33.20 10.0 undecidable manual PN 23 0.0192 0.95 0.6
--.CV9.Z. 1985-12-25T02:39:32.00 10.0 undecidable manual PN 272 0.0189 0.22 1.4
--.CZI.Z. 1985-12-25T02:39:24.40 10.0 undecidable manual PN 18 0.0151 -1.64 0.1
--.FAI.Z. 1985-12-25T02:39:22.50 10.0 undecidable manual PN 256 0.013 -0.38 1.3
--.DR2.Z. 1985-12-25T02:39:16.90 10.0 undecidable manual PN 20 0.0098 -1 0.6
--.PZI.Z. 1985-12-25T02:39:12.00 10.0 undecidable manual PG 215 0.0062 0.5 1.2
--.GA2.Z. 1985-12-25T02:39:10.30 10.0 undecidable manual PG 28 0.0056 0.08 1.5
--.MSI.Z. 1985-12-25T02:39:09.00 10.0 negative manual PG 8 0.0053 -0.54 2.3
--.RCI.Z. 1985-12-25T02:39:08.50 10.0 undecidable manual PG 17 0.0045 0.43 1.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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