Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of M 4.3 on date 23-01-1985 and time 17:11:34 (Italy) in region Costa Greca Ionica (GRECIA)

A magnitude M 4.3 earthquake occured in region: Costa Greca Ionica (GRECIA), on

  • 23-01-1985 16:11:34 (UTC)
  • 23-01-1985 17:11:34 (UTC +01:00) Italian time
  • 23-01-1985 18:11:34 (UTC +02:00) local time in the region of the earthquake (Europe/Athens)

and geographic coordinates (lat, lon) 38.17, 20.62 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.

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Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

No Italian municipalities within 100 km from the epicenter with at least 50000 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 M 4.3 1985-01-23
16:11:34		 38.17 20.62 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 769
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-01-23 16:11:34 ± 0.944
Latitude 38.17 ± 0.07
Longitude 20.62 ± 0.06
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 769

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) 9018.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 232
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
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) 0.02606
Epicentral distance of station farthest from the epicenter (degree) 0.10782
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 26
Magnitude information

M:4.3

Field Value
Value 4.3
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 769
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:54:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.TRI.Z. 1985-01-23T16:15:21.00 10.0 undecidable manual SN 326 0.0818 -0.53 0.4
--.ORO.Z. 1985-01-23T16:14:24.00 10.0 undecidable manual PN 311 0.1078 -1.46 0.3
--.STV.Z. 1985-01-23T16:14:22.50 10.0 undecidable manual PN 304 0.1051 1.16 0.4
--.SAL.Z. 1985-01-23T16:14:06.50 10.0 undecidable manual PN 316 0.095 0.61 0.8
--.RBL.Z. 1985-01-23T16:13:55.50 10.0 undecidable manual PN 328 0.0878 0.46 1
--.TRI.Z. 1985-01-23T16:13:45.00 10.0 undecidable manual PN 326 0.0818 -0.77 0.8
--.PA1.Z. 1985-01-23T16:13:35.00 10.0 undecidable manual SN 256 0.0418 -1.17 0.3
--.AR1.Z. 1985-01-23T16:13:28.50 10.0 undecidable manual PN 313 0.0708 -0.57 1
--.PO9.Z. 1985-01-23T16:13:23.50 10.0 undecidable manual PN 307 0.0658 2.11 0.1
--.MNS.Z. 1985-01-23T16:13:22.00 10.0 undecidable manual PN 305 0.0663 -0.17 1.3
--.AQU.Z. 1985-01-23T16:13:17.00 10.0 undecidable manual PN 307 0.0622 1.16 0.6
--.SKO.Z. 1985-01-23T16:13:15.00 10.0 undecidable manual SN 7 0.0346 -2.03 0.1
--.VAY.Z. 1985-01-23T16:13:08.20 10.0 undecidable manual SN 23 0.0313 -0.2 0.8
--.SD1.Z. 1985-01-23T16:13:07.50 10.0 undecidable manual PN 304 0.0567 0.01 1.4
--.DUI.Z. 1985-01-23T16:13:01.50 10.0 undecidable manual PN 306 0.0528 -0.05 1.4
--.SGG.Z. 1985-01-23T16:12:59.80 10.0 undecidable manual PN 304 0.0519 -0.39 1.3
--.OVO.Z. 1985-01-23T16:12:56.60 10.0 undecidable manual PN 299 0.0493 0.36 1.3
--.SOR.Z. 1985-01-23T16:12:54.60 10.0 undecidable manual PN 296 0.0487 -0.77 1
--.BS1.Z. 1985-01-23T16:12:52.50 10.0 negative manual PN 300 0.0465 0.51 2.5
--.GIB.Z. 1985-01-23T16:12:52.00 10.0 undecidable manual PN? 268 0.0466 -0.23 0.6
--.SGO.Z. 1985-01-23T16:12:47.50 10.0 undecidable manual PN 300 0.0427 1.34 0.5
--.SKO.Z. 1985-01-23T16:12:33.30 10.0 undecidable manual PN 7 0.0346 -0.59 2.3
--.PA1.Z. 1985-01-23T16:12:43.30 10.0 undecidable manual PN 256 0.0418 -1.64 0.3
--.VAY.Z. 1985-01-23T16:12:33.50 10.0 undecidable manual U
--.BAI.Z. 1985-01-23T16:12:36.00 10.0 undecidable manual PN 315 0.0369 -1.42 0.4
--.CSI.Z. 1985-01-23T16:12:33.50 10.0 undecidable manual PN 295 0.0335 1.34 0.5
--.ORI.Z. 1985-01-23T16:12:31.50 10.0 undecidable manual PN 299 0.0337 -0.88 0.9
--.VAY.Z. 1985-01-23T16:12:29.60 10.0 undecidable manual PN 23 0.0313 0.7 2.2
--.ROI.Z. 1985-01-23T16:12:28.10 10.0 undecidable manual PN 293 0.031 -0.25 1.4
--.OHR.Z. 1985-01-23T16:12:21.70 10.0 undecidable manual PN 1 0.0265 0.29 2.7
--.LCI.Z. 1985-01-23T16:12:21.00 10.0 undecidable manual PN 317 0.0261 0.13 1.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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