Earthquake with magnitude of Md 4.5 on date 20-05-1985 and time 07:51:16 (UTC) in region Costa Greca Ionica (GRECIA)

A magnitude Md 4.5 earthquake occured in region: Costa Greca Ionica (GRECIA), on

  • 20-05-1985 07:51:16 (UTC)
  • 20-05-1985 09:51:16 (UTC +02:00) Italian time
  • 20-05-1985 10:51:16 (UTC +03:00) local time in the region of the earthquake (Europe/Athens)

and geographic coordinates (lat, lon) 38.2, 20.34 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

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 Md 4.5
M 4.2
1985-05-20
07:51:16
38.2 20.34 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 6729
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-05-20 07:51:16 ± 0.477
Latitude 38.20 ± 0.04
Longitude 20.34 ± 0.04
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 6729

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) 5634.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 174
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00178
Epicentral distance of station farthest from the epicenter (degree) 0.09843
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 31
Magnitudes information

Md:4.5

Field Value
Value 4.5
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 6729
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:11:02

M:4.2

Field Value
Value 4.2
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 6729
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
--.SAL.Z. 1985-05-20T07:55:32.50 10.0 undecidable manual SN? 319 0.0936 -1.2 0
--.CTI.Z. 1985-05-20T07:55:26.50 10.0 undecidable manual SN 323 0.0913 -1.34 0.2
--.RBL.Z. 1985-05-20T07:55:15.00 10.0 undecidable manual SN 331 0.0867 -0.71 0.4
--.BG1.Z. 1985-05-20T07:53:53.00 10.0 undecidable manual PN 317 0.0984 0.76 0.9
--.SAL.Z. 1985-05-20T07:53:43.50 10.0 undecidable manual PN? 319 0.0936 -1.29 0.2
--.CTI.Z. 1985-05-20T07:53:39.50 10.0 undecidable manual PN 323 0.0913 -1.91 0.2
--.RBL.Z. 1985-05-20T07:53:32.50 10.0 undecidable manual PN 331 0.0867 -1.91 0.2
--.CH1.Z. 1985-05-20T07:53:18.00 10.0 undecidable manual PN 313 0.075 1.4 0.5
--.SGO.Z. 1985-05-20T07:53:13.50 10.0 undecidable manual SN 303 0.0409 -1.09 0.5
--.AR1.Z. 1985-05-20T07:53:07.50 10.0 negative manual PN 316 0.0693 -0.31 2.6
--.AS1.Z. 1985-05-20T07:53:07.50 10.0 undecidable manual PN 312 0.0683 1.23 0.7
--.CM2.Z. 1985-05-20T07:53:03.60 10.0 undecidable manual PN 315 0.0665 0.04 1.4
--.MNS.Z. 1985-05-20T07:53:01.00 10.0 undecidable manual PN 308 0.0646 0.34 1.4
--.ALP.Z. 1985-05-20T07:52:57.50 10.0 negative manual PN 314 0.062 0.85 2.1
--.AQU.Z. 1985-05-20T07:52:54.50 10.0 undecidable manual PN 310 0.0605 0.11 1.5
--.SD1.Z. 1985-05-20T07:52:46.00 10.0 undecidable manual PN 307 0.055 0.06 1.6
--.DUI.Z. 1985-05-20T07:52:41.00 10.0 undecidable manual PN 309 0.0511 0.94 1.1
--.SGG.Z. 1985-05-20T07:52:40.60 10.0 undecidable manual PN 307 0.0502 1.98 0.3
--.MSC.Z. 1985-05-20T07:52:39.90 10.0 undecidable manual PN 303 0.0516 -0.93 1
--.OVO.Z. 1985-05-20T07:52:36.20 10.0 undecidable manual PN 301 0.0475 1.65 0.5
--.SOR.Z. 1985-05-20T07:52:33.10 10.0 undecidable manual PN 299 0.0469 -0.52 1.4
--.BS1.Z. 1985-05-20T07:52:31.50 10.0 undecidable manual PN 303 0.0447 1.18 0.9
--.GIB.Z. 1985-05-20T07:52:29.50 10.0 undecidable manual PN 269 0.0447 -0.73 1.2
--.MS1.Z. 1985-05-20T07:52:28.50 10.0 undecidable manual PN 317 0.0437 -0.31 1.5
--.SGO.Z. 1985-05-20T07:52:26.00 10.0 undecidable manual PN 303 0.0409 1.52 0.6
--.BAI.Z. 1985-05-20T07:52:16.00 10.0 undecidable manual PN 318 0.0355 -0.2 1.6
--.BRT.Z. 1985-05-20T07:52:11.00 10.0 undecidable manual PN 318 0.0327 -0.95 1
--.RCI.Z. 1985-05-20T07:52:11.50 10.0 undecidable manual PN 270 0.0332 -1.2 0.8
--.ORI.Z. 1985-05-20T07:52:10.50 10.0 undecidable manual PN 302 0.0318 -0.19 1.6
--.SRN.Z. 1985-05-20T07:52:06.70 10.0 undecidable manual SN 351 0.0153 -0.32 0.6
--.LCI.Z. 1985-05-20T07:51:59.00 10.0 undecidable manual PN 322 0.0247 -0.74 1.2
--.KZN.Z. 1985-05-20T07:51:56.50 10.0 undecidable manual PN 27 0.0215 1.69 0.4
--.KBN.Z. 1985-05-20T07:51:56.40 10.0 undecidable manual PN 8 0.022 0.67 1.3
--.VLO.Z. 1985-05-20T07:51:54.00 10.0 undecidable manual PN 344 0.0212 -0.52 1.4
--.SRN.Z. 1985-05-20T07:51:45.10 10.0 undecidable manual PN 351 0.0153 -0.37 1.5
--.VLS.Z. 1985-05-20T07:51:20.00 10.0 undecidable manual PG 95 0.0018 -0.85 1.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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