Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of M 5.0 on date 31-08-1985 and time 08:03:31 (Italy) in region Greece

A magnitude M 5.0 earthquake occured in region: Greece, on

  • 31-08-1985 06:03:31 (UTC)
  • 31-08-1985 08:03:31 (UTC +02:00) Italian time
  • 31-08-1985 09:03:31 (UTC +03:00) local time in the region of the earthquake (Europe/Athens)

and geographic coordinates (lat, lon) 38.5880, 22.0020 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
Bulletin
Rev1000 		M 5.0 1985-08-31
06:03:31		 38.588 22.002 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 12509
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-08-31 06:03:31 ± 1.961
Latitude 38.5880 ± 0.0545
Longitude 22.0020 ± 0.1873
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 12509

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) 17372.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 292
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.03116
Epicentral distance of station farthest from the epicenter (degree) 0.10078
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:5.0

Field Value
Value 5.0
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 12509
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(km) Takeoff_angle Residual Weight
--.FO1.Z. 1985-08-31T06:07:51.00 10.0 undecidable manual SN 320 10.4562 -0.47 0.7
--.RBL.Z. 1985-08-31T06:07:42.00 10.0 undecidable manual SN 321 9.9789 1.9 0.1
--.CO9.Z. 1985-08-31T06:06:12.50 10.0 undecidable manual PN 305 11.1888 0.72 0.9
--.CTI.Z. 1985-08-31T06:06:04.50 10.0 undecidable manual PN? 315 10.6449 0.12 0.5
--.FO1.Z. 1985-08-31T06:06:01.00 10.0 undecidable manual PN? 320 10.4562 -0.77 0.4
--.RBL.Z. 1985-08-31T06:05:56.00 10.0 undecidable manual PN 321 9.9789 0.79 0.9
--.PS9.Z. 1985-08-31T06:05:55.00 10.0 undecidable manual PN 301 10.0233 -0.69 1
--.TRI.Z. 1985-08-31T06:05:47.50 10.0 undecidable manual PN 319 9.3573 0.98 0.8
--.MA1.Z. 1985-08-31T06:05:44.50 10.0 undecidable manual PN 295 9.0687 1.9 0.2
--.AR1.Z. 1985-08-31T06:05:32.50 10.0 undecidable manual PN 306 8.3916 -0.78 1
--.MNS.Z. 1985-08-31T06:05:28.00 10.0 undecidable manual PN 298 8.0142 -0.19 1.4
--.RDP.Z. 1985-08-31T06:05:23.00 10.0 undecidable manual PN 294 7.7478 -1.49 0.4
--.AQU.Z. 1985-08-31T06:05:22.00 10.0 undecidable manual PN 300 7.5258 0.56 1.3
--.SD1.Z. 1985-08-31T06:05:14.50 10.0 undecidable manual PN 296 6.9708 0.63 1.2
--.SGG.Z. 1985-08-31T06:05:07.50 10.0 undecidable manual PN 295 6.4602 0.74 1.1
--.GIB.Z. 1985-08-31T06:05:06.00 10.0 undecidable manual PN 264 6.2715 1.79 0.2
--.OVO.Z. 1985-08-31T06:05:03.60 10.0 undecidable manual PN 290 6.2493 -0.25 1.5
--.PA1.Z. 1985-08-31T06:04:58.00 10.0 undecidable manual PN? 254 5.7942 0.32 0.6
--.TR9.Z. 1985-08-31T06:04:56.50 10.0 undecidable manual PN 294 5.7276 -0.34 1.4
--.SGO.Z. 1985-08-31T06:04:53.50 10.0 negative manual PN 290 5.5056 -0.2 3
--.MS1.Z. 1985-08-31T06:04:53.50 10.0 undecidable manual PN 303 5.5722 -1.01 0.8
--.DR2.Z. 1985-08-31T06:04:43.60 10.0 undecidable manual PN 270 4.7286 0.58 2.5
--.BAI.Z. 1985-08-31T06:04:41.00 10.0 undecidable manual PN 301 4.6509 -1 0.8
--.CSI.Z. 1985-08-31T06:04:40.20 10.0 undecidable manual PN 284 4.5732 -0.62 1.2
--.ORI.Z. 1985-08-31T06:04:39.00 10.0 undecidable manual PN 288 4.5288 -1.25 0.6
--.BRT.Z. 1985-08-31T06:04:37.00 10.0 undecidable manual PN 300 4.3623 -0.98 0.9
--.ROI.Z. 1985-08-31T06:04:36.50 10.0 undecidable manual PN 282 4.3179 -0.88 1
--.LCI.Z. 1985-08-31T06:04:25.50 10.0 undecidable manual PN 298 3.4632 -0.09 1.5
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