Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of M 4.2 on date 16-04-1985 and time 00:40:25 (UTC) in region Greece [Land]

A magnitude M 4.2 earthquake occured in region: Greece [Land], on

  • 16-04-1985 00:40:25 (UTC)
  • 16-04-1985 02:40:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 39.7840, 20.7200 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 4.2 1985-04-16
00:40:25		 39.784 20.72 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 4709
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-16 00:40:25 ± 0.256
Latitude 39.7840 ± 0.0245
Longitude 20.7200 ± 0.0252
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 4709

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) 3470.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 78
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 30
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) 0.00858
Epicentral distance of station farthest from the epicenter (degree) 0.08532
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 27
Magnitude information

M:4.2

Field Value
Value 4.2
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 4709
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. 1985-04-16T00:43:43.50 10.0 undecidable manual SN 322 0.0703 1.13 0.2
--.ALP.Z. 1985-04-16T00:43:05.40 10.0 undecidable manual SN? 302 0.0553 2.74 0
--.SAL.Z. 1985-04-16T00:42:41.50 10.0 undecidable manual PN 312 0.0853 -0.69 0.8
--.FO1.Z. 1985-04-16T00:42:36.00 10.0 undecidable manual PN 323 0.0804 1.35 0.3
--.RBL.Z. 1985-04-16T00:42:28.00 10.0 undecidable manual PN 325 0.0761 -0.11 1.2
--.TRI.Z. 1985-04-16T00:42:18.00 10.0 undecidable manual PN 322 0.0703 -1.36 0.3
--.SGO.Z. 1985-04-16T00:42:15.00 10.0 undecidable manual SN 283 0.0378 -1.4 0.1
--.CEY.Z. 1985-04-16T00:42:14.10 10.0 undecidable manual PN 325 0.0678 -1.34 0.3
--.AS1.Z. 1985-04-16T00:42:07.00 10.0 undecidable manual PN 301 0.0618 0.6 1
--.AR1.Z. 1985-04-16T00:42:06.00 10.0 undecidable manual PN 305 0.0620 -0.64 1
--.MNS.Z. 1985-04-16T00:42:03.50 10.0 undecidable manual PN 296 0.0593 1.04 0.6
--.ALP.Z. 1985-04-16T00:41:56.00 10.0 undecidable manual PN 302 0.0553 -0.43 1.2
--.AQU.Z. 1985-04-16T00:41:56.00 10.0 undecidable manual PN 298 0.0547 0.5 1.2
--.MSC.Z. 1985-04-16T00:41:44.80 10.0 undecidable manual PN 288 0.0478 -0.21 1.5
--.PA1.Z. 1985-04-16T00:41:44.00 10.0 undecidable manual PN 241 0.0478 -0.97 0.8
--.SGG.Z. 1985-04-16T00:41:42.90 10.0 undecidable manual PN 291 0.0456 1.27 0.5
--.OVO.Z. 1985-04-16T00:41:40.20 10.0 undecidable manual PN 284 0.0444 0.53 1.3
--.SOR.Z. 1985-04-16T00:41:39.50 10.0 undecidable manual PN 282 0.0444 -0.3 1.4
--.SAR.Z. 1985-04-16T00:41:34.10 10.0 undecidable manual PN 338 0.0398 1.28 0.9
--.TR9.Z. 1985-04-16T00:41:31.80 10.0 undecidable manual PN 289 0.0393 -0.1 1.5
--.SGO.Z. 1985-04-16T00:41:30.00 10.0 undecidable manual PN 283 0.0378 0.28 1.5
--.BAI.Z. 1985-04-16T00:41:15.40 10.0 negative manual PN 296 0.0288 -0.63 1.1
--.ATH.Z. 1985-04-16T00:41:13.50 10.0 undecidable manual PN 127 0.0266 0.97 0.8
--.BRT.Z. 1985-04-16T00:41:12.00 10.0 undecidable manual PN 293 0.0263 -0.24 1.5
--.TTG.Z. 1985-04-16T00:41:12.00 10.0 undecidable manual PN 338 0.0257 0.68 1.1
--.BDV.Z. 1985-04-16T00:41:11.50 10.0 undecidable manual PN 331 0.0258 0 1.5
--.PE1.Z. 1985-04-16T00:41:08.50 10.0 undecidable manual PN 293 0.0244 -0.74 1
--.LCI.Z. 1985-04-16T00:41:00.00 10.0 undecidable manual PN 286 0.0186 -0.41 1.4
--.VLS.Z. 1985-04-16T00:40:54.50 10.0 undecidable manual PN 184 0.0144 0.4 1.4
--.KZN.Z. 1985-04-16T00:40:44.00 10.0 undecidable manual PG 57 0.0086 -0.83 1.8
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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