Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of M 4.1 on date 16-04-1985 and time 12:46:45 (UTC) in region Greece [Land]

A magnitude M 4.1 earthquake occured in region: Greece [Land], on

  • 16-04-1985 12:46:45 (UTC)
  • 16-04-1985 14:46:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 39.7430, 20.8260 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 4.1 1985-04-16
12:46:45		 39.743 20.826 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 4769
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-16 12:46:45 ± 0.602
Latitude 39.7430 ± 0.0422
Longitude 20.8260 ± 0.0471
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 4769

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) 6186.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 189
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 34
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) 0.00583
Epicentral distance of station farthest from the epicenter (degree) 0.09997
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 30
Magnitude information

M:4.1

Field Value
Value 4.1
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 4769
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
--.VAI.N. 1985-04-16T12:51:10.50 10.0 undecidable manual SN 308 0.0967 -1.25 0.2
--.AR1.Z. 1985-04-16T12:49:43.00 10.0 undecidable manual SN 304 0.0628 0.66 0.5
--.ALP.Z. 1985-04-16T12:49:25.00 10.0 undecidable manual SN 300 0.0561 0.31 0.9
--.ORO.Z. 1985-04-16T12:49:24.00 10.0 undecidable manual PN 305 0.1000 -0.41 1
--.VAI.Z. 1985-04-16T12:49:21.00 10.0 undecidable manual PN 308 0.0967 1.63 0.4
--.SAL.Z. 1985-04-16T12:49:04.00 10.0 undecidable manual PN 310 0.0860 0.77 0.9
--.CTI.Z. 1985-04-16T12:48:58.50 10.0 positive manual PN 315 0.0828 0.22 2.4
--.FO1.Z. 1985-04-16T12:48:53.00 10.0 undecidable manual PN? 321 0.0810 -2.6 0
--.RBL.Z. 1985-04-16T12:48:48.00 10.0 undecidable manual PN 323 0.0767 -1.05 0.8
--.TRI.Z. 1985-04-16T12:48:41.00 10.0 undecidable manual PN 320 0.0711 0.67 1.1
--.AS1.Z. 1985-04-16T12:48:30.50 10.0 undecidable manual PN? 300 0.0627 2.98 0
--.AR1.Z. 1985-04-16T12:48:28.50 10.0 undecidable manual PN 304 0.0628 0.75 1.2
--.MNS.Z. 1985-04-16T12:48:24.00 10.0 undecidable manual PN 295 0.0601 0.4 1.4
--.AQU.Z. 1985-04-16T12:48:18.50 10.0 undecidable manual PN 296 0.0555 1.86 0.4
--.ALP.Z. 1985-04-16T12:48:16.40 10.0 undecidable manual PN 300 0.0561 -1.16 1.8
--.SD1.Z. 1985-04-16T12:48:11.00 10.0 undecidable manual PN 292 0.0509 1.34 0.8
--.GIB.Z. 1985-04-16T12:48:09.50 10.0 undecidable manual PN 253 0.0501 1.09 1
--.PA1.Z. 1985-04-16T12:48:06.00 10.0 undecidable manual PN 240 0.0482 0.44 1.5
--.DUI.Z. 1985-04-16T12:48:04.00 10.0 undecidable manual PN 293 0.0467 0.85 1.2
--.SOR.Z. 1985-04-16T12:47:59.00 10.0 undecidable manual PN 281 0.0452 -1.91 0.4
--.BS1.Z. 1985-04-16T12:47:55.50 10.0 undecidable manual PN 284 0.0422 -0.81 1.3
--.SAR.Z. 1985-04-16T12:47:53.90 10.0 undecidable manual PN 336 0.0405 0.25 1.6
--.TR9.Z. 1985-04-16T12:47:51.60 10.0 undecidable manual PN 288 0.0401 -1.44 0.7
--.SGO.Z. 1985-04-16T12:47:51.00 10.0 undecidable manual PN 282 0.0386 0.16 1.6
--.BAI.Z. 1985-04-16T12:47:35.50 10.0 undecidable manual PN 295 0.0296 -1.68 0.5
--.BRT.Z. 1985-04-16T12:47:33.00 10.0 undecidable manual PN 292 0.0272 -0.39 1.5
--.PE1.Z. 1985-04-16T12:47:31.00 10.0 undecidable manual PN 292 0.0252 0.61 1.4
--.ULC.Z. 1985-04-16T12:47:26.60 10.0 undecidable manual PN 331 0.0227 0.12 1.6
--.LCI.Z. 1985-04-16T12:47:22.50 10.0 undecidable manual PN 286 0.0194 0.95 1.1
--.KBN.Z. 1985-04-16T12:47:17.50 10.0 undecidable manual SG 357 0.0079 1.46 0.3
--.VLO.Z. 1985-04-16T12:47:09.20 10.0 undecidable manual PN 305 0.0112 0.14 1.6
--.KZN.Z. 1985-04-16T12:47:03.50 10.0 undecidable manual PG 51 0.0082 -0.44 1.5
--.KBN.Z. 1985-04-16T12:47:01.80 10.0 undecidable manual PG 357 0.0079 -1.48 0.7
--.SRN.Z. 1985-04-16T12:46:57.10 10.0 undecidable manual PG 281 0.0058 -1.88 0.4
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download