Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 3.4 on date 07-08-1987 and time 17:57:49 (Italy) in region Costa Occidentale Peloponneso (GRECIA)

A magnitude Md 3.4 earthquake occured in region: Costa Occidentale Peloponneso (GRECIA), on

  • 07-08-1987 15:57:49 (UTC)
  • 07-08-1987 17:57:49 (UTC +02:00) Italian time
  • 07-08-1987 18:57:49 (UTC +03:00) local time in the region of the earthquake (Europe/Athens)

and geographic coordinates (lat, lon) 37.2330, 21.3030 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 		Md 3.4
M 4.1 		1987-08-07
15:57:49		 37.233 21.303 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 53549
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-08-07 15:57:49 ± 0.453
Latitude 37.2330 ± 0.0310
Longitude 21.3030 ± 0.0303
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 53549

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) 4363.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 201
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) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.01837
Epicentral distance of station farthest from the epicenter (degree) 0.06095
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 24
Magnitudes information

Md:3.4

Field Value
Value 3.4
Uncertainty
Num. used stations 9
Type of magnitude Md
Reference to an origin 53549
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:51:38

M:4.1

Field Value
Value 4.1
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 53549
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
--.ATN.Z. 1987-08-07T15:59:52.36 10.0 undecidable manual SN 284 4.6953 0.07 0.6
--.TIR.Z. 1987-08-07T15:59:41.50 10.0 undecidable manual SN 346 4.2513 -0.15 0.6
--.SGG.Z. 1987-08-07T15:59:29.70 10.0 undecidable manual PN 311 6.771 0.76 0.7
--.SOR.Z. 1987-08-07T15:59:23.50 10.0 undecidable manual PN 305 6.3603 0.16 1.3
--.KBN.Z. 1987-08-07T15:59:22.00 10.0 undecidable manual SN 354 3.4077 0.52 0.5
--.TR9.Z. 1987-08-07T15:59:20.50 10.0 undecidable manual PN 312 6.0495 1.43 0.2
--.SGO.Z. 1987-08-07T15:59:14.69 10.0 undecidable manual PN 308 5.7276 0.16 1.4
--.MGR.Z. 1987-08-07T15:59:09.63 10.0 undecidable manual PN 306 5.3391 0.39 1.3
--.MNO.Z. 1987-08-07T15:59:08.53 10.0 undecidable manual PN 281 5.2725 0.18 1.5
--.SRN.Z. 1987-08-07T15:59:07.30 10.0 undecidable manual SN 340 2.8305 -0.43 0.5
--.BCI.Z. 1987-08-07T15:59:06.70 10.0 undecidable manual PN 351 5.2059 -0.84 0.7
--.MEU.Z. 1987-08-07T15:59:05.33 10.0 undecidable manual PN 272 5.1504 -1.31 0.3
--.PZI.Z. 1987-08-07T15:59:04.43 10.0 undecidable manual PN 271 5.0616 -0.98 0.6
--.MMN.Z. 1987-08-07T15:59:04.20 10.0 undecidable manual PN 305 4.9284 0.65 1
--.SDA.Z. 1987-08-07T15:59:03.80 10.0 undecidable manual PN 345 4.9728 -0.45 1.3
--.BRT.Z. 1987-08-07T15:59:02.43 10.0 undecidable manual PN 321 4.8507 -0.23 1.5
--.ATN.Z. 1987-08-07T15:59:00.36 10.0 undecidable manual PN 284 4.6953 -0.17 1.6
--.ORI.Z. 1987-08-07T15:59:00.53 10.0 undecidable manual PN 309 4.7175 -0.22 1.5
--.SKO.Z. 1987-08-07T15:58:59.50 10.0 undecidable manual PN 2 4.7286 -1.42 0.2
--.TS9.Z. 1987-08-07T15:58:59.76 10.0 undecidable manual PN 305 4.5732 0.98 0.6
--.TIR.Z. 1987-08-07T15:58:54.50 10.0 undecidable manual PN 346 4.2513 0.12 1.6
--.VAY.Z. 1987-08-07T15:58:53.00 10.0 undecidable manual PN 14 4.1958 -0.55 1.2
--.LCI.Z. 1987-08-07T15:58:50.11 10.0 undecidable manual PN 323 3.9738 -0.33 1.5
--.OHR.Z. 1987-08-07T15:58:49.00 10.0 undecidable manual PN 355 3.8961 -0.37 1.4
--.KBN.Z. 1987-08-07T15:58:42.50 10.0 undecidable manual PN 354 3.4077 -0.24 1.5
--.KZN.Z. 1987-08-07T15:58:38.60 10.0 undecidable manual PN 8 3.0858 0.26 1.5
--.SRN.Z. 1987-08-07T15:58:35.70 10.0 undecidable manual PN 340 2.8305 0.9 0.7
--.ATH.Z. 1987-08-07T15:58:25.00 10.0 undecidable manual PN 69 2.0424 1.01 0.6
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download