Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 4.0 on date 16-09-1987 and time 03:18:13 (Italy) in region Costa Occidentale Peloponneso (GRECIA)

A magnitude Md 4.0 earthquake occured in region: Costa Occidentale Peloponneso (GRECIA), on

  • 16-09-1987 01:18:13 (UTC)
  • 16-09-1987 03:18:13 (UTC +02:00) Italian time
  • 16-09-1987 04:18:13 (UTC +03:00) local time in the region of the earthquake (Europe/Athens)

and geographic coordinates (lat, lon) 36.77, 21.61 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 4.0
M 4.2 		1987-09-16
01:18:13		 36.77 21.61 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 55349
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-09-16 01:18:13 ± 0.348
Latitude 36.77 ± 0.03
Longitude 21.61 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 55349

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) 3498.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 161
Number of associated phases, regardless of their use for origin computation 104
Number of defining phases 104
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) 0.01457
Epicentral distance of station farthest from the epicenter (degree) 0.12174
Number of stations at which the event was observed 79
Number of stations from which data was used for origin computation 79
Magnitudes information

Md:4

Field Value
Value 4
Uncertainty
Num. used stations 6
Type of magnitude Md
Reference to an origin 55349
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:53:16

M:4.2

Field Value
Value 4.2
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 55349
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
--.MEU.Z. 1987-09-16T01:24:40.00 10.0 undecidable manual U
--.GRI.Z. 1987-09-16T01:23:04.50 10.0 undecidable manual U
--.ATN.Z. 1987-09-16T01:23:33.00 10.0 undecidable manual U
--.SOI.Z. 1987-09-16T01:22:50.50 10.0 undecidable manual U
--.CTI.Z. 1987-09-16T01:23:06.46 10.0 undecidable manual SN 323 0.107 -0.55 0.4
--.TRI.E. 1987-09-16T01:22:38.50 10.0 undecidable manual SN 328 0.0962 -0.04 0.4
--.VBY.Z. 1987-09-16T01:22:22.50 10.0 undecidable manual SN 332 0.0895 1.77 0.1
--.ORO.Z. 1987-09-16T01:21:24.50 10.0 undecidable manual PN 314 0.1217 -0.96 0.6
--.SAR.Z. 1987-09-16T01:21:24.00 10.0 undecidable manual SN 341 0.0674 1.5 0.2
--.DOI.Z. 1987-09-16T01:21:23.50 10.0 undecidable manual PN 309 0.12 0.59 0.7
--.VAI.Z. 1987-09-16T01:21:21.12 10.0 undecidable manual PN 317 0.1191 -0.32 0.9
--.MDI.Z. 1987-09-16T01:21:13.00 10.0 undecidable manual PN 318 0.1141 -0.73 0.7
--.BOB.Z. 1987-09-16T01:21:07.50 10.0 undecidable manual PN 314 0.1096 0.54 0.8
--.SOR.Z. 1987-09-16T01:21:06.40 10.0 undecidable manual SN 305 0.0614 -0.24 0.5
--.CTI.Z. 1987-09-16T01:21:01.61 10.0 undecidable manual PN 323 0.107 -1.44 0.3
--.FVI.Z. 1987-09-16T01:21:01.50 10.0 undecidable manual PN 328 0.1063 -0.47 0.9
--.BRY.Z. 1987-09-16T01:21:01.50 10.0 undecidable manual SN 339 0.059 1.31 0.3
--.NKY.Z. 1987-09-16T01:20:57.00 10.0 undecidable manual SN 341 0.0572 1.55 0.1
--.RBL.Z. 1987-09-16T01:20:55.00 10.0 undecidable manual PN 330 0.1023 -0.9 0.7
--.PII.Z. 1987-09-16T01:20:50.50 10.0 undecidable manual PN 312 0.0984 0.62 0.8
--.HCY.Z. 1987-09-16T01:20:50.50 10.0 undecidable manual SN 337 0.0554 -0.08 0.5
--.TTG.Z. 1987-09-16T01:20:47.00 10.0 undecidable manual SN 342 0.0534 1.65 0.1
--.VOY.Z. 1987-09-16T01:20:47.80 10.0 undecidable manual PN 329 0.0982 -1.71 0.2
--.TRI.Z. 1987-09-16T01:20:45.50 10.0 undecidable manual PN 328 0.0962 -1.11 0.6
--.LJU.Z. 1987-09-16T01:20:44.50 10.0 undecidable manual PN 331 0.0961 -1.8 0.2
--.BDV.Z. 1987-09-16T01:20:43.50 10.0 undecidable manual SN 339 0.0532 -1.23 0.2
--.PGD.Z. 1987-09-16T01:20:42.50 10.0 undecidable manual PN 315 0.0931 0.71 0.8
--.CEY.Z. 1987-09-16T01:20:41.70 10.0 undecidable manual PN 330 0.0941 -1.61 0.3
--.CRE.Z. 1987-09-16T01:20:38.50 10.0 undecidable manual PN 315 0.0905 0.71 0.8
--.ULC.Z. 1987-09-16T01:20:36.00 10.0 undecidable manual SN 340 0.0495 1.05 0.3
--.ZAG.Z. 1987-09-16T01:20:35.20 10.0 undecidable manual PN 336 0.0899 -1.6 0.3
--.VBY.Z. 1987-09-16T01:20:35.20 10.0 undecidable manual PN 332 0.0895 -1.12 0.6
--.BRT.Z. 1987-09-16T01:20:32.34 10.0 undecidable manual SN 320 0.0483 0.41 0.5
--.PZI.Z. 1987-09-16T01:20:31.40 10.0 undecidable manual SN 274 0.0479 0.14 0.5
--.MEU.Z. 1987-09-16T01:20:31.98 10.0 undecidable manual SN 275 0.0488 -1.16 0.3
--.ASS.Z. 1987-09-16T01:20:30.00 10.0 undecidable manual PN 314 0.0837 2.5 0
--.ARV.Z. 1987-09-16T01:20:29.31 10.0 undecidable manual PN 317 0.0848 0.07 1.2
--.ORI.Z. 1987-09-16T01:20:28.73 10.0 undecidable manual SN 310 0.0468 0.79 0.3
--.CM8.Z. 1987-09-16T01:20:26.20 10.0 undecidable manual PN 316 0.0821 1.08 0.6
--.AM8.Z. 1987-09-16T01:20:25.80 10.0 undecidable manual PN 319 0.0821 0.09 1.2
--.ATN.Z. 1987-09-16T01:20:24.50 10.0 undecidable manual SN 287 0.0456 -0.17 0.5
--.MNS.Z. 1987-09-16T01:20:22.37 10.0 undecidable manual PN 311 0.0798 0.83 0.8
--.ALP.Z. 1987-09-16T01:20:19.35 10.0 undecidable manual PN 316 0.0775 1.37 0.4
--.AQU.Z. 1987-09-16T01:20:16.50 10.0 undecidable manual PN 313 0.0758 1.03 0.6
--.RMP.Z. 1987-09-16T01:20:16.50 10.0 undecidable manual PN 308 0.0767 -0.36 1.2
--.CP9.Z. 1987-09-16T01:20:15.00 10.0 undecidable manual PN 309 0.0756 -0.12 1.2
--.SOI.Z. 1987-09-16T01:20:13.73 10.0 undecidable manual SN 287 0.0413 0.29 0.5
--.GRI.Z. 1987-09-16T01:20:12.50 10.0 undecidable manual SN 297 0.0412 -0.6 0.5
--.LCI.Z. 1987-09-16T01:20:11.50 10.0 undecidable manual SN 322 0.0404 0.61 0.4
--.SDI.Z. 1987-09-16T01:20:06.71 10.0 undecidable manual PN 311 0.0701 -0.04 1.3
--.SAR.Z. 1987-09-16T01:20:02.00 10.0 positive manual PN 341 0.0674 -0.7 2
--.DUI.Z. 1987-09-16T01:20:01.50 10.0 undecidable manual PN 313 0.0664 0.42 1.2
--.HVA.Z. 1987-09-16T01:20:01.40 10.0 negative manual PN 329 0.0677 -1.63 0.6
--.MSC.Z. 1987-09-16T01:20:01.20 10.0 negative manual PN 308 0.0665 -0.07 2.7
--.SGG.Z. 1987-09-16T01:20:00.00 10.0 undecidable manual PN 311 0.0653 0.58 1.1
--.FG2.Z. 1987-09-16T01:19:56.83 10.0 undecidable manual PN 316 0.0637 -0.15 1.4
--.OVO.Z. 1987-09-16T01:19:55.00 10.0 undecidable manual PN 307 0.0622 0.19 1.3
--.PLE.Z. 1987-09-16T01:19:52.40 10.0 undecidable manual PN 345 0.0609 -0.29 1.3
--.SOR.Z. 1987-09-16T01:19:51.80 10.0 undecidable manual PN 305 0.0614 -1.75 0.3
--.BSS.Z. 1987-09-16T01:19:51.35 10.0 undecidable manual PN 308 0.0596 0.61 1
--.MS1.Z. 1987-09-16T01:19:51.00 10.0 undecidable manual PN 319 0.0593 0.67 1
--.TR9.Z. 1987-09-16T01:19:50.40 10.0 negative manual PN 312 0.0588 0.79 1.8
--.BRY.Z. 1987-09-16T01:19:48.50 10.0 undecidable manual PN 339 0.059 -1.33 1
--.FG4.Z. 1987-09-16T01:19:48.54 10.0 undecidable manual PN 313 0.0579 0.47 1.2
--.FAI.Z. 1987-09-16T01:19:47.50 10.0 undecidable manual PN 276 0.0571 0.55 1.1
--.NKY.Z. 1987-09-16T01:19:46.40 10.0 undecidable manual PN 341 0.0572 -0.69 2.1
--.IVA.Z. 1987-09-16T01:19:46.00 10.0 undecidable manual PN 347 0.0561 0.63 1.1
--.SGO.Z. 1987-09-16T01:19:45.87 10.0 undecidable manual PN 308 0.0558 0.95 0.8
--.CDM.Z. 1987-09-16T01:19:42.00 10.0 undecidable manual PN 317 0.0537 0.2 1.3
--.PVY.Z. 1987-09-16T01:19:42.00 10.0 undecidable manual PN 347 0.0536 0.5 2.3
--.HCY.Z. 1987-09-16T01:19:42.50 10.0 undecidable manual PN 337 0.0554 -1.78 0.5
--.TTG.Z. 1987-09-16T01:19:40.50 10.0 positive manual PN 342 0.0534 -0.75 2
--.BDV.Z. 1987-09-16T01:19:39.80 10.0 positive manual PN 339 0.0532 -1.1 1.4
--.MGR.Z. 1987-09-16T01:19:39.56 10.0 undecidable manual PN 306 0.0523 0.05 1.4
--.BCI.Z. 1987-09-16T01:19:39.10 10.0 positive manual PN 347 0.0514 0.87 1.7
--.BAI.Z. 1987-09-16T01:19:38.00 10.0 undecidable manual PN 320 0.0511 0.25 1.3
--.MNO.Z. 1987-09-16T01:19:37.20 10.0 undecidable manual PN 283 0.0505 0.4 1.2
--.MMN.Z. 1987-09-16T01:19:35.20 10.0 undecidable manual PN 306 0.0485 1.39 0.4
--.SDA.Z. 1987-09-16T01:19:35.00 10.0 positive manual PN 342 0.0494 -0.11 2.7
--.ULC.Z. 1987-09-16T01:19:34.20 10.0 positive manual PN 340 0.0495 -1.05 1.5
--.BRT.Z. 1987-09-16T01:19:33.27 10.0 positive manual PN 320 0.0483 -0.24 2.7
--.MEU.Z. 1987-09-16T01:19:32.55 10.0 undecidable manual PN 275 0.0488 -1.66 0.3
--.SKO.Z. 1987-09-16T01:19:31.00 10.0 positive manual PN 357 0.0468 -0.14 2.7
--.ORI.Z. 1987-09-16T01:19:31.50 10.0 undecidable manual PN 310 0.0468 0.29 1.3
--.CSI.Z. 1987-09-16T01:19:31.00 10.0 undecidable manual PN 306 0.0462 0.65 1
--.PZI.Z. 1987-09-16T01:19:31.50 10.0 undecidable manual PN 274 0.0479 -1.41 0.5
--.PE1.Z. 1987-09-16T01:19:31.00 10.0 undecidable manual PN 321 0.0466 0.08 1.3
--.ATN.Z. 1987-09-16T01:19:29.54 10.0 undecidable manual PN 287 0.0456 0.22 1.3
--.TDS.Z. 1987-09-16T01:19:28.85 10.0 undecidable manual PN 305 0.0454 -0.17 1.4
--.MSI.Z. 1987-09-16T01:19:28.65 10.0 undecidable manual PN 287 0.045 0.15 1.3
--.ROI.Z. 1987-09-16T01:19:26.20 10.0 undecidable manual PN 306 0.0436 -0.13 1.4
--.TIR.Z. 1987-09-16T01:19:25.50 10.0 positive manual PN 343 0.0429 0.27 2.6
--.VAY.Z. 1987-09-16T01:19:23.30 10.0 undecidable manual PN 8 0.0414 0.27 2.6
--.PRK.Z. 1987-09-16T01:19:22.00 10.0 undecidable manual PN 53 0.0398 1.45 0.4
--.SOI.Z. 1987-09-16T01:19:22.70 10.0 undecidable manual PN 287 0.0413 -0.13 1.4
--.GRI.Z. 1987-09-16T01:19:22.39 10.0 positive manual PN 297 0.0412 -0.25 2.7
--.LCI.Z. 1987-09-16T01:19:21.29 10.0 undecidable manual PN 322 0.0404 -0.07 1.4
--.KZN.Z. 1987-09-16T01:19:10.00 10.0 undecidable manual PN 1 0.0318 1.7 0.2
--.NPS.Z. 1987-09-16T01:19:10.00 10.0 undecidable manual PN 113 0.0321 1.23 0.6
--.SRN.Z. 1987-09-16T01:19:07.20 10.0 positive manual PN 337 0.0301 1.41 0.8
--.ATH.Z. 1987-09-16T01:18:47.70 10.0 negative manual PN 53 0.0185 -0.35 2.5
--.VLS.Z. 1987-09-16T01:18:42.50 10.0 positive manual PN 329 0.0146 0.49 2.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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