Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of M 4.0 on date 22-02-1987 and time 10:22:05 (UTC) in region Costa Greca Ionica (GRECIA)

A magnitude M 4.0 earthquake occured in region: Costa Greca Ionica (GRECIA), on

  • 22-02-1987 10:22:05 (UTC)
  • 22-02-1987 11:22:05 (UTC +01:00) Italian time
  • 22-02-1987 12:22:05 (UTC +02:00) local time in the region of the earthquake (Europe/Athens)

and geographic coordinates (lat, lon) 38.1570, 20.7130 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 4.0 1987-02-22
10:22:05		 38.157 20.713 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 41819
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-02-22 10:22:05 ± 0.456
Latitude 38.1570 ± 0.0409
Longitude 20.7130 ± 0.0274
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 41819

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) 5142.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 188
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 27
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) 0.00089
Epicentral distance of station farthest from the epicenter (degree) 0.09317
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 25
Magnitude information

M:4.0

Field Value
Value 4.0
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 41819
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:30:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.FO1.Z. 1987-02-22T10:24:34.00 10.0 undecidable manual PN 327 10.2564 1.42 0.2
--.CTI.Z. 1987-02-22T10:24:32.00 10.0 undecidable manual PN 322 10.3452 -1.87 0.1
--.IVA.Z. 1987-02-22T10:24:10.00 10.0 undecidable manual SN 352 4.7397 0.9 0.3
--.TTG.Z. 1987-02-22T10:24:01.00 10.0 undecidable manual SN 345 4.4067 0.02 0.5
--.ARV.Z. 1987-02-22T10:24:00.00 10.0 undecidable manual PN 314 7.9254 -0.64 0.8
--.SD1.Z. 1987-02-22T10:23:39.00 10.0 undecidable manual PN 306 6.3603 -0.12 1.1
--.PVL.Z. 1987-02-22T10:23:36.00 10.0 undecidable manual PN 32 6.0162 1.62 0.2
--.DUI.Z. 1987-02-22T10:23:34.50 10.0 undecidable manual PN 308 5.9274 1.34 0.4
--.MSC.Z. 1987-02-22T10:23:34.20 10.0 positive manual PN 302 5.994 0.06 2.4
--.SGG.Z. 1987-02-22T10:23:32.40 10.0 undecidable manual PN 305 5.8275 0.57 1
--.SOR.Z. 1987-02-22T10:23:26.70 10.0 undecidable manual PN 298 5.4834 -0.35 1.2
--.TR9.Z. 1987-02-22T10:23:22.40 10.0 undecidable manual PN 306 5.106 0.51 1.1
--.KDZ.Z. 1987-02-22T10:23:20.00 10.0 undecidable manual PN 43 4.9728 0.01 2.6
--.SGO.Z. 1987-02-22T10:23:19.00 10.0 undecidable manual PN 301 4.8063 1.19 0.5
--.IVA.Z. 1987-02-22T10:23:16.00 10.0 undecidable manual PN 352 4.7397 -0.91 0.8
--.MG9.Z. 1987-02-22T10:23:13.00 10.0 undecidable manual PN 297 4.4511 0.09 1.3
--.TTG.Z. 1987-02-22T10:23:11.00 10.0 undecidable manual PN 345 4.4067 -1.23 0.5
--.ULC.Z. 1987-02-22T10:23:06.00 10.0 undecidable manual PN 343 3.9516 -0.11 1.3
--.ORI.Z. 1987-02-22T10:23:04.00 10.0 undecidable manual PN 301 3.8073 -0.03 1.3
--.SKO.Z. 1987-02-22T10:23:04.00 10.0 undecidable manual PN 7 3.8406 -0.57 2.2
--.BRT.Z. 1987-02-22T10:23:03.70 10.0 undecidable manual PN 315 3.8517 -1.01 0.7
--.GR9.Z. 1987-02-22T10:23:00.00 10.0 undecidable manual PN 282 3.4077 1.45 0.4
--.VAY.Z. 1987-02-22T10:22:58.00 10.0 undecidable manual PN 23 3.4632 -1.3 0.5
--.LCI.Z. 1987-02-22T10:22:53.50 10.0 undecidable manual PN 317 2.9526 1.13 0.6
--.OHR.Z. 1987-02-22T10:22:52.50 10.0 positive manual PN 1 2.9526 0.29 2.5
--.ATH.Z. 1987-02-22T10:22:44.50 10.0 undecidable manual PN 93 2.3643 0.29 1.3
--.VLS.Z. 1987-02-22T10:22:07.50 10.0 positive manual PG 281 0.0999 -1.1 1.2
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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