Earthquake with magnitude of M 4.0 on date 21-05-1990 and time 21:20:56 (UTC) in region Greece [Land]

A magnitude M 4.0 earthquake occured in region: Greece [Land], on

  • 21-05-1990 21:20:56 (UTC)
  • 21-05-1990 23:20:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 39.98, 20.91 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.

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
Rev 1000 M 4.0 1990-05-21
21:20:56
39.98 20.91 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 119319
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-05-21 21:20:56 ± 0.235
Latitude 39.98 ± 0.02
Longitude 20.91 ± 0.04
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 119319

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) 3836.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 67
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
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) 0.0102
Epicentral distance of station farthest from the epicenter (degree) 0.05067
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitude information

M:4

Field Value
Value 4
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 119319
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
--.SDI.Z. 1990-05-21T21:22:18.00 10.0 undecidable manual PN 290 0.0507 -1.66 0.2
--.SGO.Z. 1990-05-21T21:21:59.00 10.0 undecidable manual PN! 279 0.0388 -2.43 0
--.GRI.Z. 1990-05-21T21:21:53.00 10.0 undecidable manual PN 252 0.0329 0.58 1
--.VLI.Z. 1990-05-21T21:21:52.00 10.0 undecidable manual PN 153 0.0326 -0.08 1.3
--.VLS.Z. 1990-05-21T21:21:52.50 10.0 undecidable manual SN! 187 0.0163 2.63 0
--.TDS.Z. 1990-05-21T21:21:52.00 10.0 undecidable manual PN 266 0.0317 1.38 0.4
--.ORI.Z. 1990-05-21T21:21:50.00 10.0 undecidable manual PN 272 0.0307 0.8 0.9
--.CDT.Z. 1990-05-21T21:21:50.00 10.0 undecidable manual PN! 288 0.0332 -2.92 0
--.ATH.Z. 1990-05-21T21:21:42.00 10.0 undecidable manual PN 131 0.0266 -0.97 0.8
--.ITM.Z. 1990-05-21T21:21:42.00 10.0 undecidable manual PN 163 0.0261 -0.19 1.4
--.OHR.Z. 1990-05-21T21:21:33.70 10.0 undecidable manual SN 355 0.0102 -0.07 0.9
--.SKO.Z. 1990-05-21T21:21:30.80 10.0 undecidable manual PN 11 0.0183 0.56 2.4
--.NEO.Z. 1990-05-21T21:21:29.50 10.0 undecidable manual PN 109 0.0171 1.05 0.7
--.VAY.Z. 1990-05-21T21:21:28.00 10.0 undecidable manual PN 42 0.0165 0.4 2.7
--.VLS.Z. 1990-05-21T21:21:26.50 10.0 undecidable manual PN 187 0.0163 -0.7 1.1
--.OHR.Z. 1990-05-21T21:21:16.80 10.0 undecidable manual PN 355 0.0102 -1.12 1.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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