Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 3.1 on date 21-12-1988 and time 00:06:44 (Italy) in region Costa Greca Ionica (GRECIA)

A magnitude Md 3.1 earthquake occured in region: Costa Greca Ionica (GRECIA), on

  • 20-12-1988 23:06:44 (UTC)
  • 21-12-1988 00:06:44 (UTC +01:00) Italian time
  • 21-12-1988 01:06:44 (UTC +02:00) local time in the region of the earthquake (Europe/Athens)

and geographic coordinates (lat, lon) 37.7840, 20.9600 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 3.1
M 3.6 		1988-12-20
23:06:44		 37.784 20.96 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 83799
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1988-12-20 23:06:44 ± 0.29
Latitude 37.7840 ± 0.0291
Longitude 20.9600 ± 0.0261
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 83799

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) 3965.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 133
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
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) 0.00437
Epicentral distance of station farthest from the epicenter (degree) 0.04663
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 25
Magnitudes information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 83799
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:18:42

M:3.6

Field Value
Value 3.6
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 83799
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
--.SGO.Z. 1988-12-20T23:08:03.50 10.0 undecidable manual PN 303 5.1726 1.49 0.3
--.CDM.Z. 1988-12-20T23:07:58.00 10.0 undecidable manual PN? 313 4.884 0 0.5
--.MGR.Z. 1988-12-20T23:07:57.50 10.0 undecidable manual PN 300 4.8063 0.56 1
--.MEU.Z. 1988-12-20T23:07:56.81 10.0 positive manual PN 263 4.8951 -1.43 0.9
--.PZI.Z. 1988-12-20T23:07:55.99 10.0 positive manual PN 262 4.8174 -1.13 1.3
--.BCI.Z. 1988-12-20T23:07:54.00 10.0 undecidable manual PN 351 4.6176 -0.42 1.1
--.NPS.Z. 1988-12-20T23:07:52.70 10.0 undecidable manual PN 122 4.5066 -0.03 1.3
--.ATN.Z. 1988-12-20T23:07:50.85 10.0 undecidable manual PN 276 4.3401 0.33 1.2
--.CSI.Z. 1988-12-20T23:07:50.76 10.0 undecidable manual PN! 300 4.1403 2.95 0
--.SKO.Z. 1988-12-20T23:07:50.00 10.0 undecidable manual PN 4 4.1958 1.46 0.4
--.FE2.Z. 1988-12-20T23:07:47.24 10.0 undecidable manual PN! 275 3.8406 3.53 0
--.CZI.Z. 1988-12-20T23:07:47.12 10.0 undecidable manual PN 292 4.0293 0.84 0.9
--.GA2.Z. 1988-12-20T23:07:46.66 10.0 undecidable manual PN 276 4.0515 0.08 1.4
--.SOI.Z. 1988-12-20T23:07:44.18 10.0 positive manual PN 275 3.8739 0.1 2.8
--.TIR.Z. 1988-12-20T23:07:42.50 10.0 undecidable manual PN 346 3.6519 1.4 0.5
--.VAY.Z. 1988-12-20T23:07:41.50 10.0 undecidable manual PN 18 3.7407 -0.79 1.9
--.SE2.Z. 1988-12-20T23:07:40.74 10.0 undecidable manual PN 291 3.5298 1.32 0.5
--.RI2.Z. 1988-12-20T23:07:40.52 10.0 undecidable manual PN 281 3.5631 0.57 1.1
--.VAM.Z. 1988-12-20T23:07:39.30 10.0 undecidable manual PN 129 3.4077 1.63 0.3
--.LCI.Z. 1988-12-20T23:07:37.96 10.0 undecidable manual PN 319 3.3744 0.8 1
--.PLG.Z. 1988-12-20T23:07:35.00 10.0 undecidable manual PN 35 3.219 -0.17 1.4
--.OHR.Z. 1988-12-20T23:07:35.90 10.0 undecidable manual PN 357 3.33 -0.64 2.2
--.KZN.Z. 1988-12-20T23:07:26.70 10.0 undecidable manual PN 13 2.5863 0.17 1.4
--.ATH.Z. 1988-12-20T23:07:20.00 10.0 undecidable manual PN 83 2.1756 -0.83 0.9
--.VLS.Z. 1988-12-20T23:06:53.50 10.0 undecidable manual PG 323 0.4884 -1.48 0.4
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