Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of M 4.0 on date 28-10-1988 and time 20:28:44 (Italy) in region Costa Greca Ionica (GRECIA)

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

  • 28-10-1988 19:28:44 (UTC)
  • 28-10-1988 20:28:44 (UTC +01:00) Italian time
  • 28-10-1988 21:28:44 (UTC +02:00) local time in the region of the earthquake (Europe/Athens)

and geographic coordinates (lat, lon) 38.0770, 20.4260 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 1988-10-28
19:28:44		 38.077 20.426 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 79979
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1988-10-28 19:28:44 ± 0.572
Latitude 38.0770 ± 0.0523
Longitude 20.4260 ± 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 79979

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) 6391.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 179
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
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) 0.00146
Epicentral distance of station farthest from the epicenter (degree) 0.04582
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 24
Magnitude information

M:4.0

Field Value
Value 4.0
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 79979
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. 1988-10-28T19:30:26.22 10.0 undecidable manual SN 272 3.8961 -1.8 0.1
--.GRI.Z. 1988-10-28T19:30:12.54 10.0 undecidable manual SN 284 3.219 0.7 0.4
--.BSS.Z. 1988-10-28T19:30:01.76 10.0 undecidable manual PN 303 5.0838 1.02 0.6
--.SGO.Z. 1988-10-28T19:29:56.46 10.0 undecidable manual PN 303 4.662 1.56 0.3
--.MGR.Z. 1988-10-28T19:29:50.43 10.0 undecidable manual PN 300 4.2957 0.58 1.1
--.BCI.Z. 1988-10-28T19:29:48.50 10.0 undecidable manual PN 356 4.2846 -1.26 0.5
--.SKO.Z. 1988-10-28T19:29:45.00 10.0 undecidable manual PN 11 3.9627 -0.27 1.3
--.ATN.Z. 1988-10-28T19:29:44.47 10.0 undecidable manual PN 272 3.8961 0.1 1.3
--.BRT.Z. 1988-10-28T19:29:43.00 10.0 undecidable manual PN 319 3.7629 0.47 1.2
--.CSI.Z. 1988-10-28T19:29:41.92 10.0 undecidable manual PN 299 3.6297 1.2 0.6
--.VAY.Z. 1988-10-28T19:29:40.60 10.0 undecidable manual PN 26 3.6297 -0.12 1.4
--.PHP.Z. 1988-10-28T19:29:40.40 10.0 undecidable manual PN 0 3.6075 0.07 1.4
--.TDS.Z. 1988-10-28T19:29:40.87 10.0 undecidable manual PN 297 3.552 1.3 0.5
--.CZI.Z. 1988-10-28T19:29:38.58 10.0 undecidable manual PN 290 3.5298 -0.79 1
--.TIR.Z. 1988-10-28T19:29:36.00 10.0 undecidable manual PN 352 3.2856 -0.05 1.5
--.PLG.Z. 1988-10-28T19:29:36.50 10.0 undecidable manual PN 44 3.2745 0.73 1.1
--.SOI.Z. 1988-10-28T19:29:36.50 10.0 undecidable manual PN 271 3.4299 -1.49 0.4
--.FE2.Z. 1988-10-28T19:29:35.88 10.0 undecidable manual PN 270 3.4077 -1.77 0.2
--.GRI.Z. 1988-10-28T19:29:34.83 10.0 undecidable manual PN 284 3.219 -0.2 1.4
--.OHR.Z. 1988-10-28T19:29:33.00 10.0 undecidable manual PN 5 3.0414 0.4 2.7
--.LCI.Z. 1988-10-28T19:29:31.00 10.0 undecidable manual PN 322 2.8749 0.66 1.1
--.ATH.Z. 1988-10-28T19:29:27.70 10.0 undecidable manual PN 91 2.5863 1.33 0.5
--.KZN.Z. 1988-10-28T19:29:24.50 10.0 undecidable manual PN 24 2.4531 -0.05 1.5
--.KBN.Z. 1988-10-28T19:29:24.60 10.0 undecidable manual PN 6 2.553 -1.33 0.5
--.SRN.Z. 1988-10-28T19:29:15.10 10.0 undecidable manual PN 349 1.8204 -0.84 1
--.VLS.Z. 1988-10-28T19:28:48.30 10.0 negative manual PG 52 0.1665 -0.57 2.4
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download