Earthquake with magnitude of M 3.9 on date 21-02-1985 and time 11:21:53 (UTC) in region Confine Grecia Albania (GRECIA, ALBANIA)

A magnitude M 3.9 earthquake occured in region: Confine Grecia Albania (GRECIA, ALBANIA), on

  • 21-02-1985 11:21:53 (UTC)
  • 21-02-1985 12:21:53 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.46, 20.78 at 5 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 3.9 1985-02-21
11:21:53
40.46 20.78 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 2159
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-21 11:21:53 ± 0.402
Latitude 40.46 ± 0.03
Longitude 20.78 ± 0.04
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 2159

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) 4731.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.9
Epicentral distance of station closest to the epicenter (degree) 0.00146
Epicentral distance of station farthest from the epicenter (degree) 0.08168
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 22
Magnitude information

M:3.9

Field Value
Value 3.9
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 2159
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:50:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.PAG.Z. 1985-02-21T11:24:03.10 10.0 undecidable manual PN 312 0.0817 -1.92 0.2
--.PAN.Z. 1985-02-21T11:24:01.50 10.0 undecidable manual PN 312 0.0798 -0.74 0.5
--.CTI.Z. 1985-02-21T11:23:59.00 10.0 undecidable manual PN 313 0.0781 -0.6 0.6
--.TRI.Z. 1985-02-21T11:23:40.00 10.0 undecidable manual PN 318 0.066 -1.1 0.5
--.PO9.Z. 1985-02-21T11:23:27.50 10.0 undecidable manual PN 292 0.0561 1.49 0.4
--.SD1.Z. 1985-02-21T11:23:16.00 10.0 undecidable manual PN 285 0.0485 1.49 0.4
--.SGO.Z. 1985-02-21T11:22:56.00 10.0 undecidable manual PN 273 0.0374 -1.51 0.5
--.HCY.Z. 1985-02-21T11:22:37.00 10.0 undecidable manual PN 320 0.0236 0.54 1.1
--.BDV.Z. 1985-02-21T11:22:33.00 10.0 undecidable manual PN 321 0.021 0.42 1.1
--.TTG.Z. 1985-02-21T11:22:33.20 10.0 undecidable manual PN 330 0.0205 1.49 0.5
--.VLS.Z. 1985-02-21T11:22:32.60 10.0 undecidable manual PN 183 0.0205 0.83 0.9
--.LCI.Z. 1985-02-21T11:22:29.00 10.0 undecidable manual PN 267 0.0182 0.65 1
--.ULC.Z. 1985-02-21T11:22:28.00 10.0 undecidable manual PN 323 0.017 1.54 0.5
--.SDA.Z. 1985-02-21T11:22:28.00 10.0 undecidable manual PN 328 0.0164 2.4 0.1
--.SKO.Z. 1985-02-21T11:22:23.50 10.0 undecidable manual PN 17 0.0143 1.14 1.5
--.VAY.Z. 1985-02-21T11:22:23.30 10.0 undecidable manual PN 56 0.0144 0.79 1.9
--.TIR.Z. 1985-02-21T11:22:15.00 10.0 negative manual PN 322 0.0101 -0.93 1.8
--.VLO.Z. 1985-02-21T11:22:12.70 10.0 undecidable manual PG 271 0.0087 -0.64 2.1
--.SRN.Z. 1985-02-21T11:22:10.40 10.0 positive manual PG 226 0.0074 -0.18 2.4
--.KZN.Z. 1985-02-21T11:22:07.60 10.0 undecidable manual PG 100 0.0069 -1.95 0.3
--.OHR.Z. 1985-02-21T11:22:06.10 10.0 undecidable manual PG 1 0.0058 -1.32 1.3
--.KBN.Z. 1985-02-21T11:21:57.10 10.0 positive manual PG 0 0.0015 -0.39 2.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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