ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of Md 2.6 on date 02-12-1985 and time 04:44:55 (Italy) in region Costa Calabra sud orientale (Reggio di Calabria)

A magnitude Md 2.6 earthquake occured in region: Costa Calabra sud orientale (Reggio di Calabria), on

  • 02-12-1985 03:44:55 (UTC)
  • 02-12-1985 04:44:55 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.8, 15.74 at 30 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Melito di Porto Salvo RC 14 11355 11355
Roghudi RC 14 1104 12459

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km S of Reggio di Calabria (183035 inhabitants)
47 Km SE of Messina (238439 inhabitants)
55 Km E of Acireale (52622 inhabitants)
67 Km NE of Catania (314555 inhabitants)
92 Km NE of Siracusa (122291 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 Md 2.6 1985-12-02
03:44:55
37.8 15.74 31 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 17229
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-12-02 03:44:55 ± 0.332
Latitude 37.80 ± 0.02
Longitude 15.74 ± 0.04
Depth (km) 31 ± 69 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 17229

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) 4486.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 208
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00275
Epicentral distance of station farthest from the epicenter (degree) 0.01295
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

Md:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 17229
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:20:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.GIB.Z. 1985-12-02T03:45:35.00 10.0 undecidable manual S 278 0.0122 0.32 0.5
--.PZI.Z. 1985-12-02T03:45:25.50 10.0 undecidable manual S 220 0.0087 0.1 0.7
--.CZI.Z. 1985-12-02T03:45:19.40 10.0 undecidable manual P 11 0.013 0.17 1.3
--.GIB.Z. 1985-12-02T03:45:18.50 10.0 undecidable manual P 278 0.0122 0.36 1.1
--.PZI.Z. 1985-12-02T03:45:12.50 10.0 undecidable manual P 220 0.0087 -0.28 1.5
--.DR2.Z. 1985-12-02T03:45:11.80 10.0 undecidable manual P 9 0.0077 0.71 0.8
--.MSI.Z. 1985-12-02T03:45:04.00 10.0 undecidable manual P 339 0.0038 -1.23 0.2
--.GA2.Z. 1985-12-02T03:45:04.20 10.0 undecidable manual P 10 0.0033 -0.27 1.6
--.RCI.Z. 1985-12-02T03:45:04.00 10.0 undecidable manual P 345 0.0028 0.33 1.5
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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