Earthquake with magnitude of Md 2.3 on date 04-02-1987 and time 01:15:02 (UTC) in region 6 km N Adrano (CT)

A magnitude Md 2.3 earthquake occured in region: 6 km N Adrano (CT), on

  • 04-02-1987 01:15:02 (UTC)
  • 04-02-1987 02:15:02 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.72, 14.83 at 0 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
Adrano CT 6 36122 36122
Bronte CT 8 19172 55294
Biancavilla CT 9 24007 79301
Santa Maria di Licodia CT 12 7641 86942
Maletto CT 13 3920 90862
Centuripe EN 13 5470 96332
Ragalna CT 14 3924 100256
Maniace CT 16 3765 104021
PaternĂ² CT 17 48228 152249
CesarĂ² ME 17 2439 154688
Regalbuto EN 18 7277 161965
San Teodoro ME 18 1403 163368
Belpasso CT 19 28108 191476

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km W of Acireale (52622 inhabitants)
33 Km NW of Catania (314555 inhabitants)
72 Km E of Caltanissetta (63360 inhabitants)
83 Km SW of Messina (238439 inhabitants)
84 Km SW of Reggio di Calabria (183035 inhabitants)
84 Km NW of Siracusa (122291 inhabitants)
88 Km N of Ragusa (73313 inhabitants)
89 Km NE of Gela (75827 inhabitants)
89 Km N of Vittoria (63339 inhabitants)
96 Km N of Modica (54633 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 2.3 1987-02-04
01:15:02
37.72 14.83 0 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 40459
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-02-04 01:15:02 ± 0.73
Latitude 37.72 ± 0.02
Longitude 14.83 ± 0.05
Depth (km) 0 ± 8 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 40459

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) 4565.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 161
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
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) 0.0021
Epicentral distance of station farthest from the epicenter (degree) 0.00923
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 40459
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:40:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SO9.Z. 1987-02-04T01:15:40.00 10.0 undecidable manual SG 69 0.0092 0.58 0.4
--.AT9.Z. 1987-02-04T01:15:28.50 10.0 undecidable manual SG 48 0.006 0.77 0.3
--.ML9.Z. 1987-02-04T01:15:26.50 10.0 undecidable manual SG 172 0.0055 0.53 0.6
--.SO9.Z. 1987-02-04T01:15:23.00 10.0 undecidable manual PG 69 0.0092 -0.83 0.3
--.AT9.Z. 1987-02-04T01:15:16.50 10.0 undecidable manual PG 48 0.006 -0.58 0.9
--.ML9.Z. 1987-02-04T01:15:15.80 10.0 undecidable manual PG 172 0.0055 -0.26 1.5
--.MS9.Z. 1987-02-04T01:15:11.50 10.0 undecidable manual SG 333 0.0021 -0.15 1
--.MS9.Z. 1987-02-04T01:15:08.00 10.0 positive manual PG 333 0.0021 0.2 3.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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