Earthquake with magnitude of Md 2.3 on date 18-04-1987 and time 04:28:15 (UTC) in region Costa Siciliana nord orientale (Messina)

A magnitude Md 2.3 earthquake occured in region: Costa Siciliana nord orientale (Messina), on

  • 18-04-1987 04:28:15 (UTC)
  • 18-04-1987 06:28:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.33, 15.4 at 119 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
Villafranca Tirrena ME 11 8584 8584
Spadafora ME 12 5021 13605
Venetico ME 13 3911 17516
Saponara ME 16 3988 21504
Valdina ME 16 1355 22859
Torregrotta ME 16 7431 30290
Roccavaldina ME 17 1133 31423
Rometta ME 18 6650 38073
Milazzo ME 18 31646 69719
CondrĂ² ME 18 493 70212
Pace del Mela ME 19 6239 76451
Monforte San Giorgio ME 19 2777 79228
San Pier Niceto ME 20 2837 82065
Gualtieri SicaminĂ² ME 20 1807 83872

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km NW of Messina (238439 inhabitants)
33 Km NW of Reggio di Calabria (183035 inhabitants)
83 Km N of Acireale (52622 inhabitants)
96 Km N of Catania (314555 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 1987-04-18
04:28:15
38.33 15.4 119 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 45139
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-04-18 04:28:15 ± 0.848
Latitude 38.33 ± 0.05
Longitude 15.40 ± 0.07
Depth (km) 119 ± 7 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 45139

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) 8486.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 199
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
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) 0.00162
Epicentral distance of station farthest from the epicenter (degree) 0.01627
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 45139
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:44:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.GR9.Z. 1987-04-18T04:28:52.50 10.0 undecidable manual S 58 0.0084 -0.55 0.6
--.SO9.Z. 1987-04-18T04:28:49.00 10.0 undecidable manual S 116 0.0052 1.25 0.1
--.MG9.Z. 1987-04-18T04:28:47.50 10.0 undecidable manual P 3 0.0163 0.51 0.7
--.ATN.Z. 1987-04-18T04:28:44.00 10.0 undecidable manual S 164 0.0016 -0.43 0.6
--.GR9.Z. 1987-04-18T04:28:37.00 10.0 undecidable manual P 58 0.0084 -0.26 1.5
--.SO9.Z. 1987-04-18T04:28:34.00 10.0 undecidable manual P 116 0.0052 -0.2 1.8
--.ATN.Z. 1987-04-18T04:28:32.00 10.0 undecidable manual P 164 0.0016 -0.29 1.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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