Earthquake with magnitude of Md 2.3 on date 04-04-1987 and time 07:32:17 (UTC) in region Tirreno Meridionale (MARE)

A magnitude Md 2.3 earthquake occured in region: Tirreno Meridionale (MARE), on

  • 04-04-1987 07:32:17 (UTC)
  • 04-04-1987 09:32:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.67, 15.44 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

An earthquake occurred to
54 Km N of Messina (238439 inhabitants)
65 Km N of Reggio di Calabria (183035 inhabitants)
83 Km W of Lamezia Terme (70714 inhabitants)
99 Km SW of Cosenza (67546 inhabitants)
Recent and historical seismicity
Seismic hazard
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Md 2.3 1987-04-04
38.68 15.44 5 2013-07-15
Bollettino Sismico Italiano INGV 44169
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 1987-04-04 07:32:17 ± 0.598
Latitude 38.68 ± 0.03
Longitude 15.44 ± 0.05
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 44169


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) 5415.3
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 216
Number of associated phases, regardless of their use for origin computation 5
Number of defining phases 5
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00461
Epicentral distance of station farthest from the epicenter (degree) 0.01077
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information


Field Value
Value 2.3
Num. used stations 2
Type of magnitude Md
Reference to an origin 44169
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:43:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.GR9.Z. 1987-04-04T07:32:46.00 10.0 undecidable manual SG 79 0.007 0.54 0.9
--.TS9.Z. 1987-04-04T07:32:41.28 10.0 undecidable manual PN 34 0.0108 0.51 1.2
--.ATN.Z. 1987-04-04T07:32:38.00 10.0 undecidable manual SG 178 0.0046 1.14 0.2
--.GR9.Z. 1987-04-04T07:32:32.80 10.0 undecidable manual PG 79 0.007 -0.79 1.1
--.ATN.Z. 1987-04-04T07:32:28.10 10.0 undecidable manual PG 178 0.0046 -0.53 1.6
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download