Earthquake with magnitude of Md 2.0 on date 28-02-1987 and time 11:49:23 (Italy) in region Confine Italia Francia (FRANCIA)

A magnitude Md 2.0 earthquake occured in region: Confine Italia Francia (FRANCIA), on

  • 28-02-1987 10:49:23 (UTC)
  • 28-02-1987 11:49:23 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 45.3, 6.62 at 10 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
87 Km W of Torino (890529 inhabitants)
90 Km W of Moncalieri (57294 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
Rev 1000 Md 2.0 1987-02-28
45.3 6.62 10 2013-07-15
Bollettino Sismico Italiano INGV 42199
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 1987-02-28 10:49:23 ± 0.462
Latitude 45.30 ± 0.02
Longitude 6.62 ± 0.04
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 42199


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) 3372.1
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 255
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00219
Epicentral distance of station farthest from the epicenter (degree) 0.00421
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information


Field Value
Value 2
Num. used stations 1
Type of magnitude Md
Reference to an origin 42199
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:41:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.RSP.Z. 1987-02-28T10:49:40.80 10.0 undecidable manual SG 107 0.0042 0.27 0.6
--.RRL.Z. 1987-02-28T10:49:37.50 10.0 undecidable manual SG 163 0.0035 -0.56 0.4
--.LSD.Z. 1987-02-28T10:49:37.70 10.0 undecidable manual SG 66 0.0036 -0.84 0.1
--.BNI.Z. 1987-02-28T10:49:33.00 10.0 undecidable manual SG 170 0.0022 -0.39 0.6
--.RSP.Z. 1987-02-28T10:49:33.90 10.0 undecidable manual PG 107 0.0042 0.55 0.9
--.LSD.Z. 1987-02-28T10:49:32.10 10.0 undecidable manual PG 66 0.0036 -0.1 2.1
--.RRL.Z. 1987-02-28T10:49:32.30 10.0 undecidable manual PG 163 0.0035 0.38 1.5
--.BNI.Z. 1987-02-28T10:49:29.00 10.0 undecidable manual PG 170 0.0022 -0.23 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download