Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.0 on date 19-12-1987 and time 23:42:59 (Italy) in region Confine Italia Francia (FRANCIA)

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

  • 19-12-1987 22:42:59 (UTC)
  • 19-12-1987 23:42:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.3350, 6.7610 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Argentera CN 17 83 83

Municipalities with at least 50000 inhabitants

An earthquake occurred to
63 Km W of Cuneo (56081 inhabitants)
100 Km NW of Sanremo (54807 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
Bulletin
Rev1000 		Md 2.0 1987-12-19
22:42:59		 44.335 6.761 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 59819
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-12-19 22:42:59 ± 0.214
Latitude 44.3350 ± 0.0104
Longitude 6.7610 ± 0.0180
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 59819

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) 1836.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 160
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00259
Epicentral distance of station farthest from the epicenter (degree) 0.01060
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

Md:2.0

Field Value
Value 2.0
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 59819
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:57:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.LPG.Z. 1987-12-19T22:43:35.29 10.0 undecidable manual SN 359 1.1544 -1.88 0
--.FIN.Z. 1987-12-19T22:43:33.00 10.0 undecidable manual SN 96 1.0434 -1.36 0.1
--.LMR.Z. 1987-12-19T22:43:32.90 10.0 undecidable manual SG 190 1.0101 -0.72 0.4
--.LRG.Z. 1987-12-19T22:43:31.50 10.0 undecidable manual SG 198 0.9213 0.8 0.4
--.IMP.Z. 1987-12-19T22:43:30.30 10.0 undecidable manual SG 117 0.9102 -0.01 0.8
--.ROB.Z. 1987-12-19T22:43:26.30 10.0 undecidable manual SG 92 0.7881 -0.23 0.8
--.FRF.Z. 1987-12-19T22:43:24.60 10.0 undecidable manual SG 186 0.777 -1.36 0.1
--.SBF.Z. 1987-12-19T22:43:22.40 10.0 undecidable manual SG 134 0.6771 -0.27 0.8
--.LPL.Z. 1987-12-19T22:43:21.60 10.0 undecidable manual PN 359 1.1766 0.29 1.5
--.LPG.Z. 1987-12-19T22:43:21.60 10.0 undecidable manual PN 359 1.1544 0.55 1.2
--.LMR.Z. 1987-12-19T22:43:18.80 10.0 undecidable manual PG 190 1.0101 -0.21 1.7
--.LRG.Z. 1987-12-19T22:43:18.50 10.0 undecidable manual PG 198 0.9213 1.18 0.4
--.FIN.Z. 1987-12-19T22:43:18.60 10.0 undecidable manual PN 96 1.0434 -0.84 0.8
--.RRL.Z. 1987-12-19T22:43:18.80 10.0 undecidable manual SG 1 0.5883 -0.95 0.3
--.IMP.Z. 1987-12-19T22:43:17.20 10.0 undecidable manual PG 117 0.9102 0.11 1.9
--.ROB.Z. 1987-12-19T22:43:15.20 10.0 undecidable manual PG 92 0.7881 0.29 1.9
--.FRF.Z. 1987-12-19T22:43:14.00 10.0 undecidable manual PG 186 0.777 -0.59 1.4
--.DOI.Z. 1987-12-19T22:43:13.50 10.0 undecidable manual SG 64 0.3774 0.18 0.8
--.SBF.Z. 1987-12-19T22:43:13.10 10.0 undecidable manual PG 134 0.6771 0.41 1.7
--.STV.Z. 1987-12-19T22:43:13.90 10.0 undecidable manual SG 101 0.4107 -0.41 0.7
--.SOO.Z. 1987-12-19T22:43:10.70 10.0 undecidable manual SG 55 0.2886 0.21 0.8
--.RRL.Z. 1987-12-19T22:43:10.70 10.0 undecidable manual PG 1 0.5883 -0.3 1.9
--.STV.Z. 1987-12-19T22:43:08.10 10.0 undecidable manual PG 101 0.4107 0.23 2
--.DOI.Z. 1987-12-19T22:43:07.80 10.0 undecidable manual PG 64 0.3774 0.51 1.6
--.SOO.Z. 1987-12-19T22:43:06.40 10.0 undecidable manual PG 55 0.2886 0.74 1.1
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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