Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.5 on date 06-09-1987 and time 07:02:48 (Italy) in region Confine Italia Francia (FRANCIA)

A magnitude Md 2.5 earthquake occured in region: Confine Italia Francia (FRANCIA), on

  • 06-09-1987 05:02:48 (UTC)
  • 06-09-1987 07:02:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.5370, 6.8540 at 15 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Acceglio CN 13 162 162
Bellino CN 14 109 271
Pontechianale CN 17 179 450
Prazzo CN 17 170 620
Casteldelfino CN 18 157 777
Elva CN 19 97 874
Argentera CN 20 83 957

Municipalities with at least 50000 inhabitants

An earthquake occurred to
58 Km W of Cuneo (56081 inhabitants)
84 Km SW of Moncalieri (57294 inhabitants)
89 Km SW of Torino (890529 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 2.5 1987-09-06
05:02:48		 44.537 6.854 15 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 54839
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-09-06 05:02:48 ± 0.174
Latitude 44.5370 ± 0.0086
Longitude 6.8540 ± 0.0212
Depth (km) 15 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 54839

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) 1929.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 148
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
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) 0.00154
Epicentral distance of station farthest from the epicenter (degree) 0.01101
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 54839
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:52:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.LMR.Z. 1987-09-06T05:03:27.50 10.0 undecidable manual SN 191 1.221 0.65 0.2
--.LRG.Z. 1987-09-06T05:03:24.60 10.0 undecidable manual SN 198 1.1322 -0.13 0.6
--.IMI.Z. 1987-09-06T05:03:20.30 10.0 undecidable manual SN 129 0.9657 -0.48 0.4
--.LSD.Z. 1987-09-06T05:03:20.50 10.0 undecidable manual SN 13 0.9435 0.38 0.5
--.FRF.Z. 1987-09-06T05:03:20.20 10.0 undecidable manual SN 188 0.9768 -0.93 0.1
--.LPG.Z. 1987-09-06T05:03:19.90 10.0 undecidable manual SN 355 0.9657 -0.66 0.3
--.LPL.Z. 1987-09-06T05:03:19.80 10.0 undecidable manual SN 355 0.9768 -1.23 0
--.SBF.Z. 1987-09-06T05:03:15.00 10.0 undecidable manual SG 148 0.7881 -0.6 0.3
--.ROB.Z. 1987-09-06T05:03:14.60 10.0 undecidable manual SG 107 0.7548 -0.1 0.7
--.RSP.Z. 1987-09-06T05:03:11.80 10.0 undecidable manual SG 24 0.6771 -0.14 0.7
--.LMR.Z. 1987-09-06T05:03:10.80 10.0 undecidable manual PN 191 1.221 0.27 1.2
--.LRG.Z. 1987-09-06T05:03:09.40 10.0 undecidable manual PN 198 1.1322 0.1 1.4
--.LPL.Z. 1987-09-06T05:03:07.30 10.0 undecidable manual PN 355 0.9768 0.14 1.5
--.IMI.Z. 1987-09-06T05:03:07.50 10.0 undecidable manual PN 129 0.9657 0.48 1
--.LPG.Z. 1987-09-06T05:03:07.00 10.0 undecidable manual PN 355 0.9657 0.11 1.5
--.FRF.Z. 1987-09-06T05:03:07.00 10.0 undecidable manual PN 188 0.9768 -0.22 1.4
--.LSD.Z. 1987-09-06T05:03:06.90 10.0 undecidable manual PN 13 0.9435 0.26 1.4
--.BNI.Z. 1987-09-06T05:03:05.39 10.0 undecidable manual SG 346 0.5217 -1.84 0
--.SBF.Z. 1987-09-06T05:03:03.80 10.0 undecidable manual PG 148 0.7881 -0.23 1.6
--.STV.Z. 1987-09-06T05:03:03.50 10.0 undecidable manual SG 130 0.444 -0.99 0.1
--.ROB.Z. 1987-09-06T05:03:03.80 10.0 undecidable manual PG 107 0.7548 0.29 1.5
--.RRL.Z. 1987-09-06T05:03:02.70 10.0 undecidable manual SG 352 0.3774 0.01 0.7
--.RSP.Z. 1987-09-06T05:03:02.40 10.0 undecidable manual PG 24 0.6771 0.48 1.1
--.BNI.Z. 1987-09-06T05:02:59.30 10.0 positive manual PG 346 0.5217 0.1 3.5
--.STV.Z. 1987-09-06T05:02:57.60 10.0 undecidable manual PG 130 0.444 -0.02 1.8
--.RRL.Z. 1987-09-06T05:02:56.70 10.0 undecidable manual PG 352 0.3774 0.12 1.7
--.DOI.Z. 1987-09-06T05:02:55.00 10.0 positive manual PG 96 0.2775 0.33 2.8
--.PZZ.Z. 1987-09-06T05:02:55.30 10.0 undecidable manual SG 100 0.1665 -1.07 0.1
--.PZZ.Z. 1987-09-06T05:02:53.40 10.0 undecidable manual PG 100 0.1665 0.47 1.1
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download