Earthquake with magnitude of Md 2.0 on date 31-05-1987 and time 08:11:56 (Italy) in region 5 km N Casteldelfino (CN)

A magnitude Md 2.0 earthquake occured in region: 5 km N Casteldelfino (CN), on

  • 31-05-1987 06:11:56 (UTC)
  • 31-05-1987 08:11:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.63, 7.09 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Casteldelfino CN 5 157 157
Pontechianale CN 5 179 336
Bellino CN 8 109 445
Crissolo CN 10 168 613
Oncino CN 10 76 689
Elva CN 10 97 786
Sampeyre CN 10 1022 1808
Ostana CN 11 83 1891
Stroppo CN 14 103 1994
Macra CN 16 59 2053
Paesana CN 16 2784 4837
Frassino CN 16 265 5102
Prazzo CN 17 170 5272
Celle di Macra CN 18 100 5372
Acceglio CN 19 162 5534
Sanfront CN 19 2395 7929
Marmora CN 19 68 7997
Canosio CN 19 80 8077
Bobbio Pellice TO 20 563 8640

Municipalities with at least 50000 inhabitants

An earthquake occurred to
45 Km NW of Cuneo (56081 inhabitants)
63 Km SW of Moncalieri (57294 inhabitants)
68 Km SW of Torino (890529 inhabitants)
93 Km W of Asti (76202 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 2.0 1987-05-31
06:11:56
44.63 7.09 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 48489
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-05-31 06:11:56 ± 0.149
Latitude 44.63 ± 0.01
Longitude 7.09 ± 0.03
Depth (km) 10 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 48489

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) 2413.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
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) 0.00113
Epicentral distance of station farthest from the epicenter (degree) 0.01149
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

Md:2

Field Value
Value 2
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 48489
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:47:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.LRG.Z. 1987-05-31T06:12:37.80 10.0 undecidable manual SN 204 0.0115 -0.03 0.6
--.FIN.Z. 1987-05-31T06:12:27.20 10.0 undecidable manual SG 117 0.0081 -0.65 0.4
--.IMI.Z. 1987-05-31T06:12:26.90 10.0 undecidable manual SG 140 0.0083 -1.47 0
--.LPG.Z. 1987-05-31T06:12:26.80 10.0 undecidable manual SG 344 0.008 -0.8 0.3
--.LSD.Z. 1987-05-31T06:12:25.00 10.0 undecidable manual SG 3 0.0074 -0.35 0.6
--.SBF.Z. 1987-05-31T06:12:23.40 10.0 undecidable manual SG 161 0.0072 -1.26 0.1
--.LRG.Z. 1987-05-31T06:12:21.10 10.0 undecidable manual PN 204 0.0115 0.58 0.9
--.IMI.Z. 1987-05-31T06:12:15.10 10.0 undecidable manual PG 140 0.0083 0.04 1.7
--.BNI.Z. 1987-05-31T06:12:14.00 10.0 undecidable manual SG 325 0.0045 -1.16 0.1
--.LSD.Z. 1987-05-31T06:12:14.50 10.0 undecidable manual PG 3 0.0074 1.19 0.2
--.FIN.Z. 1987-05-31T06:12:14.80 10.0 undecidable manual PG 117 0.0081 0.05 1.8
--.LPG.Z. 1987-05-31T06:12:14.50 10.0 undecidable manual PG 344 0.008 -0.11 1.7
--.SBF.Z. 1987-05-31T06:12:13.00 10.0 undecidable manual PG 161 0.0072 0.09 1.9
--.STV.Z. 1987-05-31T06:12:11.40 10.0 undecidable manual SG 155 0.0037 -0.75 0.4
--.RRL.Z. 1987-05-31T06:12:09.60 10.0 undecidable manual SG 323 0.0032 -0.72 0.4
--.BNI.Z. 1987-05-31T06:12:07.50 10.0 undecidable manual PG 325 0.0045 0.08 2.1
--.STV.Z. 1987-05-31T06:12:05.70 10.0 undecidable manual PG 155 0.0037 0.01 2.1
--.DOI.Z. 1987-05-31T06:12:05.00 10.0 undecidable manual SG 138 0.0015 0.74 0.4
--.RRL.Z. 1987-05-31T06:12:04.50 10.0 undecidable manual PG 323 0.0032 -0.13 2
--.PZZ.Z. 1987-05-31T06:12:03.10 10.0 undecidable manual SG 174 0.0011 0.25 0.8
--.DOI.Z. 1987-05-31T06:12:01.50 10.0 undecidable manual PG 138 0.0015 0.37 1.7
--.PZZ.Z. 1987-05-31T06:12:00.50 10.0 undecidable manual PG 174 0.0011 0.18 2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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