Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.0 on date 29-05-1987 and time 23:17:51 (UTC) in region 4 km E Pontechianale (CN)

A magnitude Md 2.0 earthquake occured in region: 4 km E Pontechianale (CN), on

  • 29-05-1987 23:17:51 (UTC)
  • 30-05-1987 01:17:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.6370, 7.0820 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
Pontechianale CN 4 179 179
Casteldelfino CN 5 157 336
Bellino CN 8 109 445
Crissolo CN 9 168 613
Oncino CN 10 76 689
Sampeyre CN 11 1022 1711
Ostana CN 11 83 1794
Elva CN 11 97 1891
Stroppo CN 15 103 1994
Paesana CN 16 2784 4778
Macra CN 17 59 4837
Frassino CN 17 265 5102
Prazzo CN 17 170 5272
Celle di Macra CN 19 100 5372
Sanfront CN 19 2395 7767
Acceglio CN 19 162 7929
Bobbio Pellice TO 19 563 8492
Rorà TO 20 257 8749
Marmora CN 20 68 8817

Municipalities with at least 50000 inhabitants

An earthquake occurred to
46 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
Bulletin
Rev1000 		Md 2.0 1987-05-29
23:17:51		 44.637 7.082 11 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 48399
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-05-29 23:17:51 ± 0.147
Latitude 44.6370 ± 0.0104
Longitude 7.0820 ± 0.0264
Depth (km) 11 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 48399

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) 2382.5
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 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00113
Epicentral distance of station farthest from the epicenter (degree) 0.01222
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 2
Type of magnitude Md
Reference to an origin 48399
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:47:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.LRG.Z. 1987-05-29T23:18:33.20 10.0 undecidable manual SN 203 1.2876 0.37 0.5
--.LMR.Z. 1987-05-29T23:18:33.70 10.0 undecidable manual SN 197 1.3542 -0.93 0.1
--.FIN.Z. 1987-05-29T23:18:21.80 10.0 undecidable manual SG 117 0.9102 -1.13 0.1
--.IMI.Z. 1987-05-29T23:18:21.90 10.0 undecidable manual SG 141 0.9213 -1.6 0
--.LPG.Z. 1987-05-29T23:18:21.30 10.0 undecidable manual SG 344 0.888 -1 0.2
--.LSD.Z. 1987-05-29T23:18:20.00 10.0 undecidable manual SG 3 0.8214 -0.09 0.7
--.SBF.Z. 1987-05-29T23:18:18.50 10.0 undecidable manual SG 161 0.8103 -1.28 0.1
--.LRG.Z. 1987-05-29T23:18:16.00 10.0 undecidable manual PN 203 1.2876 0.52 0.9
--.LMR.Z. 1987-05-29T23:18:16.70 10.0 undecidable manual PN 197 1.3542 0.19 1.3
--.FRF.Z. 1987-05-29T23:18:13.40 10.0 undecidable manual PN 196 1.11 0.25 1.4
--.IMI.Z. 1987-05-29T23:18:10.00 10.0 undecidable manual PG 141 0.9213 -0.09 1.7
--.BNI.Z. 1987-05-29T23:18:09.00 10.0 undecidable manual SG 325 0.4995 -0.86 0.2
--.LPG.Z. 1987-05-29T23:18:09.50 10.0 undecidable manual PG 344 0.888 0.1 1.7
--.FIN.Z. 1987-05-29T23:18:09.90 10.0 undecidable manual PG 117 0.9102 0.14 1.7
--.LSD.Z. 1987-05-29T23:18:09.10 10.0 undecidable manual PG 3 0.8214 0.98 0.4
--.SBF.Z. 1987-05-29T23:18:08.10 10.0 undecidable manual PG 161 0.8103 0.16 1.8
--.STV.Z. 1987-05-29T23:18:06.60 10.0 undecidable manual SG 155 0.4218 -0.7 0.5
--.RRL.Z. 1987-05-29T23:18:04.70 10.0 undecidable manual SG 323 0.3552 -0.33 0.7
--.BNI.Z. 1987-05-29T23:18:01.50 10.0 undecidable manual PG 325 0.4995 -0.72 0.9
--.STV.Z. 1987-05-29T23:18:00.90 10.0 undecidable manual PG 155 0.4218 0.16 1.9
--.DOI.Z. 1987-05-29T23:17:59.70 10.0 undecidable manual SG 138 0.1665 0.33 1
--.RRL.Z. 1987-05-29T23:17:59.40 10.0 undecidable manual PG 323 0.3552 -0.03 1.9
--.PZZ.Z. 1987-05-29T23:17:57.90 10.0 undecidable manual SG 174 0.1221 -0.09 1.1
--.DOI.Z. 1987-05-29T23:17:56.70 10.0 undecidable manual PG 138 0.1665 0.54 2.5
--.PZZ.Z. 1987-05-29T23:17:55.60 10.0 undecidable manual PG 174 0.1221 0.24 1.8
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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