Earthquake with magnitude of Md 2.0 on date 08-04-1987 and time 13:29:30 (Italy) in region 1 km NE Valdieri (CN)

A magnitude Md 2.0 earthquake occured in region: 1 km NE Valdieri (CN), on

  • 08-04-1987 11:29:30 (UTC)
  • 08-04-1987 13:29:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.29, 7.4 at 13 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
Valdieri CN 1 935 935
Moiola CN 4 234 1169
Roaschia CN 5 107 1276
Entracque CN 5 774 2050
Gaiola CN 5 582 2632
Valloriate CN 6 109 2741
Roccasparvera CN 7 741 3482
Roccavione CN 7 2761 6243
Rittana CN 7 109 6352
Borgo San Dalmazzo CN 8 12468 18820
Robilante CN 9 2306 21126
Demonte CN 9 2003 23129
Vignolo CN 10 2600 25729
Vernante CN 12 1178 26907
Bernezzo CN 12 4104 31011
Cervasca CN 12 5013 36024
Boves CN 13 9835 45859
Valgrana CN 14 786 46645
Caraglio CN 15 6836 53481
Aisone CN 15 248 53729
Monterosso Grana CN 15 505 54234
Cuneo CN 17 56081 110315
Limone Piemonte CN 17 1485 111800
Montemale di Cuneo CN 17 241 112041
Pradleves CN 18 250 112291
Peveragno CN 18 5543 117834
Vinadio CN 18 644 118478

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km SW of Cuneo (56081 inhabitants)
60 Km NW of Sanremo (54807 inhabitants)
83 Km S of Moncalieri (57294 inhabitants)
86 Km W of Savona (61345 inhabitants)
90 Km S of Torino (890529 inhabitants)
93 Km SW 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
M 2.0
1987-04-08
11:29:30
44.29 7.4 13 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 44409
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-04-08 11:29:30 ± 0.186
Latitude 44.29 ± 0.01
Longitude 7.40 ± 0.02
Depth (km) 13 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 44409

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) 1799
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 114
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00057
Epicentral distance of station farthest from the epicenter (degree) 0.00518
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

Md:2

Field Value
Value 2
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 44409
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:43:51

M:2

Field Value
Value 2
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 44409
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:50:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.FIN.Z. 1987-04-08T11:29:50.60 10.0 undecidable manual SG 97 0.0052 -0.41 0.1
--.IMP.Z. 1987-04-08T11:29:48.30 10.0 undecidable manual SG 136 0.0045 -0.45 0.1
--.ROB.Z. 1987-04-08T11:29:43.80 10.0 undecidable manual SG 87 0.003 0.63 0
--.FIN.Z. 1987-04-08T11:29:42.10 10.0 undecidable manual PG 97 0.0052 -0.2 1.1
--.SOO.Z. 1987-04-08T11:29:42.20 10.0 undecidable manual SG 315 0.0028 -0.01 0.8
--.IMP.Z. 1987-04-08T11:29:41.20 10.0 undecidable manual PG 136 0.0045 0.21 1.1
--.DA9.Z. 1987-04-08T11:29:40.00 10.0 undecidable manual SG 332 0.0022 -0.23 0.7
--.SOO.Z. 1987-04-08T11:29:37.40 10.0 undecidable manual PG 315 0.0028 0.19 1.5
--.ROB.Z. 1987-04-08T11:29:37.90 10.0 undecidable manual PG 87 0.003 0.13 1.8
--.DA9.Z. 1987-04-08T11:29:36.00 10.0 undecidable manual PG 332 0.0022 -0.07 1.9
--.STV.Z. 1987-04-08T11:29:35.40 10.0 undecidable manual SG 235 0.0006 0 0.8
--.STV.Z. 1987-04-08T11:29:33.30 10.0 undecidable manual PG 235 0.0006 0.02 2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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