Earthquake with magnitude of Md 2.0 on date 22-01-1987 and time 10:28:26 (Italy) in region 1 km E Valdieri (CN)

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

  • 22-01-1987 09:28:26 (UTC)
  • 22-01-1987 10:28:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.28, 7.41 at 8 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
Roaschia CN 4 107 1042
Entracque CN 4 774 1816
Moiola CN 5 234 2050
Gaiola CN 7 582 2632
Roccavione CN 7 2761 5393
Valloriate CN 8 109 5502
Roccasparvera CN 8 741 6243
Robilante CN 8 2306 8549
Borgo San Dalmazzo CN 8 12468 21017
Rittana CN 9 109 21126
Demonte CN 10 2003 23129
Vernante CN 10 1178 24307
Vignolo CN 10 2600 26907
Boves CN 13 9835 36742
Bernezzo CN 13 4104 40846
Cervasca CN 13 5013 45859
Valgrana CN 15 786 46645
Limone Piemonte CN 15 1485 48130
Caraglio CN 16 6836 54966
Aisone CN 16 248 55214
Monterosso Grana CN 17 505 55719
Cuneo CN 17 56081 111800
Peveragno CN 17 5543 117343
Montemale di Cuneo CN 18 241 117584
Pradleves CN 19 250 117834
Vinadio CN 19 644 118478

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km SW of Cuneo (56081 inhabitants)
59 Km NW of Sanremo (54807 inhabitants)
84 Km S of Moncalieri (57294 inhabitants)
85 Km W of Savona (61345 inhabitants)
91 Km S of Torino (890529 inhabitants)
94 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 1987-01-22
09:28:26
44.28 7.41 8 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 39659
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-01-22 09:28:26 ± 0.857
Latitude 44.28 ± 0.03
Longitude 7.41 ± 0.03
Depth (km) 8 ± 8 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 39659

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) 4554.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
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) 0.0004
Epicentral distance of station farthest from the epicenter (degree) 0.00291
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2

Field Value
Value 2
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 39659
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:39:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ROB.Z. 1987-01-22T09:28:40.80 10.0 undecidable manual SG 85 0.0029 1.42 0
--.SOO.Z. 1987-01-22T09:28:39.20 10.0 undecidable manual SG 315 0.0028 0.19 0.5
--.DA9.Z. 1987-01-22T09:28:36.50 10.0 undecidable manual SG 332 0.0023 -0.16 0.6
--.SOO.Z. 1987-01-22T09:28:33.80 10.0 undecidable manual PG 315 0.0028 0.11 1.4
--.ROB.Z. 1987-01-22T09:28:33.60 10.0 undecidable manual PG 85 0.0029 -0.3 1.2
--.DA9.Z. 1987-01-22T09:28:32.00 10.0 undecidable manual PG 332 0.0023 -0.34 1.3
--.STV.Z. 1987-01-22T09:28:31.00 10.0 undecidable manual SG 247 0.0006 0.94 0.1
--.STV.Z. 1987-01-22T09:28:28.80 10.0 undecidable manual PG 247 0.0006 0.28 1.5
--.ENR.Z. 1987-01-22T09:28:27.90 10.0 undecidable manual PG 174 0.0004 -0.41 2.5
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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