Earthquake with magnitude of Md 2.0 on date 23-04-1986 and time 22:57:03 (Italy) in region 4 km W Elva (CN)

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

  • 23-04-1986 20:57:03 (UTC)
  • 23-04-1986 22:57:03 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.54, 7.04 at 11 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
Elva CN 4 97 97
Bellino CN 5 109 206
Casteldelfino CN 6 157 363
Prazzo CN 7 170 533
Stroppo CN 8 103 636
Acceglio CN 8 162 798
Pontechianale CN 9 179 977
Canosio CN 10 80 1057
Marmora CN 10 68 1125
Macra CN 12 59 1184
Sampeyre CN 13 1022 2206
Celle di Macra CN 13 100 2306
San Damiano Macra CN 18 430 2736
Frassino CN 19 265 3001
Oncino CN 19 76 3077
Argentera CN 19 83 3160
Crissolo CN 20 168 3328

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km W of Cuneo (56081 inhabitants)
72 Km SW of Moncalieri (57294 inhabitants)
78 Km SW of Torino (890529 inhabitants)
100 Km NW of Sanremo (54807 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 1986-04-23
20:57:03
44.54 7.04 11 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 25949
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-04-23 20:57:03 ± 0.196
Latitude 44.54 ± 0.01
Longitude 7.04 ± 0.03
Depth (km) 11 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 25949

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) 2657.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 189
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
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) 0.00049
Epicentral distance of station farthest from the epicenter (degree) 0.00818
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 25949
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:27:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.LSD.Z. 1986-04-23T20:57:34.40 10.0 undecidable manual SG 5 0.0082 -0.48 0.2
--.LSD.Z. 1986-04-23T20:57:21.90 10.0 undecidable manual PG 5 0.0082 0.26 1.1
--.RRL.Z. 1986-04-23T20:57:18.40 10.0 undecidable manual SG 334 0.0037 -0.49 0.4
--.STV.Z. 1986-04-23T20:57:16.40 10.0 undecidable manual SG 144 0.0032 -0.59 0.2
--.RRL.Z. 1986-04-23T20:57:12.50 10.0 undecidable manual PG 334 0.0037 0.09 2.2
--.STV.Z. 1986-04-23T20:57:11.20 10.0 undecidable manual PG 144 0.0032 -0.12 2.3
--.DA9.Z. 1986-04-23T20:57:10.00 10.0 undecidable manual SG 105 0.0013 -0.41 0.5
--.DA9.Z. 1986-04-23T20:57:08.00 10.0 undecidable manual PG 105 0.0013 0.48 1
--.SOO.Z. 1986-04-23T20:57:07.50 10.0 undecidable manual SG 132 0.0005 -0.48 0.4
--.SOO.Z. 1986-04-23T20:57:06.40 10.0 undecidable manual PG 132 0.0005 0.29 1.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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