Earthquake with magnitude of M 2.4 on date 21-02-1985 and time 10:11:44 (UTC) in region 6 km S Demonte (CN)

A magnitude M 2.4 earthquake occured in region: 6 km S Demonte (CN), on

  • 21-02-1985 10:11:44 (UTC)
  • 21-02-1985 11:11:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.26, 7.31 at 9 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
Demonte CN 6 2003 2003
Valdieri CN 7 935 2938
Entracque CN 8 774 3712
Moiola CN 9 234 3946
Aisone CN 9 248 4194
Valloriate CN 10 109 4303
Gaiola CN 11 582 4885
Roaschia CN 12 107 4992
Vinadio CN 12 644 5636
Rittana CN 12 109 5745
Roccasparvera CN 14 741 6486
Roccavione CN 15 2761 9247
Borgo San Dalmazzo CN 16 12468 21715
Monterosso Grana CN 16 505 22220
Robilante CN 16 2306 24526
Vignolo CN 17 2600 27126
Bernezzo CN 17 4104 31230
Valgrana CN 17 786 32016
Pradleves CN 17 250 32266
Castelmagno CN 18 66 32332
Vernante CN 18 1178 33510
Cervasca CN 18 5013 38523
Caraglio CN 20 6836 45359
Montemale di Cuneo CN 20 241 45600

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km SW of Cuneo (56081 inhabitants)
62 Km NW of Sanremo (54807 inhabitants)
87 Km SW of Moncalieri (57294 inhabitants)
93 Km W of Savona (61345 inhabitants)
95 Km SW of Torino (890529 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 M 2.4 1985-02-21
10:11:44
44.27 7.31 9 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 2139
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-21 10:11:44 ± 0.332
Latitude 44.27 ± 0.02
Longitude 7.31 ± 0.03
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 2139

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) 3329.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 311
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) 0.00016
Epicentral distance of station farthest from the epicenter (degree) 0.00575
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

M:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 2139
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:48:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.FIN.Z. 1985-02-21T10:12:06.10 10.0 undecidable manual SG 94 0.0057 -0.86 0
--.IMP.Z. 1985-02-21T10:12:03.50 10.0 undecidable manual SG 129 0.0049 -0.2 0.4
--.ROB.Z. 1985-02-21T10:11:59.50 10.0 undecidable manual SG 84 0.0036 0.29 0.4
--.FIN.Z. 1985-02-21T10:11:57.00 10.0 undecidable manual PG 94 0.0057 -0.29 0.8
--.IMP.Z. 1985-02-21T10:11:55.60 10.0 undecidable manual PG 129 0.0049 0.2 1.1
--.ROB.Z. 1985-02-21T10:11:53.20 10.0 undecidable manual PG 84 0.0036 0.38 0.8
--.ENR.Z. 1985-02-21T10:11:48.60 10.0 undecidable manual SG 115 0.0007 -0.02 1
--.ENR.Z. 1985-02-21T10:11:47.00 10.0 undecidable manual PG 115 0.0007 0.29 2.2
--.STV.Z. 1985-02-21T10:11:45.60 10.0 undecidable manual PG 133 0.0002 -0.29 2.2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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