Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.5 on date 26-06-1986 and time 11:54:23 (Italy) in region 2 km S Roaschia (CN)

A magnitude Md 2.5 earthquake occured in region: 2 km S Roaschia (CN), on

  • 26-06-1986 09:54:23 (UTC)
  • 26-06-1986 11:54:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2540, 7.4640 at 17 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
Roaschia CN 2 107 107
Entracque CN 5 774 881
Vernante CN 6 1178 2059
Robilante CN 6 2306 4365
Valdieri CN 6 935 5300
Roccavione CN 7 2761 8061
Borgo San Dalmazzo CN 9 12468 20529
Moiola CN 10 234 20763
Roccasparvera CN 10 741 21504
Gaiola CN 10 582 22086
Limone Piemonte CN 11 1485 23571
Boves CN 11 9835 33406
Valloriate CN 12 109 33515
Rittana CN 12 109 33624
Vignolo CN 12 2600 36224
Cervasca CN 15 5013 41237
Demonte CN 15 2003 43240
Peveragno CN 15 5543 48783
Bernezzo CN 15 4104 52887
Cuneo CN 17 56081 108968
Caraglio CN 19 6836 115804
Valgrana CN 19 786 116590
Chiusa di Pesio CN 19 3676 120266
Beinette CN 19 3423 123689

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km SW of Cuneo (56081 inhabitants)
55 Km NW of Sanremo (54807 inhabitants)
81 Km W of Savona (61345 inhabitants)
85 Km S of Moncalieri (57294 inhabitants)
93 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
Bulletin
Rev1000 		Md 2.5
M 2.5 		1986-06-26
09:54:23		 44.254 7.464 17 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 30209
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-06-26 09:54:23 ± 0.316
Latitude 44.2540 ± 0.0156
Longitude 7.4640 ± 0.0141
Depth (km) 17 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 30209

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) 2067.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
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) 0.00032
Epicentral distance of station farthest from the epicenter (degree) 0.00542
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 30209
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:31:26

M:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 30209
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(km) Takeoff_angle Residual Weight
--.CKI.Z. 1986-06-26T09:54:46.00 10.0 undecidable manual SG 73 0.5994 0.56 0.1
--.FIN.Z. 1986-06-26T09:54:42.10 10.0 undecidable manual SG 94 0.5328 -1.1 0
--.IMP.Z. 1986-06-26T09:54:41.20 10.0 undecidable manual SG 137 0.444 0.5 0.1
--.SOO.Z. 1986-06-26T09:54:37.50 10.0 undecidable manual SG 314 0.3552 -0.2 0.4
--.CKI.Z. 1986-06-26T09:54:36.70 10.0 undecidable manual PG 73 0.5994 0.34 0.6
--.DA9.Z. 1986-06-26T09:54:36.00 10.0 undecidable manual SG 327 0.2886 0.32 0.5
--.ROB.Z. 1986-06-26T09:54:35.80 10.0 undecidable manual SG 80 0.2997 0.06 0.8
--.FIN.Z. 1986-06-26T09:54:34.60 10.0 undecidable manual PG 94 0.5328 -0.46 0.4
--.IMP.Z. 1986-06-26T09:54:33.90 10.0 undecidable manual PG 137 0.444 0.27 0.8
--.SOO.Z. 1986-06-26T09:54:31.80 10.0 undecidable manual PG 314 0.3552 -0.09 1.3
--.ROB.Z. 1986-06-26T09:54:30.70 10.0 undecidable manual PG 80 0.2997 -0.06 2.6
--.DA9.Z. 1986-06-26T09:54:30.80 10.0 negative manual PG 327 0.2886 0.07 2.6
--.ENR.Z. 1986-06-26T09:54:27.40 10.0 undecidable manual PG 229 0.0333 0.18 2.2
--.STV.Z. 1986-06-26T09:54:27.40 10.0 undecidable manual PG 268 0.0888 -0.27 1.8
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download