Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.1 on date 07-09-1991 and time 03:24:51 (Italy) in region 2 km NW Casteldelfino (CN)

A magnitude Md 2.1 earthquake occured in region: 2 km NW Casteldelfino (CN), on

  • 07-09-1991 01:24:51 (UTC)
  • 07-09-1991 03:24:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.6050, 7.0600 at 10 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
Casteldelfino CN 2 157 157
Pontechianale CN 3 179 336
Bellino CN 4 109 445
Elva CN 8 97 542
Sampeyre CN 11 1022 1564
Stroppo CN 12 103 1667
Crissolo CN 13 168 1835
Oncino CN 13 76 1911
Prazzo CN 14 170 2081
Ostana CN 14 83 2164
Macra CN 15 59 2223
Acceglio CN 15 162 2385
Marmora CN 17 68 2453
Canosio CN 17 80 2533
Celle di Macra CN 17 100 2633
Frassino CN 18 265 2898
Paesana CN 20 2784 5682

Municipalities with at least 50000 inhabitants

An earthquake occurred to
46 Km NW of Cuneo (56081 inhabitants)
66 Km SW of Moncalieri (57294 inhabitants)
72 Km SW of Torino (890529 inhabitants)
96 Km W 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 2.1
M 2.4 		1991-09-07
01:24:51		 44.605 7.06 10 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 148929
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-09-07 01:24:51 ± 0.177
Latitude 44.6050 ± 0.0098
Longitude 7.0600 ± 0.0254
Depth (km) 10 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 148929

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) 2290.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 101
Number of associated phases, regardless of their use for origin computation 37
Number of defining phases 37
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00089
Epicentral distance of station farthest from the epicenter (degree) 0.03181
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 148929
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:18:59

M:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 148929
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
--.BGF.Z. 1991-09-07T01:25:47.00 10.0 undecidable manual PN 305 3.5298 1.38 0.1
--.LMR.Z. 1991-09-07T01:25:32.60 10.0 undecidable manual SN 197 1.3209 -0.56 0.5
--.LRG.Z. 1991-09-07T01:25:31.70 10.0 undecidable manual SN 203 1.2543 0.34 0.6
--.PCP.Z. 1991-09-07T01:25:26.43 10.0 undecidable manual SN! 92 1.0545 -0.28 0
--.FRF.Z. 1991-09-07T01:25:25.00 10.0 undecidable manual SN 196 1.0767 -2.32 0
--.IMI.Z. 1991-09-07T01:25:21.70 10.0 undecidable manual SG 139 0.9102 -1.26 0.2
--.LPG.Z. 1991-09-07T01:25:21.20 10.0 undecidable manual SG 346 0.9213 -1.23 0.2
--.FIN.Z. 1991-09-07T01:25:20.76 10.0 undecidable manual SG 115 0.9102 -1.46 0.1
--.LSD.Z. 1991-09-07T01:25:19.59 10.0 undecidable manual SG 4 0.8547 -0.79 0.4
--.CKI.Z. 1991-09-07T01:25:19.88 10.0 undecidable manual SG 101 0.8769 -1.57 0.1
--.SBF.Z. 1991-09-07T01:25:17.30 10.0 undecidable manual SG 159 0.777 -0.98 0.3
--.LMR.Z. 1991-09-07T01:25:16.40 10.0 undecidable manual PN 197 1.3209 1.03 0.6
--.LRG.Z. 1991-09-07T01:25:15.30 10.0 undecidable manual PN 203 1.2543 0.98 0.7
--.FRF.Z. 1991-09-07T01:25:11.30 10.0 undecidable manual PN 196 1.0767 -0.7 1.1
--.PCP.Z. 1991-09-07T01:25:11.93 10.0 undecidable manual PN 92 1.0545 0.29 1.6
--.RSP.Z. 1991-09-07T01:25:10.98 10.0 undecidable manual SG 14 0.555 -0.1 0.8
--.LPG.Z. 1991-09-07T01:25:09.00 10.0 undecidable manual PG 346 0.9213 -0.17 1.8
--.IMI.Z. 1991-09-07T01:25:09.70 10.0 undecidable manual PG 139 0.9102 -0.04 1.9
--.LPL.Z. 1991-09-07T01:25:09.40 10.0 undecidable manual PG 345 0.9324 -0.17 1.8
--.FIN.Z. 1991-09-07T01:25:08.97 10.0 undecidable manual PG 115 0.9102 -0.08 1.9
--.BNI.Z. 1991-09-07T01:25:08.13 10.0 undecidable manual SG 328 0.5217 -1.59 0.1
--.LSD.Z. 1991-09-07T01:25:08.39 10.0 undecidable manual PG 4 0.8547 0.4 1.7
--.CKI.Z. 1991-09-07T01:25:08.87 10.0 undecidable manual PG 101 0.8769 0.27 1.8
--.ENR.Z. 1991-09-07T01:25:06.97 10.0 undecidable manual SG 145 0.444 -0.68 0.5
--.SBF.Z. 1991-09-07T01:25:06.60 10.0 undecidable manual PG 159 0.777 -0.18 2
--.STV.Z. 1991-09-07T01:25:05.17 10.0 undecidable manual SG 151 0.3996 -0.71 0.5
--.RRL.Z. 1991-09-07T01:25:03.94 10.0 undecidable manual SG 328 0.3663 -0.94 0.4
--.RSP.Z. 1991-09-07T01:25:02.92 10.0 undecidable manual PG 14 0.555 0.31 1.8
--.BNI.Z. 1991-09-07T01:25:01.34 10.0 undecidable manual PG 328 0.5217 -0.49 1.6
--.ENR.Z. 1991-09-07T01:25:00.84 10.0 undecidable manual PG 145 0.444 0.2 1.9
--.STV.Z. 1991-09-07T01:24:59.66 10.0 undecidable manual PG 151 0.3996 0.05 2
--.DOI.Z. 1991-09-07T01:24:59.16 10.0 undecidable manual SG 127 0.1665 0.86 0.4
--.RRL.Z. 1991-09-07T01:24:58.61 10.0 undecidable manual PG 328 0.3663 -0.43 1.7
--.BHB.Z. 1991-09-07T01:24:58.10 10.0 undecidable manual PG 32 0.2664 0.84 1.1
--.PZZ.Z. 1991-09-07T01:24:56.76 10.0 undecidable manual SG 163 0.0999 0.4 0.7
--.DOI.Z. 1991-09-07T01:24:55.94 10.0 undecidable manual PG 127 0.1665 0.7 1.3
--.PZZ.Z. 1991-09-07T01:24:54.51 10.0 undecidable manual PG 163 0.0999 0.39 1.8
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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