Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.4 on date 21-09-1991 and time 09:19:58 (Italy) in region 6 km SW Sauze di Cesana (TO)

A magnitude Md 2.4 earthquake occured in region: 6 km SW Sauze di Cesana (TO), on

  • 21-09-1991 07:19:58 (UTC)
  • 21-09-1991 09:19:58 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.8980, 6.8280 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.

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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
Sauze di Cesana TO 6 244 244
Cesana Torinese TO 7 967 1211
Claviere TO 8 214 1425
Sestriere TO 8 929 2354
Sauze d'Oulx TO 15 1109 3463
Oulx TO 15 3307 6770
Pragelato TO 16 776 7546
Prali TO 18 246 7792
Salza di Pinerolo TO 19 75 7867
Massello TO 19 51 7918
Salbertrand TO 20 596 8514

Municipalities with at least 50000 inhabitants

An earthquake occurred to
69 Km W of Moncalieri (57294 inhabitants)
70 Km W of Torino (890529 inhabitants)
80 Km NW of Cuneo (56081 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 2.4
M 2.7 		1991-09-21
07:19:58		 44.898 6.828 8 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 149569
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-09-21 07:19:58 ± 0.157
Latitude 44.8980 ± 0.0073
Longitude 6.8280 ± 0.0173
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 149569

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) 1587.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 90
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 46
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) 0.00032
Epicentral distance of station farthest from the epicenter (degree) 0.02906
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 24
Magnitudes information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 149569
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:19:36

M:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 149569
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
--.PGF.Z. 1991-09-21T07:21:17.00 10.0 undecidable manual SN 145 2.8194 0.01 0.5
--.BGF.Z. 1991-09-21T07:20:51.20 10.0 undecidable manual PN 302 3.2301 1.63 0.1
--.LMR.Z. 1991-09-21T07:20:48.20 10.0 undecidable manual SN 188 1.5762 0.78 0.4
--.PGF.Z. 1991-09-21T07:20:46.00 10.0 undecidable manual PN! 145 2.8194 2.08 0
--.LRG.Z. 1991-09-21T07:20:44.80 10.0 undecidable manual SN 193 1.4763 -0.26 0.6
--.CDR.Z. 1991-09-21T07:20:43.60 10.0 undecidable manual SN 212 1.443 -0.46 0.5
--.PCP.Z. 1991-09-21T07:20:41.23 10.0 undecidable manual SN 105 1.2654 1.18 0.2
--.FRF.Z. 1991-09-21T07:20:40.80 10.0 undecidable manual SN 185 1.3431 -0.98 0.2
--.IMI.Z. 1991-09-21T07:20:39.43 10.0 undecidable manual SN 141 1.2432 -0.04 0.8
--.FIN.Z. 1991-09-21T07:20:38.54 10.0 undecidable manual SN 124 1.1988 0.14 0.8
--.CKI.Z. 1991-09-21T07:20:36.00 10.0 undecidable manual SN 114 1.1322 -0.87 0.3
--.ORX.Z. 1991-09-21T07:20:35.72 10.0 undecidable manual SN 47 1.0878 -0.13 0.8
--.SBF.Z. 1991-09-21T07:20:35.60 10.0 undecidable manual SN 157 1.11 -0.92 0.3
--.ROB.Z. 1991-09-21T07:20:31.23 10.0 undecidable manual SG 128 0.9435 -0.44 0.7
--.LMR.Z. 1991-09-21T07:20:28.20 10.0 undecidable manual PN 188 1.5762 1.35 0.3
--.LRG.Z. 1991-09-21T07:20:26.00 10.0 undecidable manual PN 193 1.4763 0.51 1.5
--.CDR.Z. 1991-09-21T07:20:25.70 10.0 undecidable manual PN 212 1.443 0.79 1.1
--.ENR.Z. 1991-09-21T07:20:25.33 10.0 undecidable manual SG 147 0.7881 -1.21 0.2
--.FRF.Z. 1991-09-21T07:20:23.79 10.0 undecidable manual PN 185 1.3431 0.2 1.9
--.STV.Z. 1991-09-21T07:20:23.98 10.0 undecidable manual SG 150 0.7326 -0.82 0.4
--.PCP.Z. 1991-09-21T07:20:23.47 10.0 undecidable manual PN 105 1.2654 0.88 0.9
--.FIN.Z. 1991-09-21T07:20:22.30 10.0 undecidable manual PN 124 1.1988 0.39 1.8
--.IMI.Z. 1991-09-21T07:20:22.44 10.0 undecidable manual PN 141 1.2432 0.18 1.9
--.CKI.Z. 1991-09-21T07:20:21.00 10.0 undecidable manual PN 114 1.1322 0.24 2
--.SBF.Z. 1991-09-21T07:20:21.00 10.0 undecidable manual PN 157 1.11 0.45 1.7
--.LSD.Z. 1991-09-21T07:20:20.20 10.0 undecidable manual SG 22 0.5994 -0.31 0.6
--.ORX.Z. 1991-09-21T07:20:20.80 10.0 undecidable manual PN 47 1.0878 -0.09 2
--.LPG.Z. 1991-09-21T07:20:20.20 10.0 undecidable manual SG 354 0.5883 -0.2 0.7
--.LPL.Z. 1991-09-21T07:20:20.70 10.0 undecidable manual SG 353 0.6216 -0.34 0.6
--.ROB.Z. 1991-09-21T07:20:17.62 10.0 undecidable manual PG 128 0.9435 -0.14 2.2
--.RSP.Z. 1991-09-21T07:20:15.37 10.0 undecidable manual SG 49 0.3885 1.6 0.1
--.DOI.Z. 1991-09-21T07:20:15.50 10.0 undecidable manual SG 142 0.4884 -1.43 0.1
--.ENR.Z. 1991-09-21T07:20:14.31 10.0 undecidable manual PG 147 0.7881 -0.48 1.7
--.PZZ.Z. 1991-09-21T07:20:14.75 10.0 undecidable manual SG 153 0.4329 -0.41 0.7
--.STV.Z. 1991-09-21T07:20:13.31 10.0 undecidable manual PG 150 0.7326 -0.48 1.7
--.LPL.Z. 1991-09-21T07:20:11.20 10.0 undecidable manual PG 353 0.6216 -0.42 1.5
--.LSD.Z. 1991-09-21T07:20:11.36 10.0 undecidable manual PG 22 0.5994 0.05 2.2
--.LPG.Z. 1991-09-21T07:20:10.79 10.0 undecidable manual PG 354 0.5883 -0.46 1.4
--.DOI.Z. 1991-09-21T07:20:09.00 10.0 undecidable manual PG 142 0.4884 -0.24 2.1
--.RSP.Z. 1991-09-21T07:20:08.18 10.0 undecidable manual PG 49 0.3885 0.76 1.3
--.PZZ.Z. 1991-09-21T07:20:07.78 10.0 undecidable manual PG 153 0.4329 -0.45 1.8
--.BHB.Z. 1991-09-21T07:20:06.36 10.0 undecidable manual PG 101 0.3108 0.45 1.5
--.BNI.Z. 1991-09-21T07:20:05.50 10.0 undecidable manual SG 325 0.1776 -0.91 0.4
--.BNI.Z. 1991-09-21T07:20:02.50 10.0 undecidable manual PG 325 0.1776 -0.67 1.1
--.RRL.Z. 1991-09-21T07:20:02.33 10.0 undecidable manual SG 304 0.0333 0.53 0.6
--.RRL.Z. 1991-09-21T07:20:00.60 10.0 undecidable manual PG 304 0.0333 0.09 2.2
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