Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.4 on date 17-02-1989 and time 21:04:59 (Italy) in region 6 km E Sestriere (TO)

A magnitude Md 2.4 earthquake occured in region: 6 km E Sestriere (TO), on

  • 17-02-1989 20:04:59 (UTC)
  • 17-02-1989 21:04:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.9440, 6.9550 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
Sestriere TO 6 929 929
Sauze di Cesana TO 7 244 1173
Salza di Pinerolo TO 8 75 1248
Pragelato TO 8 776 2024
Massello TO 8 51 2075
Prali TO 10 246 2321
Sauze d'Oulx TO 12 1109 3430
Cesana Torinese TO 13 967 4397
Perrero TO 13 659 5056
Fenestrelle TO 13 544 5600
Usseaux TO 13 186 5786
Oulx TO 14 3307 9093
Roure TO 15 848 9941
Salbertrand TO 15 596 10537
Claviere TO 16 214 10751
Exilles TO 17 273 11024
Pomaretto TO 18 1009 12033
Perosa Argentina TO 19 3285 15318
Chiomonte TO 20 916 16234
Bobbio Pellice TO 20 563 16797

Municipalities with at least 50000 inhabitants

An earthquake occurred to
58 Km W of Moncalieri (57294 inhabitants)
59 Km W of Torino (890529 inhabitants)
77 Km NW of Cuneo (56081 inhabitants)
99 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 2.4
ML-VAX 1.7 		1989-02-17
20:04:59		 44.944 6.955 8 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 87179
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-02-17 20:04:59 ± 0.263
Latitude 44.9440 ± 0.0110
Longitude 6.9550 ± 0.0244
Depth (km) 8 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 87179

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) 2275.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 72
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00105
Epicentral distance of station farthest from the epicenter (degree) 0.02955
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:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 87179
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:21:50

ML:1.7

Field Value
Value 1.7
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 87179
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.BGF.Z. 1989-02-17T20:05:52.60 10.0 undecidable manual PN 300 3.2745 2.02 0.1
--.SBF.Z. 1989-02-17T20:05:37.00 10.0 undecidable manual SN 162 1.1322 -0.08 0.6
--.IMI.Z. 1989-02-17T20:05:37.30 10.0 undecidable manual SN 146 1.221 -2.1 0
--.FIN.Z. 1989-02-17T20:05:36.20 10.0 undecidable manual SN 128 1.1544 -1.42 0.2
--.CKI.Z. 1989-02-17T20:05:35.20 10.0 undecidable manual SN 118 1.0656 -0.52 0.6
--.ORO.Z. 1989-02-17T20:05:32.80 10.0 undecidable manual SG 46 0.9879 -1.2 0.4
--.ORX.Z. 1989-02-17T20:05:32.30 10.0 undecidable manual SG 45 0.9879 -1.09 0.4
--.ROB.Z. 1989-02-17T20:05:29.80 10.0 undecidable manual SG 134 0.9102 -0.98 0.5
--.LRG.Z. 1989-02-17T20:05:28.50 10.0 undecidable manual PN 196 1.5429 1.79 0.3
--.LMR.Z. 1989-02-17T20:05:28.90 10.0 undecidable manual PN 191 1.6317 0.92 0.9
--.FRF.Z. 1989-02-17T20:05:26.20 10.0 undecidable manual PN 189 1.3875 1.52 0.5
--.STV.Z. 1989-02-17T20:05:24.20 10.0 undecidable manual SG 158 0.7326 -1 0.4
--.SBF.Z. 1989-02-17T20:05:22.20 10.0 undecidable manual PN 162 1.1322 1.19 0.8
--.IMI.Z. 1989-02-17T20:05:22.70 10.0 undecidable manual PN 146 1.221 0.35 1.5
--.FIN.Z. 1989-02-17T20:05:21.70 10.0 undecidable manual PN 128 1.1544 0.38 1.5
--.LPL.Z. 1989-02-17T20:05:19.10 10.0 undecidable manual SG 344 0.5883 -1.31 0.2
--.CKI.Z. 1989-02-17T20:05:18.87 10.0 undecidable manual PN 118 1.0656 -1.37 0.6
--.ORX.Z. 1989-02-17T20:05:18.90 10.0 undecidable manual PG 45 0.9879 0.02 1.7
--.LSD.Z. 1989-02-17T20:05:18.10 10.0 undecidable manual SG 15 0.5328 -0.37 0.7
--.ORO.Z. 1989-02-17T20:05:18.95 10.0 negative manual PG 46 0.9879 0.13 3.4
--.LPG.Z. 1989-02-17T20:05:18.50 10.0 undecidable manual SG 345 0.5661 -1.23 0.2
--.ROB.Z. 1989-02-17T20:05:17.40 10.0 undecidable manual PG 134 0.9102 0.02 1.8
--.DOI.Z. 1989-02-17T20:05:15.33 10.0 undecidable manual SG 154 0.4884 -1.67 0.1
--.STV.Z. 1989-02-17T20:05:14.30 10.0 undecidable manual PG 158 0.7326 0.13 1.9
--.PZZ.Z. 1989-02-17T20:05:14.90 10.0 undecidable manual SG 166 0.444 -0.97 0.4
--.LPG.Z. 1989-02-17T20:05:11.20 10.0 undecidable manual PG 345 0.5661 0.2 1.9
--.LPL.Z. 1989-02-17T20:05:11.70 10.0 undecidable manual PG 344 0.5883 0.3 1.8
--.RSP.Z. 1989-02-17T20:05:10.90 10.0 undecidable manual SG 45 0.2997 0.05 0.7
--.LSD.Z. 1989-02-17T20:05:10.40 10.0 undecidable manual PG 15 0.5328 0.13 1.9
--.DOI.Z. 1989-02-17T20:05:09.26 10.0 undecidable manual PG 154 0.4884 -0.16 1.9
--.PZZ.Z. 1989-02-17T20:05:08.60 10.0 undecidable manual PG 166 0.444 -0.17 1.8
--.RSP.Z. 1989-02-17T20:05:06.70 10.0 undecidable manual PG 45 0.2997 0.84 1
--.BNI.Z. 1989-02-17T20:05:06.53 10.0 undecidable manual SG 298 0.2109 -1.55 0.1
--.RRL.Z. 1989-02-17T20:05:03.30 10.0 undecidable manual SG 258 0.1221 -1.27 0.2
--.BNI.Z. 1989-02-17T20:05:03.97 10.0 positive manual PG 298 0.2109 -0.31 3.4
--.RRL.Z. 1989-02-17T20:05:02.00 10.0 undecidable manual PG 258 0.1221 -0.24 1.7
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