Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.2 on date 28-09-1991 and time 22:16:38 (Italy) in region Confine Italia Francia (FRANCIA)

A magnitude Md 2.2 earthquake occured in region: Confine Italia Francia (FRANCIA), on

  • 28-09-1991 20:16:38 (UTC)
  • 28-09-1991 22:16:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.3830, 6.6110 at 5 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
91 Km W of Torino (890529 inhabitants)
94 Km W of Moncalieri (57294 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 2.2
M 2.6 		1991-09-28
20:16:38		 45.383 6.611 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 150149
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-09-28 20:16:38 ± 0.101
Latitude 45.3830 ± 0.0065
Longitude 6.6110 ± 0.0105
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 150149

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) 1096.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 110
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 30
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) 0.00267
Epicentral distance of station farthest from the epicenter (degree) 0.02574
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 21
Magnitudes information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 150149
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:20:08

M:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 150149
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. 1991-09-28T20:17:24.60 10.0 undecidable manual PN 295 2.8527 -0.19 1.2
--.SSF.Z. 1991-09-28T20:17:23.20 10.0 undecidable manual PN 309 2.7084 0.36 0.9
--.AVF.Z. 1991-09-28T20:17:22.60 10.0 undecidable manual PN 303 2.6529 0.63 0.5
--.ENR.Z. 1991-09-28T20:17:22.00 10.0 undecidable manual SN 153 1.2876 0.88 0.1
--.LOR.Z. 1991-09-28T20:17:21.60 10.0 undecidable manual PN 315 2.664 -0.57 0.6
--.HAU.Z. 1991-09-28T20:17:21.60 10.0 undecidable manual PN 356 2.6196 0.09 1.3
--.STV.Z. 1991-09-28T20:17:20.20 10.0 undecidable manual SN 155 1.2321 0.27 0.7
--.LBF.Z. 1991-09-28T20:17:19.20 10.0 undecidable manual PN 312 2.4198 0.46 0.8
--.BSF.Z. 1991-09-28T20:17:19.20 10.0 undecidable manual PN 2 2.442 0.12 1.4
--.SMF.Z. 1991-09-28T20:17:16.80 10.0 undecidable manual PN 304 2.2866 -0.21 1.3
--.FRF.Z. 1991-09-28T20:17:14.50 10.0 undecidable manual PN! 179 1.8204 4.06 0
--.ORX.Z. 1991-09-28T20:17:13.29 10.0 undecidable manual SG 74 0.9879 -0.02 0.8
--.LRG.Z. 1991-09-28T20:17:12.00 10.0 undecidable manual PN 185 1.9314 -0.01 1.6
--.PZZ.Z. 1991-09-28T20:17:10.97 10.0 undecidable manual SG 158 0.9324 -0.77 0.2
--.ROB.Z. 1991-09-28T20:17:05.50 10.0 undecidable manual PN 139 1.3875 0.81 0.3
--.ENR.Z. 1991-09-28T20:17:03.54 10.0 undecidable manual PN 153 1.2876 0.39 1.3
--.STV.Z. 1991-09-28T20:17:02.52 10.0 undecidable manual PN 155 1.2321 0.06 2
--.ORX.Z. 1991-09-28T20:16:58.83 10.0 undecidable manual PG 74 0.9879 0.2 1.8
--.RSP.Z. 1991-09-28T20:16:57.60 10.0 undecidable manual SG 116 0.4995 -0.23 0.7
--.PZZ.Z. 1991-09-28T20:16:57.39 10.0 undecidable manual PG 158 0.9324 -0.34 1.5
--.RRL.Z. 1991-09-28T20:16:55.86 10.0 undecidable manual SG 165 0.4773 -0.95 0.1
--.LSD.Z. 1991-09-28T20:16:53.50 10.0 undecidable manual SG 78 0.3885 -0.19 0.7
--.BHB.Z. 1991-09-28T20:16:53.40 10.0 undecidable manual PG 139 0.7104 -0.12 2
--.BNI.Z. 1991-09-28T20:16:51.15 10.0 undecidable manual SG 171 0.333 -0.42 0.5
--.RSP.Z. 1991-09-28T20:16:50.11 10.0 undecidable manual PG 116 0.4995 0.41 1.3
--.RSL.Z. 1991-09-28T20:16:49.31 10.0 undecidable manual SG 1 0.2997 -1.19 0
--.RRL.Z. 1991-09-28T20:16:48.99 10.0 undecidable manual PG 165 0.4773 -0.13 2
--.LSD.Z. 1991-09-28T20:16:47.35 10.0 undecidable manual PG 78 0.3885 0.04 2
--.RSL.Z. 1991-09-28T20:16:45.20 10.0 undecidable manual PG 1 0.2997 -0.45 1.2
--.BNI.Z. 1991-09-28T20:16:45.68 10.0 undecidable manual PG 171 0.333 -0.41 1.3
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