Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.0 on date 17-03-1990 and time 03:55:09 (UTC) in region 2 km S Polonghera (CN)

A magnitude Md 2.0 earthquake occured in region: 2 km S Polonghera (CN), on

  • 17-03-1990 03:55:09 (UTC)
  • 17-03-1990 04:55:09 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.7850, 7.6020 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
Polonghera CN 2 1160 1160
Faule CN 3 486 1646
Murello CN 4 966 2612
Casalgrasso CN 4 1480 4092
Pancalieri TO 5 2038 6130
Moretta CN 6 4136 10266
Racconigi CN 6 10038 20304
Villanova Solaro CN 6 772 21076
Lombriasco TO 7 1050 22126
Cavallerleone CN 7 644 22770
Villafranca Piemonte TO 8 4729 27499
Torre San Giorgio CN 8 730 28229
Ruffia CN 9 367 28596
Osasio TO 10 936 29532
Virle Piemonte TO 10 1206 30738
Vigone TO 11 5182 35920
Cardè CN 11 1122 37042
Cavallermaggiore CN 11 5533 42575
Monasterolo di Savigliano CN 11 1371 43946
Caramagna Piemonte CN 11 3034 46980
Carmagnola TO 12 29079 76059
Cercenasco TO 12 1803 77862
Scarnafigi CN 12 2162 80024
Castagnole Piemonte TO 13 2245 82269
Scalenghe TO 14 3339 85608
Sommariva del Bosco CN 15 6361 91969
Carignano TO 15 9261 101230
Savigliano CN 16 21441 122671
Sanfrè CN 16 3040 125711
Piobesi Torinese TO 17 3763 129474
Marene CN 17 3175 132649
None TO 17 8005 140654
Airasca TO 17 3794 144448
Ceresole Alba CN 17 2090 146538
Saluzzo CN 18 16960 163498
Macello TO 18 1229 164727
Cavour TO 18 5545 170272
Buriasco TO 18 1410 171682
Lagnasco CN 18 1453 173135
Vinovo TO 19 14887 188022
Garzigliana TO 19 572 188594
Villastellone TO 19 4779 193373
Candiolo TO 20 5669 199042
La Loggia TO 20 8874 207916

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km S of Moncalieri (57294 inhabitants)
33 Km S of Torino (890529 inhabitants)
44 Km N of Cuneo (56081 inhabitants)
49 Km W of Asti (76202 inhabitants)
81 Km W of Alessandria (93943 inhabitants)
88 Km NW of Savona (61345 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 2.0
M 2.2 		1990-03-17
03:55:09		 44.785 7.602 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 112109
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-03-17 03:55:09 ± 0.101
Latitude 44.7850 ± 0.0060
Longitude 7.6020 ± 0.0141
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 112109

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) 1297.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 125
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
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) 0.00340
Epicentral distance of station farthest from the epicenter (degree) 0.00801
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

Md:2.0

Field Value
Value 2.0
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 112109
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:44:12

M:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 112109
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
--.IMI.Z. 1990-03-17T03:55:28.10 10.0 undecidable manual PG 166 0.888 0.37 0.5
--.ORX.Z. 1990-03-17T03:55:27.28 10.0 undecidable manual PG 17 0.8769 -0.26 0.8
--.LSD.Z. 1990-03-17T03:55:24.92 10.0 undecidable manual PG 334 0.7326 0.09 1.3
--.FIN.Z. 1990-03-17T03:55:24.32 10.0 undecidable manual PG 142 0.7215 -0.12 1.3
--.DOI.Z. 1990-03-17T03:55:23.50 10.0 undecidable manual SG 221 0.3774 -0.54 0.1
--.RRL.Z. 1990-03-17T03:55:22.46 10.0 undecidable manual PG 283 0.5883 0.36 0.7
--.STV.Z. 1990-03-17T03:55:21.73 10.0 undecidable manual PG 199 0.5661 0.14 1.4
--.ENR.Z. 1990-03-17T03:55:21.73 10.0 undecidable manual PG 192 0.5661 0.04 1.5
--.ROB.Z. 1990-03-17T03:55:20.72 10.0 undecidable manual PG 157 0.5106 0.01 1.6
--.PZZ.Z. 1990-03-17T03:55:19.69 10.0 undecidable manual PG 231 0.444 0.23 1.1
--.RSP.Z. 1990-03-17T03:55:19.18 10.0 undecidable manual PG 326 0.4329 -0.05 1.5
--.DOI.Z. 1990-03-17T03:55:17.50 10.0 undecidable manual PG 221 0.3774 -0.59 0.2
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