Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.6 on date 09-12-1985 and time 14:08:18 (UTC) in region 1 km E Balangero (TO)

A magnitude Md 2.6 earthquake occured in region: 1 km E Balangero (TO), on

  • 09-12-1985 14:08:18 (UTC)
  • 09-12-1985 15:08:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 45.2680, 7.5350 at 12 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
Balangero TO 1 3156 3156
Mathi TO 1 3921 7077
Grosso TO 2 1018 8095
Cafasse TO 3 3451 11546
Villanova Canavese TO 3 1186 12732
Nole TO 4 6892 19624
Lanzo Torinese TO 5 5086 24710
Corio TO 5 3277 27987
Germagnano TO 5 1201 29188
Vallo Torinese TO 6 774 29962
Fiano TO 6 2695 32657
Rocca Canavese TO 6 1708 34365
San Carlo Canavese TO 6 4031 38396
Ciriè TO 7 18909 57305
Vauda Canavese TO 7 1464 58769
Coassolo Torinese TO 7 1547 60316
Varisella TO 7 810 61126
Robassomero TO 8 3057 64183
Levone TO 8 442 64625
Barbania TO 8 1607 66232
Traves TO 8 518 66750
Monastero di Lanzo TO 8 350 67100
San Maurizio Canavese TO 9 10237 77337
La Cassa TO 10 1788 79125
Forno Canavese TO 10 3446 82571
Rivara TO 10 2659 85230
Front TO 10 1677 86907
Pessinetto TO 11 606 87513
San Francesco al Campo TO 11 5005 92518
Pratiglione TO 11 535 93053
Mezzenile TO 11 786 93839
Busano TO 12 1687 95526
Ceres TO 12 1065 96591
Givoletto TO 12 3914 100505
Pertusio TO 13 778 101283
Viù TO 13 1051 102334
Canischio TO 13 277 102611
Prascorsano TO 13 745 103356
Caselle Torinese TO 13 19136 122492
San Gillio TO 14 3174 125666
San Ponso TO 14 267 125933
Val della Torre TO 14 3869 129802
Favria TO 14 5196 134998
San Colombano Belmonte TO 14 383 135381
Rivarossa TO 15 1610 136991
Cantoira TO 15 564 137555
Valperga TO 15 3166 140721
Oglianico TO 15 1506 142227
Druento TO 15 8622 150849
Salassa TO 16 1838 152687
Borgaro Torinese TO 16 13592 166279
Lombardore TO 16 1742 168021
Sparone TO 16 1038 169059
Alpette TO 16 261 169320
Cuorgnè TO 17 9906 179226
Rivarolo Canavese TO 17 12488 191714
Venaria Reale TO 17 34193 225907
Leini TO 17 16356 242263
Feletto TO 17 2310 244573
Locana TO 18 1498 246071
Pont-Canavese TO 18 3483 249554
Bosconero TO 18 3167 252721
Chialamberto TO 18 345 253066
Caselette TO 18 3060 256126
Ribordone TO 19 53 256179
Rubiana TO 19 2400 258579
Pianezza TO 19 15152 273731
Ala di Stura TO 19 469 274200
Ozegna TO 19 1230 275430
Castellamonte TO 19 9859 285289
Ciconio TO 19 384 285673
Lusigliè TO 19 559 286232
Alpignano TO 19 17008 303240
Chiesanuova TO 19 205 303445
Lemie TO 19 179 303624
Frassinetto TO 20 274 303898
Borgiallo TO 20 569 304467
Almese TO 20 6401 310868

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km NW of Torino (890529 inhabitants)
32 Km NW of Moncalieri (57294 inhabitants)
67 Km NW of Asti (76202 inhabitants)
87 Km W of Novara (104380 inhabitants)
94 Km W of Alessandria (93943 inhabitants)
97 Km N of Cuneo (56081 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		Md 2.6 1985-12-09
14:08:18		 45.268 7.535 12 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 17769
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-12-09 14:08:18 ± 0.199
Latitude 45.2680 ± 0.0165
Longitude 7.5350 ± 0.0221
Depth (km) 12 ± 7 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 17769

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) 2524.9
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 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00291
Epicentral distance of station farthest from the epicenter (degree) 0.00939
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

Md:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 17769
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:20:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.SOO.Z. 1985-12-09T14:08:45.40 10.0 undecidable manual SG 201 0.8214 -1.35 0
--.RRL.Z. 1985-12-09T14:08:40.50 10.0 undecidable manual SG 236 0.6327 -0.23 0.7
--.ENR.Z. 1985-12-09T14:08:38.00 10.0 undecidable manual PN 184 1.0434 -0.65 0.7
--.ROB.Z. 1985-12-09T14:08:38.90 10.0 undecidable manual PN 165 0.9879 0.93 0.4
--.ORO.Z. 1985-12-09T14:08:35.00 10.0 undecidable manual SG 40 0.4662 -0.64 0.4
--.ORX.Z. 1985-12-09T14:08:35.00 10.0 undecidable manual SG 40 0.4773 -0.77 0.3
--.SOO.Z. 1985-12-09T14:08:34.50 10.0 undecidable manual PG 201 0.8214 -0.29 1.5
--.RRL.Z. 1985-12-09T14:08:32.00 10.0 undecidable manual PG 236 0.6327 0.69 0.9
--.BN9.Z. 1985-12-09T14:08:31.50 10.0 undecidable manual PG 250 0.6327 0.06 1.9
--.LSD.Z. 1985-12-09T14:08:30.10 10.0 undecidable manual SG 305 0.3219 -0.77 0.3
--.ORO.Z. 1985-12-09T14:08:28.50 10.0 undecidable manual PG 40 0.4662 0.13 1.9
--.ORX.Z. 1985-12-09T14:08:28.70 10.0 undecidable manual PG 40 0.4773 0.26 1.8
--.LSD.Z. 1985-12-09T14:08:25.70 10.0 undecidable manual PG 305 0.3219 0.08 1.9
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, /tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download