Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.3 on date 08-08-1986 and time 14:44:24 (UTC) in region 2 km W Calizzano (SV)

A magnitude Md 2.3 earthquake occured in region: 2 km W Calizzano (SV), on

  • 08-08-1986 14:44:24 (UTC)
  • 08-08-1986 16:44:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2400, 8.0930 at 6 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
Calizzano SV 2 1475 1475
Priola CN 6 701 2176
Bardineto SV 6 756 2932
Garessio CN 7 3244 6176
Massimino SV 7 113 6289
Bagnasco CN 8 1035 7324
Osiglia SV 10 444 7768
Murialdo SV 10 841 8609
Perlo CN 11 116 8725
Battifollo CN 11 219 8944
Erli SV 11 245 9189
Viola CN 12 391 9580
Nucetto CN 12 430 10010
Lisio CN 12 201 10211
Bormida SV 12 387 10598
Castelvecchio di Rocca Barbena SV 12 145 10743
Castelnuovo di Ceva CN 13 110 10853
Scagnello CN 13 194 11047
Magliolo SV 14 974 12021
Castelbianco SV 14 330 12351
Balestrino SV 14 595 12946
Zuccarello SV 14 309 13255
Giustenice SV 14 977 14232
Rialto SV 15 564 14796
Nasino SV 15 207 15003
Pamparato CN 15 302 15305
Priero CN 15 529 15834
Toirano SV 16 2644 18478
Boissano SV 16 2492 20970
Tovo San Giacomo SV 16 2582 23552
Monasterolo Casotto CN 16 89 23641
Roccavignale SV 16 752 24393
Montezemolo CN 16 259 24652
Alto CN 16 128 24780
Calice Ligure SV 17 1730 26510
Millesimo SV 17 3383 29893
Mombasiglio CN 17 609 30502
Ceva CN 17 5782 36284
Cisano sul Neva SV 17 2085 38369
Mallare SV 17 1146 39515
Caprauna CN 18 104 39619
Pallare SV 18 923 40542
Ormea CN 18 1617 42159
Sale delle Langhe CN 18 486 42645
Roburent CN 18 495 43140
Plodio SV 18 650 43790
Sale San Giovanni CN 18 183 43973
Arnasco SV 18 645 44618
Loano SV 18 11407 56025
Borghetto Santo Spirito SV 18 4948 60973
Pietra Ligure SV 18 8992 69965
Cosseria SV 18 1105 71070
Vendone SV 18 388 71458
Aquila d'Arroscia IM 19 166 71624
Orco Feglino SV 19 890 72514
Cengio SV 19 3563 76077
Onzo SV 19 219 76296
Borgio Verezzi SV 19 2205 78501
Ceriale SV 19 5561 84062
Torre Mondovì CN 20 498 84560

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km W of Savona (61345 inhabitants)
46 Km E of Cuneo (56081 inhabitants)
53 Km NE of Sanremo (54807 inhabitants)
70 Km W of Genova (586655 inhabitants)
74 Km S of Asti (76202 inhabitants)
86 Km SW of Alessandria (93943 inhabitants)
91 Km SE of Moncalieri (57294 inhabitants)
98 Km SE of Torino (890529 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 2.3
M 2.4 		1986-08-08
14:44:24		 44.24 8.093 6 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 32489
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-08-08 14:44:24 ± 0.246
Latitude 44.2400 ± 0.0167
Longitude 8.0930 ± 0.0157
Depth (km) 6 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 32489

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) 2242.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 104
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
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) 0.00073
Epicentral distance of station farthest from the epicenter (degree) 0.00486
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 32489
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:33:19

M:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 32489
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
--.STV.Z. 1986-08-08T14:44:44.50 10.0 undecidable manual SG 271 0.5439 -0.23 0.4
--.STV.Z. 1986-08-08T14:44:36.00 10.0 undecidable manual PG 271 0.5439 -0.23 0.9
--.IMP.Z. 1986-08-08T14:44:33.20 10.0 undecidable manual PG 204 0.3552 0.64 0.6
--.CKI.Z. 1986-08-08T14:44:32.50 10.0 undecidable manual SG 36 0.2109 -0.98 0.2
--.ROB.Z. 1986-08-08T14:44:32.00 10.0 undecidable manual SG 291 0.1665 0.53 0.6
--.CKI.Z. 1986-08-08T14:44:30.50 10.0 negative manual PG 36 0.2109 0.78 1.1
--.ROB.Z. 1986-08-08T14:44:28.20 10.0 undecidable manual PG 291 0.1665 -0.37 2.3
--.FIN.Z. 1986-08-08T14:44:28.70 10.0 undecidable manual SG 111 0.0777 0.01 0.9
--.FIN.Z. 1986-08-08T14:44:26.50 10.0 undecidable manual PG 111 0.0777 -0.46 2.1
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