Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 1.9 on date 20-10-1988 and time 10:58:17 (Italy) in region 1 km S Cairo Montenotte (SV)

A magnitude Md 1.9 earthquake occured in region: 1 km S Cairo Montenotte (SV), on

  • 20-10-1988 09:58:17 (UTC)
  • 20-10-1988 10:58:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.3950, 8.2740 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
Cairo Montenotte SV 1 13269 13269
Cosseria SV 4 1105 14374
Carcare SV 4 5587 19961
Plodio SV 5 650 20611
Cengio SV 5 3563 24174
Millesimo SV 6 3383 27557
Dego SV 7 1985 29542
Pallare SV 7 923 30465
Roccavignale SV 7 752 31217
Altare SV 9 2108 33325
Saliceto CN 9 1323 34648
Piana Crixia SV 11 788 35436
Montezemolo CN 11 259 35695
Camerana CN 11 631 36326
Gottasecca CN 11 148 36474
Giusvalla SV 11 441 36915
Mallare SV 12 1146 38061
Castelnuovo di Ceva CN 12 110 38171
Murialdo SV 12 841 39012
Castelletto Uzzone CN 13 331 39343
Bormida SV 13 387 39730
Osiglia SV 14 444 40174
Merana AL 14 189 40363
Pontinvrea SV 14 847 41210
Priero CN 15 529 41739
Prunetto CN 15 451 42190
Monesiglio CN 15 645 42835
Sale delle Langhe CN 15 486 43321
Mioglia SV 15 526 43847
Sale San Giovanni CN 16 183 44030
Quiliano SV 16 7232 51262
Pareto AL 16 554 51816
Perlo CN 17 116 51932
Paroldo CN 17 211 52143
Mombarcaro CN 17 268 52411
Gorzegno CN 17 304 52715
Pezzolo Valle Uzzone CN 17 344 53059
Spigno Monferrato AL 17 1050 54109
Stella SV 18 3009 57118
Serole AT 18 123 57241
Nucetto CN 18 430 57671
Levice CN 18 231 57902
Bergolo CN 19 71 57973
Ceva CN 19 5782 63755
Vado Ligure SV 19 8336 72091
Savona SV 19 61345 133436
Massimino SV 19 113 133549
Torresina CN 19 52 133601
Rialto SV 19 564 134165
Sassello SV 20 1777 135942
Vezzi Portio SV 20 809 136751
Albisola Superiore SV 20 10163 146914
Albissola Marina SV 20 5487 152401
Orco Feglino SV 20 890 153291
Mombaldone AT 20 209 153500

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km NW of Savona (61345 inhabitants)
52 Km W of Genova (586655 inhabitants)
56 Km S of Asti (76202 inhabitants)
57 Km E of Cuneo (56081 inhabitants)
64 Km SW of Alessandria (93943 inhabitants)
75 Km NE of Sanremo (54807 inhabitants)
82 Km SE of Moncalieri (57294 inhabitants)
89 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 1.9
M 2.4 		1988-10-20
09:58:17		 44.395 8.274 8 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 79369
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1988-10-20 09:58:17 ± 0.097
Latitude 44.3950 ± 0.0034
Longitude 8.2740 ± 0.0104
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 79369

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) 911.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 185
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00016
Epicentral distance of station farthest from the epicenter (degree) 0.00939
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:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 79369
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:14:40

M:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 79369
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
--.RSP.Z. 1988-10-20T09:58:38.33 10.0 undecidable manual PG 316 1.0434 -0.05 0.7
--.STV.Z. 1988-10-20T09:58:31.76 10.0 undecidable manual PG 258 0.6882 -0.04 1
--.ROB.Z. 1988-10-20T09:58:24.68 10.0 undecidable manual PG 252 0.2997 0.09 0.9
--.FIN.Z. 1988-10-20T09:58:22.22 10.0 undecidable manual PG 194 0.1887 -0.05 1.2
--.CKI.Z. 1988-10-20T09:58:20.50 10.0 undecidable manual SG 8 0.0222 -0.17 0.2
--.CKI.Z. 1988-10-20T09:58:19.50 10.0 positive manual PG 8 0.0222 0.08 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