Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 3.0 on date 17-07-1993 and time 07:17:12 (UTC) in region 4 km S Osiglia (SV)

A magnitude Md 3.0 earthquake occured in region: 4 km S Osiglia (SV), on

  • 17-07-1993 07:17:12 (UTC)
  • 17-07-1993 09:17:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2470, 8.2080 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
Osiglia SV 4 444 444
Bormida SV 4 387 831
Rialto SV 6 564 1395
Magliolo SV 7 974 2369
Calizzano SV 7 1475 3844
Calice Ligure SV 8 1730 5574
Bardineto SV 9 756 6330
Murialdo SV 9 841 7171
Giustenice SV 9 977 8148
Mallare SV 9 1146 9294
Tovo San Giacomo SV 9 2582 11876
Orco Feglino SV 10 890 12766
Pallare SV 11 923 13689
Borgio Verezzi SV 12 2205 15894
Massimino SV 12 113 16007
Pietra Ligure SV 12 8992 24999
Vezzi Portio SV 13 809 25808
Boissano SV 13 2492 28300
Plodio SV 13 650 28950
Roccavignale SV 13 752 29702
Millesimo SV 13 3383 33085
Toirano SV 13 2644 35729
Castelnuovo di Ceva CN 13 110 35839
Loano SV 14 11407 47246
Balestrino SV 14 595 47841
Perlo CN 14 116 47957
Cosseria SV 14 1105 49062
Finale Ligure SV 14 11711 60773
Carcare SV 14 5587 66360
Bagnasco CN 15 1035 67395
Erli SV 15 245 67640
Altare SV 15 2108 69748
Priola CN 15 701 70449
Castelvecchio di Rocca Barbena SV 15 145 70594
Borghetto Santo Spirito SV 15 4948 75542
Garessio CN 15 3244 78786
Montezemolo CN 16 259 79045
Cengio SV 16 3563 82608
Nucetto CN 16 430 83038
Zuccarello SV 17 309 83347
Ceriale SV 17 5561 88908
Priero CN 17 529 89437
Quiliano SV 17 7232 96669
Spotorno SV 17 3803 100472
Noli SV 17 2736 103208
Battifollo CN 18 219 103427
Cairo Montenotte SV 18 13269 116696
Castelbianco SV 18 330 117026
Cisano sul Neva SV 18 2085 119111
Vado Ligure SV 18 8336 127447
Saliceto CN 19 1323 128770
Bergeggi SV 19 1129 129899
Lisio CN 19 201 130100
Sale delle Langhe CN 20 486 130586
Viola CN 20 391 130977
Sale San Giovanni CN 20 183 131160
Scagnello CN 20 194 131354

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km W of Savona (61345 inhabitants)
55 Km E of Cuneo (56081 inhabitants)
58 Km NE of Sanremo (54807 inhabitants)
61 Km W of Genova (586655 inhabitants)
73 Km S of Asti (76202 inhabitants)
81 Km SW of Alessandria (93943 inhabitants)
94 Km SE of Moncalieri (57294 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 3.0
M 3.0 		1993-07-17
07:17:12		 44.247 8.208 10 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 191249
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1993-07-17 07:17:12 ± 0.164
Latitude 44.2470 ± 0.0102
Longitude 8.2080 ± 0.0144
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 191249

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) 1613.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 40
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) 0.00032
Epicentral distance of station farthest from the epicenter (degree) 0.03966
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 22
Magnitudes information

Md:3.0

Field Value
Value 3.0
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 191249
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:59:39

M:3.0

Field Value
Value 3.0
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 191249
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. 1993-07-17T07:18:21.00 10.0 undecidable manual PN! 303 4.4067 2.18 0
--.LPG.Z. 1993-07-17T07:18:02.50 10.0 undecidable manual SN 320 1.6206 1.3 0.1
--.LRG.Z. 1993-07-17T07:17:59.50 10.0 undecidable manual SN 239 1.5429 -0.01 0.7
--.LMR.Z. 1993-07-17T07:17:58.60 10.0 undecidable manual SN 233 1.5207 -0.41 0.5
--.LSD.Z. 1993-07-17T07:17:56.70 10.0 undecidable manual SN 328 1.4097 0.25 0.6
--.FRF.Z. 1993-07-17T07:17:54.30 10.0 undecidable manual SN 239 1.3098 0.31 0.6
--.RRL.Z. 1993-07-17T07:17:51.30 10.0 undecidable manual SN 304 1.2099 -0.29 0.7
--.RSP.Z. 1993-07-17T07:17:48.90 10.0 undecidable manual SN 323 1.1211 -0.59 0.5
--.LPG.Z. 1993-07-17T07:17:42.60 10.0 undecidable manual PN! 320 1.6206 2.12 0
--.LPL.Z. 1993-07-17T07:17:42.90 10.0 undecidable manual PN! 321 1.6317 2.11 0
--.BHB.Z. 1993-07-17T07:17:41.60 10.0 undecidable manual SG 311 0.888 -1.14 0.1
--.LRG.Z. 1993-07-17T07:17:40.70 10.0 undecidable manual PN 239 1.5429 1.19 0.2
--.PZZ.Z. 1993-07-17T07:17:39.80 10.0 undecidable manual SG 288 0.8214 -0.98 0.2
--.LMR.Z. 1993-07-17T07:17:38.40 10.0 undecidable manual PN 233 1.5207 -0.82 0.6
--.LSD.Z. 1993-07-17T07:17:38.51 10.0 undecidable manual PN 328 1.4097 0.77 0.7
--.DOI.Z. 1993-07-17T07:17:37.92 10.0 undecidable manual SG 290 0.7326 0.27 0.8
--.BNI.Z. 1993-07-17T07:17:37.81 10.0 undecidable manual PN 307 1.3431 1.01 0.4
--.FRF.Z. 1993-07-17T07:17:36.70 10.0 undecidable manual PN 239 1.3098 0.38 1.5
--.RRL.Z. 1993-07-17T07:17:35.28 10.0 undecidable manual PN 304 1.2099 0.35 1.6
--.SBF.Z. 1993-07-17T07:17:35.80 10.0 undecidable manual SG 235 0.6771 0.04 0.9
--.STV.Z. 1993-07-17T07:17:33.70 10.0 undecidable manual SG 270 0.6216 -0.58 0.5
--.RSP.Z. 1993-07-17T07:17:33.65 10.0 undecidable manual PN 323 1.1211 -0.07 2
--.BOB.Z. 1993-07-17T07:17:32.41 10.0 undecidable manual PG 59 1.0101 0.12 2.1
--.ENR.Z. 1993-07-17T07:17:31.70 10.0 undecidable manual SG 268 0.555 -0.51 0.6
--.BHB.Z. 1993-07-17T07:17:29.81 10.0 undecidable manual PG 311 0.888 -0.02 2.1
--.PZZ.Z. 1993-07-17T07:17:28.64 10.0 undecidable manual PG 288 0.8214 -0.05 2.1
--.DOI.Z. 1993-07-17T07:17:27.20 10.0 undecidable manual PG 290 0.7326 0.14 2.1
--.IMI.Z. 1993-07-17T07:17:26.20 10.0 undecidable manual SG 213 0.3996 -0.92 0.2
--.STV.Z. 1993-07-17T07:17:25.38 10.0 undecidable manual PG 270 0.6216 0.44 1.6
--.SBF.Z. 1993-07-17T07:17:25.90 10.0 undecidable manual PG 235 0.6771 0.11 2.1
--.PCP.Z. 1993-07-17T07:17:24.80 10.0 undecidable manual SG 39 0.3774 -1.49 0
--.ENR.Z. 1993-07-17T07:17:22.95 10.0 undecidable manual PG 268 0.555 -0.79 0.8
--.ROB.Z. 1993-07-17T07:17:21.30 10.0 undecidable manual SG 282 0.2442 -0.69 0.4
--.IMI.Z. 1993-07-17T07:17:20.52 10.0 undecidable manual PG 213 0.3996 -0.29 1.9
--.PCP.Z. 1993-07-17T07:17:19.76 10.0 undecidable manual PG 39 0.3774 -0.57 1.3
--.CKI.Z. 1993-07-17T07:17:19.45 10.0 undecidable manual SG 16 0.1665 -0.42 0.7
--.ROB.Z. 1993-07-17T07:17:18.15 10.0 undecidable manual PG 282 0.2442 0.31 1.9
--.CKI.Z. 1993-07-17T07:17:16.71 10.0 positive manual PG 16 0.1665 0.09 4.2
--.FIN.Z. 1993-07-17T07:17:15.40 10.0 undecidable manual SG 178 0.0333 -0.55 0.5
--.FIN.Z. 1993-07-17T07:17:14.54 10.0 undecidable manual PG 178 0.0333 0.18 2
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