Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.7 on date 13-07-1993 and time 12:58:32 (Italy) in region 3 km SW Bormida (SV)

A magnitude Md 2.7 earthquake occured in region: 3 km SW Bormida (SV), on

  • 13-07-1993 10:58:32 (UTC)
  • 13-07-1993 12:58:32 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2580, 8.2160 at 9 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
Bormida SV 3 387 387
Osiglia SV 3 444 831
Rialto SV 6 564 1395
Mallare SV 8 1146 2541
Magliolo SV 8 974 3515
Murialdo SV 8 841 4356
Calizzano SV 8 1475 5831
Calice Ligure SV 9 1730 7561
Pallare SV 9 923 8484
Orco Feglino SV 10 890 9374
Giustenice SV 10 977 10351
Tovo San Giacomo SV 10 2582 12933
Bardineto SV 10 756 13689
Plodio SV 11 650 14339
Roccavignale SV 12 752 15091
Millesimo SV 12 3383 18474
Vezzi Portio SV 12 809 19283
Massimino SV 12 113 19396
Cosseria SV 13 1105 20501
Castelnuovo di Ceva CN 13 110 20611
Carcare SV 13 5587 26198
Borgio Verezzi SV 13 2205 28403
Pietra Ligure SV 13 8992 37395
Altare SV 13 2108 39503
Perlo CN 13 116 39619
Boissano SV 14 2492 42111
Finale Ligure SV 14 11711 53822
Toirano SV 15 2644 56466
Cengio SV 15 3563 60029
Bagnasco CN 15 1035 61064
Loano SV 15 11407 72471
Montezemolo CN 15 259 72730
Balestrino SV 15 595 73325
Nucetto CN 15 430 73755
Priola CN 15 701 74456
Borghetto Santo Spirito SV 16 4948 79404
Erli SV 16 245 79649
Castelvecchio di Rocca Barbena SV 16 145 79794
Garessio CN 16 3244 83038
Quiliano SV 16 7232 90270
Priero CN 17 529 90799
Cairo Montenotte SV 17 13269 104068
Spotorno SV 17 3803 107871
Noli SV 17 2736 110607
Vado Ligure SV 18 8336 118943
Battifollo CN 18 219 119162
Saliceto CN 18 1323 120485
Ceriale SV 18 5561 126046
Zuccarello SV 18 309 126355
Bergeggi SV 18 1129 127484
Sale delle Langhe CN 19 486 127970
Sale San Giovanni CN 19 183 128153
Camerana CN 19 631 128784
Castelbianco SV 20 330 129114
Lisio CN 20 201 129315
Cisano sul Neva SV 20 2085 131400

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km W of Savona (61345 inhabitants)
55 Km E of Cuneo (56081 inhabitants)
59 Km NE of Sanremo (54807 inhabitants)
60 Km W of Genova (586655 inhabitants)
71 Km S of Asti (76202 inhabitants)
80 Km SW of Alessandria (93943 inhabitants)
93 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 2.7
M 2.6 		1993-07-13
10:58:32		 44.258 8.216 9 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 190729
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1993-07-13 10:58:32 ± 0.258
Latitude 44.2580 ± 0.0139
Longitude 8.2160 ± 0.0230
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 190729

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) 2396.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 145
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 35
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) 0.00040
Epicentral distance of station farthest from the epicenter (degree) 0.01473
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

Md:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 190729
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:59:07

M:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 190729
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
--.LPG.Z. 1993-07-13T10:59:24.00 10.0 undecidable manual SN 320 1.6095 2.2 0.1
--.LRG.Z. 1993-07-13T10:59:21.50 10.0 undecidable manual SN 239 1.554 1.01 0.4
--.LMR.Z. 1993-07-13T10:59:19.10 10.0 undecidable manual SN 233 1.5318 -0.89 0.3
--.FRF.Z. 1993-07-13T10:59:15.60 10.0 undecidable manual SN 238 1.3209 0.63 0.6
--.RRL.Z. 1993-07-13T10:59:11.30 10.0 undecidable manual SN 303 1.2099 -0.98 0.2
--.RSP.Z. 1993-07-13T10:59:09.10 10.0 undecidable manual SN 322 1.11 -0.99 0.2
--.LPG.Z. 1993-07-13T10:59:03.20 10.0 undecidable manual PN 320 1.6095 2.18 0.1
--.LPL.Z. 1993-07-13T10:59:03.80 10.0 undecidable manual PN 320 1.6317 2.47 0.1
--.BHB.Z. 1993-07-13T10:59:02.40 10.0 undecidable manual SG 310 0.8769 -0.89 0.4
--.LRG.Z. 1993-07-13T10:59:01.90 10.0 undecidable manual PN 239 1.554 1.64 0.4
--.PZZ.Z. 1993-07-13T10:59:00.50 10.0 undecidable manual SG 287 0.8214 -0.98 0.4
--.LMR.Z. 1993-07-13T10:58:59.80 10.0 undecidable manual PN 233 1.5318 -0.17 1.4
--.DOI.Z. 1993-07-13T10:58:58.86 10.0 undecidable manual SG 289 0.7326 0.52 0.7
--.FRF.Z. 1993-07-13T10:58:56.80 10.0 undecidable manual PN 238 1.3209 -0.27 1.4
--.SBF.Z. 1993-07-13T10:58:56.30 10.0 undecidable manual SG 235 0.6882 -0.45 0.7
--.RRL.Z. 1993-07-13T10:58:55.82 10.0 undecidable manual PN 303 1.2099 0.3 1.7
--.RSP.Z. 1993-07-13T10:58:54.13 10.0 undecidable manual PN 322 1.11 -0.13 1.6
--.STV.Z. 1993-07-13T10:58:54.10 10.0 undecidable manual SG 269 0.6327 -1 0.4
--.ENR.Z. 1993-07-13T10:58:52.00 10.0 undecidable manual SG 267 0.5661 -1.05 0.4
--.BHB.Z. 1993-07-13T10:58:50.48 10.0 undecidable manual PG 310 0.8769 0.15 2
--.PZZ.Z. 1993-07-13T10:58:49.33 10.0 undecidable manual PG 287 0.8214 0.05 2
--.IMI.Z. 1993-07-13T10:58:47.00 10.0 undecidable manual SG 213 0.4107 -1.15 0.3
--.DOI.Z. 1993-07-13T10:58:47.55 10.0 undecidable manual PG 289 0.7326 0.09 2.1
--.SBF.Z. 1993-07-13T10:58:46.90 10.0 undecidable manual PG 235 0.6882 0.34 2
--.PCP.Z. 1993-07-13T10:58:45.70 10.0 undecidable manual SG 39 0.3552 -0.84 0.2
--.STV.Z. 1993-07-13T10:58:45.96 10.0 undecidable manual PG 269 0.6327 0.36 2
--.ENR.Z. 1993-07-13T10:58:44.68 10.0 undecidable manual PG 267 0.5661 0.27 2
--.ROB.Z. 1993-07-13T10:58:42.10 10.0 undecidable manual SG 280 0.2442 -0.59 0.8
--.IMI.Z. 1993-07-13T10:58:41.10 10.0 undecidable manual PG 213 0.4107 -0.57 1.5
--.PCP.Z. 1993-07-13T10:58:40.32 10.0 undecidable manual PG 39 0.3552 -0.34 1.4
--.CKI.Z. 1993-07-13T10:58:39.15 10.0 undecidable manual SG 15 0.1665 -0.61 0.5
--.ROB.Z. 1993-07-13T10:58:38.59 10.0 undecidable manual PG 280 0.2442 0.16 2
--.CKI.Z. 1993-07-13T10:58:36.82 10.0 undecidable manual PG 15 0.1665 0.08 2
--.FIN.Z. 1993-07-13T10:58:35.90 10.0 undecidable manual SG 185 0.0444 -0.36 0.8
--.FIN.Z. 1993-07-13T10:58:34.93 10.0 undecidable manual PG 185 0.0444 0.21 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