Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 3.7 on date 17-07-1993 and time 11:08:22 (UTC) in region 1 km SE Magliolo (SV)

A magnitude Md 3.7 earthquake occured in region: 1 km SE Magliolo (SV), on

  • 17-07-1993 11:08:22 (UTC)
  • 17-07-1993 13:08:22 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.1840, 8.2560 at 5 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
Magliolo SV 1 974 974
Tovo San Giacomo SV 1 2582 3556
Giustenice SV 1 977 4533
Calice Ligure SV 4 1730 6263
Pietra Ligure SV 4 8992 15255
Rialto SV 4 564 15819
Borgio Verezzi SV 5 2205 18024
Loano SV 6 11407 29431
Boissano SV 6 2492 31923
Orco Feglino SV 7 890 32813
Finale Ligure SV 7 11711 44524
Toirano SV 7 2644 47168
Borghetto Santo Spirito SV 8 4948 52116
Balestrino SV 9 595 52711
Ceriale SV 10 5561 58272
Vezzi Portio SV 10 809 59081
Bardineto SV 10 756 59837
Bormida SV 11 387 60224
Osiglia SV 12 444 60668
Calizzano SV 13 1475 62143
Mallare SV 13 1146 63289
Castelvecchio di Rocca Barbena SV 13 145 63434
Erli SV 13 245 63679
Noli SV 13 2736 66415
Zuccarello SV 14 309 66724
Cisano sul Neva SV 14 2085 68809
Spotorno SV 14 3803 72612
Albenga SV 15 24213 96825
Pallare SV 16 923 97748
Castelbianco SV 16 330 98078
Arnasco SV 17 645 98723
Murialdo SV 17 841 99564
Bergeggi SV 17 1129 100693
Vado Ligure SV 17 8336 109029
Quiliano SV 18 7232 116261
Villanova d'Albenga SV 18 2657 118918
Garessio CN 18 3244 122162
Altare SV 18 2108 124270
Vendone SV 19 388 124658
Plodio SV 19 650 125308
Ortovero SV 19 1586 126894
Massimino SV 20 113 127007
Nasino SV 20 207 127214
Carcare SV 20 5587 132801
Priola CN 20 701 133502

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SW of Savona (61345 inhabitants)
55 Km NE of Sanremo (54807 inhabitants)
60 Km W of Genova (586655 inhabitants)
61 Km E of Cuneo (56081 inhabitants)
80 Km S of Asti (76202 inhabitants)
86 Km SW of Alessandria (93943 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 3.7
M 3.7 		1993-07-17
11:08:22		 44.184 8.256 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 191349
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1993-07-17 11:08:22 ± 0.123
Latitude 44.1840 ± 0.0104
Longitude 8.2560 ± 0.0115
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 191349

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) 1473.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 62
Number of associated phases, regardless of their use for origin computation 95
Number of defining phases 95
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.00032
Epicentral distance of station farthest from the epicenter (degree) 0.06808
Number of stations at which the event was observed 71
Number of stations from which data was used for origin computation 71
Magnitudes information

Md:3.7

Field Value
Value 3.7
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 191349
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:59:46

M:3.7

Field Value
Value 3.7
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 191349
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
--.VBY.Z. 1993-07-17T11:10:36.69 10.0 undecidable manual SN 72 5.1171 0.24 0.4
--.BGF.Z. 1993-07-17T11:10:21.70 10.0 undecidable manual SN 303 4.4622 0.82 0.3
--.LOR.Z. 1993-07-17T11:10:20.10 10.0 undecidable manual SN! 316 4.3401 2.29 0
--.FLN.Z. 1993-07-17T11:10:14.60 10.0 undecidable manual PN 310 7.5369 1.49 0.2
--.GRR.Z. 1993-07-17T11:10:14.30 10.0 undecidable manual PN 307 7.5591 1.04 0.4
--.HAU.Z. 1993-07-17T11:10:11.10 10.0 undecidable manual SN 341 4.0293 0.57 0.4
--.SMF.Z. 1993-07-17T11:10:10.10 10.0 undecidable manual SN 310 3.9405 1.64 0.1
--.BSF.Z. 1993-07-17T11:10:05.00 10.0 undecidable manual SN 344 3.774 0.58 0.5
--.MFF.Z. 1993-07-17T11:09:59.00 10.0 undecidable manual PN 295 6.3603 2.14 0.1
--.KHC.Z. 1993-07-17T11:09:54.40 10.0 undecidable manual PN 34 6.1383 0.62 0.8
--.EPF.Z. 1993-07-17T11:09:50.40 10.0 undecidable manual PN 261 5.8275 0.8 0.7
--.CTI.Z. 1993-07-17T11:09:46.19 10.0 undecidable manual SN 50 3.0303 -0.36 0.6
--.LFF.Z. 1993-07-17T11:09:44.20 10.0 undecidable manual PN 280 5.3946 0.58 0.9
--.VBY.Z. 1993-07-17T11:09:40.00 10.0 undecidable manual PN 72 5.1171 0.13 1.1
--.LPO.Z. 1993-07-17T11:09:39.10 10.0 undecidable manual PN 278 5.0616 0.12 1.1
--.RJF.Z. 1993-07-17T11:09:38.00 10.0 undecidable manual PN 285 4.9062 1.15 0.5
--.TCF.Z. 1993-07-17T11:09:35.50 10.0 undecidable manual PN 298 4.7397 0.94 0.7
--.KBA.Z. 1993-07-17T11:09:33.60 10.0 positive manual PN 48 4.5732 1.25 1
--.BGF.Z. 1993-07-17T11:09:31.40 10.0 undecidable manual PN 303 4.4622 0.52 1.1
--.MAF.Z. 1993-07-17T11:09:31.70 10.0 undecidable manual PN 298 4.4844 0.6 1
--.CAF.Z. 1993-07-17T11:09:31.10 10.0 undecidable manual PN 281 4.4622 0.32 1.2
--.SSF.Z. 1993-07-17T11:09:30.50 10.0 undecidable manual PN 312 4.3845 0.79 0.9
--.VOY.Z. 1993-07-17T11:09:29.30 10.0 undecidable manual PN 63 4.3734 -0.3 1.2
--.AVF.Z. 1993-07-17T11:09:29.20 10.0 undecidable manual PN 308 4.3068 0.6 1
--.LOR.Z. 1993-07-17T11:09:29.60 10.0 undecidable manual PN 316 4.3401 0.49 1.1
--.RBL.Z. 1993-07-17T11:09:28.90 10.0 undecidable manual PN 56 4.3512 -0.39 1.1
--.CDF.Z. 1993-07-17T11:09:28.40 10.0 undecidable manual PN 351 4.2624 0.23 1.3
--.LBF.Z. 1993-07-17T11:09:26.60 10.0 undecidable manual PN 314 4.0848 0.94 0.8
--.SMF.Z. 1993-07-17T11:09:24.40 10.0 undecidable manual PN 310 3.9405 0.69 1
--.HAU.Z. 1993-07-17T11:09:24.80 10.0 undecidable manual PN 341 4.0293 -0.11 1.3
--.FVI.Z. 1993-07-17T11:09:24.47 10.0 undecidable manual PN 51 3.9849 0.33 1.3
--.GE9.Z. 1993-07-17T11:09:23.45 10.0 undecidable manual PN 56 4.0182 -1.21 0.5
--.BSF.Z. 1993-07-17T11:09:21.30 10.0 undecidable manual PN 344 3.774 -0.08 1.4
--.FEL.Z. 1993-07-17T11:09:20.37 10.0 undecidable manual PN 357 3.6852 0.26 1.4
--.SLE.Z. 1993-07-17T11:09:18.70 10.0 negative manual PN 2 3.5742 0.08 2.9
--.ZLA.Z. 1993-07-17T11:09:17.00 10.0 undecidable manual PN! 1 3.2856 2.32 0
--.ARV.Z. 1993-07-17T11:09:16.78 10.0 undecidable manual PN 99 3.441 0.03 1.5
--.LPL.Z. 1993-07-17T11:09:16.30 10.0 undecidable manual SN 321 1.7094 1.11 0.3
--.VAI.Z. 1993-07-17T11:09:15.00 10.0 undecidable manual SN 11 1.7205 -0.34 0.6
--.BDI.Z. 1993-07-17T11:09:15.50 10.0 undecidable manual SN 93 1.6761 1.03 0.4
--.LPG.Z. 1993-07-17T11:09:14.80 10.0 undecidable manual SN 321 1.6872 0.16 0.7
--.LRG.Z. 1993-07-17T11:09:11.30 10.0 undecidable manual SN 242 1.5429 0.05 0.7
--.CTI.Z. 1993-07-17T11:09:10.85 10.0 undecidable manual PN 50 3.0303 -0.21 1.5
--.OSS.Z. 1993-07-17T11:09:10.50 10.0 undecidable manual PN! 27 2.8194 2.22 0
--.LMR.Z. 1993-07-17T11:09:09.50 10.0 undecidable manual SN 236 1.5207 -1.06 0.3
--.ORO.Z. 1993-07-17T11:09:08.69 10.0 undecidable manual SN 352 1.443 -0.36 0.6
--.LLS.Z. 1993-07-17T11:09:07.70 10.0 undecidable manual PN 10 2.7084 1 0.9
--.CRE.Z. 1993-07-17T11:09:06.50 10.0 undecidable manual PN 100 2.7084 -0.26 1.6
--.BNI.Z. 1993-07-17T11:09:06.73 10.0 undecidable manual SN 308 1.4097 -1.42 0.2
--.FRF.Z. 1993-07-17T11:09:05.80 10.0 undecidable manual SN 242 1.3098 0.09 0.7
--.VDL.Z. 1993-07-17T11:09:04.80 10.0 positive manual PN 19 2.442 1.69 0.6
--.SFI.Z. 1993-07-17T11:09:04.87 10.0 undecidable manual PN 94 2.5863 -0.18 1.6
--.PGD.Z. 1993-07-17T11:09:02.82 10.0 undecidable manual PN 95 2.5086 -1.05 0.8
--.FIR.Z. 1993-07-17T11:08:59.00 10.0 undecidable manual PN 99 2.1978 -0.56 1.4
--.ZC9.Z. 1993-07-17T11:08:59.00 10.0 undecidable manual PN! 84 1.9536 2.74 0
--.SAL.Z. 1993-07-17T11:08:59.36 10.0 undecidable manual PN 47 2.1423 0.47 1.5
--.DIX.Z. 1993-07-17T11:08:57.10 10.0 undecidable manual PN 342 1.9758 0.4 1.5
--.TMA.Z. 1993-07-17T11:08:56.60 10.0 negative manual PN 12 1.9647 0.14 3.3
--.BOB.Z. 1993-07-17T11:08:56.94 10.0 undecidable manual SG 55 1.0212 -1.6 0.1
--.MMK.Z. 1993-07-17T11:08:55.10 10.0 undecidable manual PN 353 1.8648 -0.1 1.7
--.BDI.Z. 1993-07-17T11:08:54.00 10.0 undecidable manual PN 93 1.6761 1.46 0.5
--.LPL.Z. 1993-07-17T11:08:53.50 10.0 undecidable manual PN 321 1.7094 0.55 1.4
--.VAI.Z. 1993-07-17T11:08:53.60 10.0 undecidable manual PN 11 1.7205 0.01 1.7
--.LPG.Z. 1993-07-17T11:08:52.80 10.0 undecidable manual PN 321 1.6872 0.16 1.7
--.GU9.Z. 1993-07-17T11:08:52.52 10.0 undecidable manual PN 83 1.6761 0.07 1.7
--.PGF.Z. 1993-07-17T11:08:51.30 10.0 undecidable manual PN 161 1.7205 -1.75 0.3
--.LRG.Z. 1993-07-17T11:08:51.10 10.0 undecidable manual PN 242 1.5429 0.42 1.5
--.PII.Z. 1993-07-17T11:08:51.38 10.0 undecidable manual PN 104 1.6872 -1.32 0.5
--.LMR.Z. 1993-07-17T11:08:49.90 10.0 undecidable manual PN 236 1.5207 -0.39 1.5
--.BNI.Z. 1993-07-17T11:08:48.22 10.0 undecidable manual PN 308 1.4097 -0.67 1.2
--.LSD.Z. 1993-07-17T11:08:48.88 10.0 undecidable manual PN 328 1.4874 -1.04 0.8
--.NO1.Z. 1993-07-17T11:08:48.10 10.0 undecidable manual PN 11 1.2654 1.17 1.5
--.ORO.Z. 1993-07-17T11:08:48.90 10.0 undecidable manual PN 352 1.443 -0.51 1.4
--.FRF.Z. 1993-07-17T11:08:47.60 10.0 undecidable manual PN 242 1.3098 0.12 1.7
--.SBF.Z. 1993-07-17T11:08:46.60 10.0 undecidable manual SG 241 0.666 -0.39 0.6
--.RRL.Z. 1993-07-17T11:08:45.94 10.0 negative manual PN 305 1.2765 -1.06 1.6
--.STV.Z. 1993-07-17T11:08:44.80 10.0 undecidable manual SG 276 0.666 -2.05 0
--.RSP.Z. 1993-07-17T11:08:44.43 10.0 undecidable manual PN 324 1.1988 -1.46 0.4
--.ENR.Z. 1993-07-17T11:08:42.70 10.0 undecidable manual SG 274 0.5883 -2.01 0.1
--.BOB.Z. 1993-07-17T11:08:42.43 10.0 undecidable manual PG 55 1.0212 -0.91 0.9
--.BHB.Z. 1993-07-17T11:08:40.59 10.0 undecidable manual PG 312 0.9546 -1.45 0.4
--.PZZ.Z. 1993-07-17T11:08:39.42 10.0 negative manual PG 291 0.8769 -1.22 1.3
--.IMI.Z. 1993-07-17T11:08:37.40 10.0 undecidable manual SG 223 0.3663 0.19 0.6
--.DOI.Z. 1993-07-17T11:08:37.75 10.0 undecidable manual PG 294 0.777 -1.13 0.8
--.PCP.Z. 1993-07-17T11:08:36.10 10.0 undecidable manual SG! 29 0.3996 -2.47 0
--.SBF.Z. 1993-07-17T11:08:36.70 10.0 undecidable manual PG 241 0.666 0.03 1.7
--.STV.Z. 1993-07-17T11:08:35.84 10.0 undecidable manual PG 276 0.666 -0.75 1.2
--.ENR.Z. 1993-07-17T11:08:34.60 10.0 negative manual PG 274 0.5883 -0.76 2.4
--.ROB.Z. 1993-07-17T11:08:32.90 10.0 undecidable manual SG 293 0.2997 -1.31 0.2
--.IMI.Z. 1993-07-17T11:08:31.39 10.0 positive manual PG 223 0.3663 0.36 3
--.PCP.Z. 1993-07-17T11:08:30.52 10.0 positive manual PG 29 0.3996 -1.3 1
--.CKI.Z. 1993-07-17T11:08:30.25 10.0 undecidable manual SG 3 0.2331 -1.61 0.1
--.ROB.Z. 1993-07-17T11:08:29.20 10.0 negative manual PG 293 0.2997 -0.27 3.2
--.CKI.Z. 1993-07-17T11:08:27.44 10.0 positive manual PG 3 0.2331 -0.5 2.8
--.FIN.Z. 1993-07-17T11:08:25.31 10.0 undecidable manual PG 306 0.0333 1.37 0.5
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