Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.6 on date 23-04-1994 and time 14:27:18 (Italy) in region 3 km S Sant'Anna d'Alfaedo (VR)

A magnitude Md 2.6 earthquake occured in region: 3 km S Sant'Anna d'Alfaedo (VR), on

  • 23-04-1994 12:27:18 (UTC)
  • 23-04-1994 14:27:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.6030, 10.9560 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
Sant'Anna d'Alfaedo VR 3 2553 2553
Erbezzo VR 6 740 3293
Marano di Valpolicella VR 6 3175 6468
Bosco Chiesanuova VR 6 3600 10068
Cerro Veronese VR 7 2471 12539
Brentino Belluno VR 8 1395 13934
Dolcè VR 8 2625 16559
Negrar VR 8 17119 33678
Fumane VR 9 4119 37797
Roverè Veronese VR 9 2115 39912
Grezzana VR 10 10788 50700
San Pietro in Cariano VR 11 12897 63597
Velo Veronese VR 11 770 64367
Ferrara di Monte Baldo VR 11 226 64593
Rivoli Veronese VR 12 2180 66773
Caprino Veronese VR 13 8371 75144
Sant'Ambrogio di Valpolicella VR 13 11737 86881
San Mauro di Saline VR 13 582 87463
Selva di Progno VR 14 933 88396
Avio TN 15 4133 92529
Pescantina VR 15 17128 109657
Affi VR 15 2336 111993
Cavaion Veronese VR 16 5849 117842
Badia Calavena VR 16 2649 120491
Bussolengo VR 17 19938 140429
Costermano sul Garda VR 17 3738 144167
Pastrengo VR 17 3092 147259
Ala TN 18 8913 156172
San Zeno di Montagna VR 18 1355 157527
Verona VR 18 258765 416292
Brenzone sul Garda VR 19 2474 418766
Tregnago VR 19 4938 423704
Mezzane di Sotto VR 19 2519 426223
Bardolino VR 19 7049 433272
Garda VR 20 4092 437364

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km N of Verona (258765 inhabitants)
46 Km W of Vicenza (112953 inhabitants)
54 Km S of Trento (117317 inhabitants)
58 Km E of Brescia (196480 inhabitants)
75 Km W of Padova (210401 inhabitants)
88 Km NW of Rovigo (51867 inhabitants)
90 Km NE of Cremona (71901 inhabitants)
91 Km N of Carpi (70699 inhabitants)
100 Km NW of Ferrara (133155 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 2.6
M 2.9 		1994-04-23
12:27:18		 45.603 10.956 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 208389
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1994-04-23 12:27:18 ± 0.17
Latitude 45.6030 ± 0.0153
Longitude 10.9560 ± 0.0201
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 208389

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) 2315.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 90
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
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) 0.00267
Epicentral distance of station farthest from the epicenter (degree) 0.02007
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

Md:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 208389
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 20:16:20

M:2.9

Field Value
Value 2.9
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 208389
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:19:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.GE9.Z. 1994-04-23T12:28:10.00 10.0 undecidable manual SN 64 1.6539 0.45 0.6
--.FVI.Z. 1994-04-23T12:28:08.34 10.0 undecidable manual SN 50 1.5984 0.08 0.7
--.BDI.Z. 1994-04-23T12:28:07.69 10.0 undecidable manual SN 189 1.554 0.53 0.6
--.BOB.Z. 1994-04-23T12:28:02.91 10.0 undecidable manual SN 232 1.3431 0.71 0.6
--.GU9.Z. 1994-04-23T12:28:00.48 10.0 undecidable manual SN 191 1.2765 0.03 0.8
--.VVI.Z. 1994-04-23T12:27:55.54 10.0 undecidable manual SN 68 1.0878 -0.53 0.6
--.CKI.Z. 1994-04-23T12:27:55.18 10.0 undecidable manual PN 238 2.2311 -0.5 1.3
--.CRE.Z. 1994-04-23T12:27:54.80 10.0 undecidable manual PN 159 2.0979 0.13 1.5
--.LLS.Z. 1994-04-23T12:27:53.00 10.0 undecidable manual PN! 313 1.8204 2.76 0
--.PII.Z. 1994-04-23T12:27:50.40 10.0 undecidable manual PN 189 1.8981 -0.82 1.1
--.MDI.Z. 1994-04-23T12:27:48.00 10.0 undecidable manual SG 281 0.8769 -1.55 0.2
--.FVI.Z. 1994-04-23T12:27:48.61 10.0 undecidable manual PN 50 1.5984 1.5 0.5
--.GE9.Z. 1994-04-23T12:27:47.00 10.0 undecidable manual PN 64 1.6539 -0.86 1.1
--.TMA.Z. 1994-04-23T12:27:47.60 10.0 positive manual PN 289 1.5318 1.47 1
--.BDI.Z. 1994-04-23T12:27:46.96 10.0 undecidable manual PN 189 1.554 0.48 1.6
--.VDL.Z. 1994-04-23T12:27:44.40 10.0 undecidable manual PN 310 1.3431 0.7 1.4
--.ZC9.Z. 1994-04-23T12:27:43.44 10.0 undecidable manual PN 178 1.2432 1.22 0.8
--.BOB.Z. 1994-04-23T12:27:43.15 10.0 undecidable manual PN 232 1.3431 -0.46 1.7
--.OSS.Z. 1994-04-23T12:27:42.10 10.0 undecidable manual PN 332 1.2099 0.28 1.9
--.GU9.Z. 1994-04-23T12:27:41.74 10.0 undecidable manual PN 191 1.2765 -0.87 1.2
--.CTI.Z. 1994-04-23T12:27:41.46 10.0 undecidable manual SG 46 0.6549 -0.72 0.6
--.VVI.Z. 1994-04-23T12:27:39.44 10.0 undecidable manual PN 68 1.0878 -0.63 1.5
--.MDI.Z. 1994-04-23T12:27:34.70 10.0 undecidable manual PG 281 0.8769 -1.61 0.4
--.CTI.Z. 1994-04-23T12:27:31.50 10.0 undecidable manual PG 46 0.6549 -0.55 1.6
--.SAL.Z. 1994-04-23T12:27:24.59 10.0 undecidable manual PG 270 0.2997 -0.39 1.8
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