Earthquake with magnitude of Md 3.2 on date 21-04-2002 and time 17:57:14 (UTC) in region 2 km NW Emarèse (AO)

A magnitude Md 3.2 earthquake occured in region: 2 km NW Emarèse (AO), on

  • 21-04-2002 17:57:14 (UTC)
  • 21-04-2002 19:57:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.7440, 7.6840 at 7 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Emarèse AO 3 226 226
Saint-Vincent AO 3 4660 4886
Brusson AO 4 897 5783
Montjovet AO 4 1801 7584
Challand-Saint-Anselme AO 5 751 8335
Châtillon AO 6 4772 13107
Challand-Saint-Victor AO 6 564 13671
Champdepraz AO 7 712 14383
Pontey AO 7 817 15200
Ayas AO 8 1401 16601
Verrès AO 8 2696 19297
La Magdeleine AO 9 109 19406
Antey-Saint-André AO 10 602 20008
Saint-Denis AO 10 378 20386
Issogne AO 10 1400 21786
Chambave AO 10 931 22717
Torgnon AO 11 558 23275
Arnad AO 11 1273 24548
Chamois AO 12 97 24645
Gressoney-Saint-Jean AO 12 807 25452
Verrayes AO 12 1302 26754
Champorcher AO 14 388 27142
Gressoney-La-Trinité AO 14 303 27445
Fénis AO 15 1813 29258
Issime AO 15 423 29681
Hône AO 15 1166 30847
Pontboset AO 15 185 31032
Valtournenche AO 16 2277 33309
Gaby AO 16 468 33777
Bard AO 16 119 33896
Nus AO 17 2984 36880
Donnas AO 17 2563 39443
Fontainemore AO 17 440 39883
Perloz AO 17 477 40360
Lillianes AO 18 462 40822
Saint-Marcel AO 18 1362 42184
Pont-Saint-Martin AO 18 3840 46024

Municipalities with at least 50000 inhabitants

An earthquake occurred to
75 Km N of Torino (890529 inhabitants)
80 Km W of Novara (104380 inhabitants)
83 Km N of Moncalieri (57294 inhabitants)
87 Km W of Gallarate (53343 inhabitants)
89 Km W of Varese (80799 inhabitants)
92 Km W of Busto Arsizio (83106 inhabitants)
97 Km W of Legnano (60262 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 3.2
ML-VAX 2.3
2002-04-21
17:57:14
45.744 7.684 7 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 439769
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2002-04-21 17:57:14 ± 0.429
Latitude 45.7440 ± 0.0234
Longitude 7.6840 ± 0.0319
Depth (km) 7 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 439769

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) 3589.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 178
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00210
Epicentral distance of station farthest from the epicenter (degree) 0.01797
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

Md:3.2

Field Value
Value 3.2
Uncertainty
Num. used stations 9
Type of magnitude Md
Reference to an origin 439769
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 23:55:38

ML:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 439769
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.IMI.Z. 2002-04-21T17:58:10.60 10.0 undecidable manual SN 175 0.0165 0.85 0.2
--.BRMO.Z. 2002-04-21T17:57:50.75 10.0 undecidable manual PN! 67 0.0180 2.52 0
--.BNI.Z. 2002-04-21T17:57:47.21 10.0 undecidable manual SG 226 0.0088 -1.19 0.3
--.IMI.Z. 2002-04-21T17:57:46.63 10.0 undecidable manual PN 175 0.0165 0.65 0.7
--.BOB.Z. 2002-04-21T17:57:44.18 10.0 undecidable manual PN 127 0.0142 1.76 0.2
--.FIN.Z. 2002-04-21T17:57:42.61 10.0 undecidable manual PN 166 0.0142 0.19 1.1
--.VAI.Z. 2002-04-21T17:57:41.22 10.0 undecidable manual SG 80 0.0069 -0.12 0.5
--.DOI.Z. 2002-04-21T17:57:36.56 10.0 positive manual PN 194 0.0115 -1.72 0.5
--.BNI.Z. 2002-04-21T17:57:34.48 10.0 negative manual PG 226 0.0088 0.52 2.1
--.VAI.Z. 2002-04-21T17:57:29.49 10.0 negative manual PG 80 0.0069 -0.4 2.5
--.MCGN.Z. 2002-04-21T17:57:25.15 10.0 undecidable manual SG 44 0.0027 -0.94 0.3
--.ORO.Z. 2002-04-21T17:57:22.97 10.0 undecidable manual SG 119 0.0021 -0.78 0.4
--.MCGN.Z. 2002-04-21T17:57:21.48 10.0 negative manual PG 44 0.0027 0.39 2.5
--.ORO.Z. 2002-04-21T17:57:19.82 10.0 positive manual PG 119 0.0021 0.09 2.7
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, http://terremoti.ingv.it/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