Earthquake with magnitude of Md 3.1 on date 04-02-2003 and time 20:49:42 (UTC) in region Confine Italia Svizzera (SVIZZERA)

A magnitude Md 3.1 earthquake occured in region: Confine Italia Svizzera (SVIZZERA), on

  • 04-02-2003 20:49:42 (UTC)
  • 04-02-2003 21:49:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 45.95, 7.78 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Gressoney-La-Trinité AO 14 303 303
Macugnaga VB 14 557 860
Valtournenche AO 15 2277 3137
Alagna Valsesia VC 16 408 3545
Ayas AO 16 1401 4946
Chamois AO 17 97 5043
Riva Valdobbia VC 18 258 5301
Gressoney-Saint-Jean AO 19 807 6108
La Magdeleine AO 20 109 6217

Municipalities with at least 50000 inhabitants

An earthquake occurred to
82 Km W of Varese (80799 inhabitants)
85 Km W of Gallarate (53343 inhabitants)
86 Km NW of Novara (104380 inhabitants)
91 Km W of Busto Arsizio (83106 inhabitants)
96 Km W of Legnano (60262 inhabitants)
97 Km N of Torino (890529 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 1000 Md 3.1
ML-MEDNET 3.2
2003-02-04
20:49:42
45.95 7.79 5 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 469369
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2003-02-04 20:49:42 ± 0.774
Latitude 45.95 ± 0.03
Longitude 7.79 ± 0.05
Depth (km) 5 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 469369

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) 5351.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 211
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00121
Epicentral distance of station farthest from the epicenter (degree) 0.03489
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 7
Type of magnitude Md
Reference to an origin 469369
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 00:25:02

ML:3.2

Field Value
Value 3.2
Uncertainty
Num. used stations
Type of magnitude ML
Reference to an origin 469369
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 10:38:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.PTCC.Z. 2003-02-04T20:50:41.77 10.0 undecidable manual PN 81 0.0349 -0.38 0.9
--.IMI.Z. 2003-02-04T20:50:41.88 10.0 undecidable manual SN 177 0.0183 -0.43 0.5
--.FVI.Z. 2003-02-04T20:50:37.38 10.0 undecidable manual PN 77 0.0316 0.3 1
--.BRMO.Z. 2003-02-04T20:50:37.91 10.0 undecidable manual SN 72 0.0168 -0.37 0.5
--.BOB.Z. 2003-02-04T20:50:34.18 10.0 undecidable manual SN 134 0.0149 0.83 0.5
--.CTI.Z. 2003-02-04T20:50:27.68 10.0 undecidable manual PN 86 0.0241 1.93 0.3
--.DOI.Z. 2003-02-04T20:50:27.19 10.0 undecidable manual SN 195 0.0134 -2.16 0.1
--.BNI.Z. 2003-02-04T20:50:22.10 10.0 undecidable manual SN 221 0.0106 0.08 0.6
--.IMI.Z. 2003-02-04T20:50:18.55 10.0 undecidable manual PN 177 0.0183 1.71 0.5
--.SAL.Z. 2003-02-04T20:50:16.87 10.0 undecidable manual PN 99 0.0174 1.34 0.8
--.BOB.Z. 2003-02-04T20:50:14.38 10.0 undecidable manual PN 134 0.0149 2.72 0.1
--.BRMO.Z. 2003-02-04T20:50:14.49 10.0 undecidable manual PN 72 0.0168 -0.02 1.4
--.FIN.Z. 2003-02-04T20:50:13.90 10.0 undecidable manual PN 170 0.0159 0.81 1.2
--.DOI.Z. 2003-02-04T20:50:08.80 10.0 positive manual PN 195 0.0134 -1.27 1.7
--.VAI.Z. 2003-02-04T20:50:04.68 10.0 undecidable manual SG 96 0.0062 -2.4 0.1
--.BNI.Z. 2003-02-04T20:50:04.54 10.0 negative manual PN 221 0.0106 -0.58 2.7
--.ORO.Z. 2003-02-04T20:49:55.93 10.0 undecidable manual SG 156 0.0031 0.42 0.6
--.VAI.Z. 2003-02-04T20:49:55.00 10.0 undecidable manual PG 96 0.0062 -1.49 0.7
--.ORO.Z. 2003-02-04T20:49:50.14 10.0 positive manual PG 156 0.0031 0.33 3
--.MCGN.Z. 2003-02-04T20:49:47.20 10.0 undecidable manual SG 85 0.0012 -0.72 0.6
--.MCGN.Z. 2003-02-04T20:49:45.15 10.0 positive manual PG 85 0.0012 -0.18 3.2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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