Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 21-05-2012 and time 21:43:10 (UTC) in region Confine Italia Svizzera (SVIZZERA)

A magnitude ML 1.2 earthquake occured in region: Confine Italia Svizzera (SVIZZERA), on

  • 21-05-2012 21:43:10 (UTC)
  • 21-05-2012 23:43:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.4160, 9.9040 at 10 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
Lanzada SO 16 1341 1341
Caspoggio SO 17 1411 2752
Chiesa in Valmalenco SO 17 2514 5266

Municipalities with at least 50000 inhabitants

An earthquake occurred to
82 Km N of Bergamo (119381 inhabitants)
92 Km NE of Como (84495 inhabitants)
100 Km N of Brescia (196480 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
Reviewed
Rev100 		ML 1.3 2012-05-21
21:43:10		 46.4128 9.8932 10 2014-10-21
12:19:34		 Sala Sismica INGV-Roma 1351631
Bulletin
Rev1000 		ML 1.2 2012-05-21
21:43:10		 46.4158 9.9038 10 2014-09-19
08:14:18		 Bollettino Sismico Italiano INGV 2668571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2012-05-21 21:43:10 ± 0.39
Latitude 46.4158 ± 0.0081
Longitude 9.9038 ± 0.0078
Depth (km) 10 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 2668571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 887
Semi-minor axis of confidence ellipse (meter) 191
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 358
Circular confidence region, given by single value of horizontal uncertainty (meter) 890.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 131
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) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.32106
Epicentral distance of station farthest from the epicenter (degree) 0.85526
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 3
Type of magnitude ML
Reference to an origin 2668571
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2014-09-18 12:42:02

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 0
Type of magnitude ML
Reference to an origin 1351631
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2012-05-21 21:50:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CH.FUSIO.HHZ. 2012-05-21T21:43:38.34 0.1 undecidable manual S 273 94.9383 50 -0.21 88
IV.MAGA.HHZ. 2012-05-21T21:43:37.67 0.3 undecidable manual S 142 90.3429 50 0.35 65
SI.MOSI.HHZ. 2012-05-21T21:43:27.93 0.1 undecidable manual S 65 54.1014 50 0.28 94
IV.MAGA.HHZ. 2012-05-21T21:43:26.16 0.1 undecidable manual P 142 90.3429 50 0.2 89
CH.FUSIO.HHZ. 2012-05-21T21:43:26.92 0.1 undecidable manual P 273 94.9383 50 0.25 87
CH.DAVOX.HHZ. 2012-05-21T21:43:24.21 0.1 undecidable manual S 357 40.5261 50 0.19 98
MN.TUE.HHZ. 2012-05-21T21:43:24.75 0.1 undecidable manual S 279 43.0236 50 0.06 100
IV.BRMO.HHZ. 2012-05-21T21:43:22.16 0.3 undecidable manual S 79 36.4413 50 -0.79 61
CH.FUORN.HHZ. 2012-05-21T21:43:22.63 0.3 undecidable manual S 50 35.6421 50 -0.08 76
SI.MOSI.HHZ. 2012-05-21T21:43:20.75 0.6 positive manual P 65 54.1014 50 0.38 46
MN.TUE.HHZ. 2012-05-21T21:43:18.25 0.1 negative manual P 279 43.0236 50 -0.41 93
CH.DAVOX.HHZ. 2012-05-21T21:43:18.49 0.1 undecidable manual P 357 40.5261 50 0.21 97
IV.BRMO.HHZ. 2012-05-21T21:43:17.26 0.1 undecidable manual P 79 36.4413 50 -0.4 94
CH.FUORN.HHZ. 2012-05-21T21:43:17.53 0.6 negative manual P 50 35.6421 50 0 51
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BRMO.HHE. ML:1.3 0.00007825 0.18 AML other m 2012-05-21T21:43:22.30
IV.BRMO.HHN. ML:1.0 0.00004185 0.18 AML other m 2012-05-21T21:43:22.62
SI.MOSI.HHE. ML:1.4 0.00006259999999999999 0.7 AML other m 2012-05-21T21:43:30.43
SI.MOSI.HHN. ML:1.6 0.00009245000000000001 1.58 AML other m 2012-05-21T21:43:32.16
MN.TUE.HHN. ML:1.1 0.000042550000000000004 1.46 AML other m 2012-05-21T21:43:25.18
MN.TUE.HHE. ML:0.9 0.0000235 1.58 AML other m 2012-05-21T21:43:27.00
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download