Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 28-07-2011 and time 21:20:42 (Italy) in region 3 km S Monterosso Grana (CN)

A magnitude ML 2.0 earthquake occured in region: 3 km S Monterosso Grana (CN), on

  • 28-07-2011 19:20:42 (UTC)
  • 28-07-2011 21:20:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.3870, 7.3320 at 12 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
Monterosso Grana CN 3 505 505
Valgrana CN 5 786 1291
Pradleves CN 5 250 1541
Valloriate CN 6 109 1650
Montemale di Cuneo CN 7 241 1891
Rittana CN 7 109 2000
Bernezzo CN 8 4104 6104
Demonte CN 8 2003 8107
Gaiola CN 8 582 8689
Caraglio CN 9 6836 15525
Moiola CN 9 234 15759
Dronero CN 9 7035 22794
Castelmagno CN 10 66 22860
Roccasparvera CN 10 741 23601
Roccabruna CN 10 1585 25186
Cartignano CN 11 190 25376
Cervasca CN 11 5013 30389
Vignolo CN 11 2600 32989
Villar San Costanzo CN 12 1547 34536
Aisone CN 12 248 34784
San Damiano Macra CN 13 430 35214
Valdieri CN 13 935 36149
Borgo San Dalmazzo CN 14 12468 48617
Roccavione CN 14 2761 51378
Vinadio CN 15 644 52022
Celle di Macra CN 16 100 52122
Roaschia CN 16 107 52229
Entracque CN 17 774 53003
Cuneo CN 18 56081 109084
Macra CN 18 59 109143
Robilante CN 18 2306 111449
Valmala CN 18 52 111501
Busca CN 18 10181 121682
Boves CN 19 9835 131517
Rossana CN 19 908 132425
Melle CN 20 292 132717

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km W of Cuneo (56081 inhabitants)
73 Km NW of Sanremo (54807 inhabitants)
74 Km SW of Moncalieri (57294 inhabitants)
81 Km SW of Torino (890529 inhabitants)
90 Km SW of Asti (76202 inhabitants)
92 Km W of Savona (61345 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
Bulletin
Rev1000 		Md 2.0
ML 2.0 		2011-07-28
19:20:42		 44.387 7.332 12 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1264789
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-07-28 19:20:42 ± 0.17
Latitude 44.3870 ± 0.0090
Longitude 7.3320 ± 0.0138
Depth (km) 12 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1264789

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1285
Semi-minor axis of confidence ellipse (meter) 81
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 228
Circular confidence region, given by single value of horizontal uncertainty (meter) 1486.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 150
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.45
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.62323
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 6
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 1264789
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 00:57:04

Md:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 1264789
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 00:57:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
.RORO.HHE. 2011-07-28T19:21:03.16 0.3 undecidable manual Sg 117 65.7897 0.33 85
.IMI.HHZ. 2011-07-28T19:21:03.63 0.3 undecidable manual Sg 140 69.1752 -0.091 88
.BHB.HHN. 2011-07-28T19:20:57.96 0.3 undecidable manual Sg 354 50.0166 -0.659 86
.IMI.HHZ. 2011-07-28T19:20:55.05 0.3 undecidable manual Pg 140 69.1752 0.168 90
.RORO.HHE. 2011-07-28T19:20:54.75 0.3 undecidable manual Pg 117 65.7897 0.389 85
.BHB.HHN. 2011-07-28T19:20:51.68 0.3 undecidable manual Pg 354 50.0166 -0.253 92
GU.PZZ.HHZ. 2011-07-28T19:20:50.89 0.3 undecidable manual Sg 308 21.6672 -0.173 93
IV.DOI.HHZ. 2011-07-28T19:20:49.47 0.3 undecidable manual Sg 333 14.6742 0.219 100
GU.ENR.HHZ. 2011-07-28T19:20:49.67 0.1 undecidable manual Sg 158 19.0698 -0.709 96
GU.PZZ.HHZ. 2011-07-28T19:20:47.63 0.3 undecidable manual Pg 308 21.6672 0.063 99
IV.DOI.HHZ. 2011-07-28T19:20:47.00 0.3 undecidable manual Pg 333 14.6742 0.478 93
GU.ENR.HHZ. 2011-07-28T19:20:47.07 0.3 undecidable manual Pg 158 19.0698 -0.105 94
IV.PZZT.HHZ. 2011-07-28T19:20:27.01 10.0 undecidable manual Pg 0 0 0
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
Waveforms Seismic signals in miniseed + resp format Download