Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 04-10-2009 and time 22:29:46 (UTC) in region 4 km E Asti (AT)

A magnitude ML 2.0 earthquake occured in region: 4 km E Asti (AT), on

  • 04-10-2009 22:29:46 (UTC)
  • 05-10-2009 00:29:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.9140, 8.2530 at 28 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
Asti AT 4 76202 76202
Azzano d'Asti AT 4 391 76593
Portacomaro AT 5 2006 78599
Rocca d'Arazzo AT 5 936 79535
Scurzolengo AT 6 555 80090
Castello di Annone AT 6 1860 81950
Castagnole Monferrato AT 7 1245 83195
Refrancore AT 8 1591 84786
Mongardino AT 8 921 85707
Castell'Alfero AT 8 2763 88470
Vigliano d'Asti AT 9 835 89305
Montaldo Scarampi AT 9 755 90060
Rocchetta Tanaro AT 9 1450 91510
Revigliasco d'Asti AT 10 767 92277
Cerro Tanaro AT 10 626 92903
Montemagno AT 10 1153 94056
Montegrosso d'Asti AT 10 2344 96400
Grana AT 10 600 97000
Calliano AT 10 1317 98317
Isola d'Asti AT 11 2071 100388
Belveglio AT 11 350 100738
Mombercelli AT 11 2259 102997
Viarigi AT 11 929 103926
Celle Enomondo AT 12 484 104410
Frinco AT 12 768 105178
Antignano AT 12 974 106152
Quattordio AL 12 1637 107789
Settime AT 12 530 108319
Cossombrato AT 13 528 108847
Baldichieri d'Asti AT 13 1110 109957
Vinchio AT 13 601 110558
Corsione AT 13 218 110776
Cortiglione AT 13 571 111347
Masio AL 13 1420 112767
Chiusano d'Asti AT 13 220 112987
Altavilla Monferrato AL 13 468 113455
Tonco AT 13 866 114321
Penango AT 13 488 114809
Agliano Terme AT 14 1642 116451
Casorzo AT 14 633 117084
Cinaglio AT 14 446 117530
Villa San Secondo AT 14 395 117925
Castellero AT 14 302 118227
Castelnuovo Calcea AT 14 759 118986
Tigliole AT 14 1699 120685
Monale AT 14 984 121669
Felizzano AL 15 2344 124013
Vaglio Serra AT 15 275 124288
Grazzano Badoglio AT 15 615 124903
Fubine AL 15 1653 126556
Costigliole d'Asti AT 15 5914 132470
Camerano Casasco AT 15 471 132941
Montechiaro d'Asti AT 15 1276 134217
Alfiano Natta AL 15 744 134961
San Martino Alfieri AT 15 666 135627
Moncalvo AT 15 3033 138660
Incisa Scapaccino AT 16 2288 140948
Vignale Monferrato AL 16 1006 141954
Cortandone AT 16 329 142283
Olivola AL 17 122 142405
Soglio AT 17 145 142550
Cortazzone AT 17 654 143204
Frassinello Monferrato AL 17 502 143706
Ottiglio AL 17 629 144335
Moasca AT 17 494 144829
Govone CN 17 2203 147032
Cortanze AT 17 277 147309
San Damiano d'Asti AT 17 8315 155624
Villafranca d'Asti AT 17 3094 158718
Maretto AT 18 375 159093
Cantarana AT 18 982 160075
Nizza Monferrato AT 18 10429 170504
Castelnuovo Belbo AT 18 895 171399
Odalengo Piccolo AL 18 262 171661
San Marzano Oliveto AT 18 1047 172708
Castelletto Merli AL 18 476 173184
Cuccaro Monferrato AL 18 340 173524
Camagna Monferrato AL 18 528 174052
Roatto AT 18 400 174452
Viale AT 18 257 174709
Cunico AT 19 496 175205
Bergamasco AL 19 744 175949
Piea AT 19 583 176532
Villadeati AL 19 479 177011
Quargnento AL 19 1398 178409
Ponzano Monferrato AL 19 356 178765
Oviglio AL 19 1265 180030
Castagnole delle Lanze AT 19 3798 183828
Calosso AT 19 1279 185107
Carentino AL 20 340 185447
Montafia AT 20 937 186384
Sala Monferrato AL 20 352 186736
Cereseto AL 20 437 187173

Municipalities with at least 50000 inhabitants

An earthquake occurred to
4 Km E of Asti (76202 inhabitants)
29 Km W of Alessandria (93943 inhabitants)
46 Km E of Moncalieri (57294 inhabitants)
48 Km E of Torino (890529 inhabitants)
66 Km SW of Vigevano (63310 inhabitants)
66 Km SW of Novara (104380 inhabitants)
70 Km N of Savona (61345 inhabitants)
78 Km NW of Genova (586655 inhabitants)
78 Km W of Pavia (72576 inhabitants)
80 Km NE of Cuneo (56081 inhabitants)
91 Km SW of Busto Arsizio (83106 inhabitants)
92 Km SW of Legnano (60262 inhabitants)
92 Km SW of Rho (50434 inhabitants)
93 Km SW of Gallarate (53343 inhabitants)
96 Km SW of Milano (1345851 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 2.4
ML 2.0 		2009-10-04
22:29:46		 44.914 8.253 28 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 972959
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-10-04 22:29:46 ± 0.14
Latitude 44.9140 ± 0.0081
Longitude 8.2530 ± 0.0114
Depth (km) 28 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 972959

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 950
Semi-minor axis of confidence ellipse (meter) 345
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 70
Circular confidence region, given by single value of horizontal uncertainty (meter) 1272.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.54
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.19700
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 972959
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 18:36:09

Md:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 972959
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 18:36:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CDCA.EHE. 2009-10-04T22:30:39.77 10.0 undecidable manual Pg 0 0 0
MN.TUE.HHE. 2009-10-04T22:30:38.09 10.0 undecidable manual Pg 0 0 0
CH.FUSIO.HHE. 2009-10-04T22:30:36.40 10.0 undecidable manual Pg 0 0 0
CH.DIX.HHN. 2009-10-04T22:30:27.98 10.0 undecidable manual Pg 0 0 0
IV.MDI.HHE. 2009-10-04T22:30:27.78 10.0 undecidable manual Pg 0 0 0
IV.STR3.BHE. 2009-10-04T22:30:25.52 10.0 undecidable manual Pg 0 0 0
IV.DOI.HHE. 2009-10-04T22:30:14.82 0.1 undecidable manual Sg 241 91.4418 0.795 77
IV.ORO.SHZ. 2009-10-04T22:30:11.84 0.1 undecidable manual Sg 345 81.8514 0.329 93
GU.BHB.HHZ. 2009-10-04T22:30:11.02 0.6 undecidable manual Sg 264 78.2661 0.425 45
GU.FINB.HHZ. 2009-10-04T22:30:11.77 0.6 undecidable manual Sg 176 81.9513 0.233 46
GU.TRAV.HHZ. 2009-10-04T22:30:10.26 0.1 undecidable manual Sg 329 77.2671 -0.072 97
GU.RSP.HHZ. 2009-10-04T22:30:10.74 0.1 undecidable manual Sg 289 81.6516 -0.73 80
IV.MSSA.HHE. 2009-10-04T22:30:07.31 0.3 undecidable manual Pg 123 119.8911 0.557 61
IV.MRGE.HHE. 2009-10-04T22:30:07.92 0.3 undecidable manual Pg 316 132.867 -0.447 59
CH.MMK.HHE. 2009-10-04T22:30:07.23 0.6 undecidable manual Pg 350 128.1717 -0.559 38
CH.MUGIO.HHE. 2009-10-04T22:30:07.63 0.3 undecidable manual Pg 28 127.5723 -0.076 65
GU.SC2M.HHE. 2009-10-04T22:30:06.66 0.3 undecidable manual Pg 119 115.7952 0.482 62
IV.BOB.HHN. 2009-10-04T22:30:03.34 0.3 undecidable manual Pg 99 95.3379 0.278 68
GU.PZZ.HHZ. 2009-10-04T22:30:03.06 0.1 undecidable manual Pg 244 100.4217 -0.766 77
IV.DOI.HHE. 2009-10-04T22:30:02.75 0.1 undecidable manual Pg 241 91.4418 0.272 91
GU.RORO.HHN. 2009-10-04T22:30:02.43 0.1 undecidable manual Pg 190 90.243 0.142 94
GU.FINB.HHZ. 2009-10-04T22:30:01.13 0.1 undecidable manual Pg 176 81.9513 0.089 96
IV.ORO.SHZ. 2009-10-04T22:30:01.15 0.1 undecidable manual Pg 345 81.8514 0.12 97
GU.PCP.HHZ. 2009-10-04T22:30:01.94 0.1 undecidable manual Sg 151 47.3193 -0.822 86
GU.BHB.HHZ. 2009-10-04T22:30:00.53 0.1 undecidable manual Pg 264 78.2661 0.031 99
GU.TRAV.HHZ. 2009-10-04T22:30:00.46 0.1 undecidable manual Pg 329 77.2671 0.116 98
GU.RSP.HHZ. 2009-10-04T22:30:00.53 0.1 undecidable manual Pg 289 81.6516 -0.473 89
IV.QLNO.HHZ. 2009-10-04T22:29:58.54 0.1 undecidable manual Pg 174 65.8896 -0.112 100
IV.RMP.HHN. 2009-10-04T22:29:57.72 10.0 undecidable manual Pg 0 0 0
GU.PCP.HHZ. 2009-10-04T22:29:55.43 0.1 undecidable manual Pg 151 47.3193 -0.544 94
IV.MONC.HHZ. 2009-10-04T22:29:54.93 0.1 undecidable manual Pg 305 31.1466 1.129 75
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