Earthquake with magnitude of ML 1.2 on date 28-09-2021 and time 10:10:27 (Italy) in region 4 km N Champorcher (AO)

A magnitude ML 1.2 earthquake occured in region: 4 km N Champorcher (AO), on

  • 28-09-2021 08:10:27 (UTC)
  • 28-09-2021 10:10:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.656, 7.626 at 12 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Champorcher AO 4 388 388
Champdepraz AO 4 712 1100
Issogne AO 5 1400 2500
Verrès AO 5 2696 5196
Montjovet AO 7 1801 6997
Pontboset AO 7 185 7182
Challand-Saint-Victor AO 7 564 7746
Arnad AO 8 1273 9019
Pontey AO 10 817 9836
Emarèse AO 10 226 10062
Hône AO 10 1166 11228
Châtillon AO 11 4772 16000
Saint-Vincent AO 11 4660 20660
Bard AO 11 119 20779
Challand-Saint-Anselme AO 11 751 21530
Chambave AO 12 931 22461
Saint-Denis AO 12 378 22839
Donnas AO 13 2563 25402
Fénis AO 14 1813 27215
Verrayes AO 14 1302 28517
Brusson AO 14 897 29414
Pont-Saint-Martin AO 15 3840 33254
Perloz AO 15 477 33731
Nus AO 15 2984 36715
Valprato Soana TO 16 108 36823
Saint-Marcel AO 16 1362 38185
Carema TO 17 774 38959
Antey-Saint-André AO 17 602 39561
Torgnon AO 17 558 40119
La Magdeleine AO 17 109 40228
Lillianes AO 17 462 40690
Quincinetto TO 18 1031 41721
Issime AO 18 423 42144
Ayas AO 18 1401 43545
Ronco Canavese TO 18 314 43859
Fontainemore AO 18 440 44299
Quart AO 19 4039 48338
Brissogne AO 19 1008 49346
Traversella TO 19 343 49689
Tavagnasco TO 20 791 50480

Municipalities with at least 50000 inhabitants

An earthquake occurred to
65 Km N of Torino (890529 inhabitants)
73 Km N of Moncalieri (57294 inhabitants)
81 Km W of Novara (104380 inhabitants)
91 Km W of Gallarate (53343 inhabitants)
95 Km W of Varese (80799 inhabitants)
96 Km NW of Asti (76202 inhabitants)
96 Km W of Busto Arsizio (83106 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.2 2021-09-28
08:10:27
45.6565 7.626 12 2021-09-28
08:17:58
Sala Sismica INGV-Roma 95982591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-28 08:10:27 ± 0.14
Latitude 45.6565 ± 0.0063
Longitude 7.6260 ± 0.0154
Depth (km) 12 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95982591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1181
Semi-minor axis of confidence ellipse (meter) 199
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 270
Circular confidence region, given by single value of horizontal uncertainty (meter) 1180
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.56747
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.5
Num. used stations 20
Type of magnitude ML
Reference to an origin 95982591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-28 08:17:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VENL.EHZ. 2021-09-28T08:12:16.90 3.0 undecidable manual Sg 15.75 0
SI.ABSI.HHZ. 2021-09-28T08:12:01.32 3.0 undecidable manual Sg 14.22 0
MN.TRI.HHZ. 2021-09-28T08:11:53.42 3.0 positive manual Pg 20.18 0
IV.PE3.EHZ. 2021-09-28T08:11:39.30 3.0 negative manual Pg 10.34 0
IV.FDMO.HHZ. 2021-09-28T08:11:38.42 3.0 negative manual Pn -0.47 0
IV.MABI.HHZ. 2021-09-28T08:11:36.36 3.0 undecidable manual Sg 6.84 0
IV.BRSN.HNZ. 2021-09-28T08:11:23.30 3.0 negative manual Pn 1.8 0
IT.FIE.HGZ. 2021-09-28T08:11:18.78 3.0 negative manual Pn 0.64 0
GU.PCP.HHZ. 2021-09-28T08:10:51.38 3.0 undecidable manual P -0.46 0
CH.DIX.HHZ. 2021-09-28T08:10:42.25 0.6 undecidable manual S 340 0.4497 91 -0.69 40
GU.LSD.HHZ. 2021-09-28T08:10:41.30 0.6 undecidable manual S 240 0.3966 91 -0.07 49
GU.RSP.HHZ. 2021-09-28T08:10:38.31 0.1 undecidable manual P 207 0.5675 91 0.02 95
CH.DIX.HHZ. 2021-09-28T08:10:36.17 0.1 undecidable manual P 340 0.4497 91 -0.1 95
CH.MMK.HHE. 2021-09-28T08:10:36.53 0.1 undecidable manual P 31 0.4587 91 0.1 97
IV.MRGE.HHZ. 2021-09-28T08:10:36.15 0.1 undecidable manual P 286 0.4101 91 0.55 87
GU.LSD.HHZ. 2021-09-28T08:10:35.08 0.1 undecidable manual P 240 0.3966 91 -0.29 93
GU.TRAV.HHZ. 2021-09-28T08:10:34.14 0.6 undecidable manual S 150 0.1673 97 -0.43 47
GU.CIRO.HHZ. 2021-09-28T08:10:31.62 0.6 undecidable manual S 217 0.0674 136 -0.31 50
GU.TRAV.HHZ. 2021-09-28T08:10:31.64 0.1 positive manual P 150 0.1673 97 0.2 100
GU.CIRO.HHZ. 2021-09-28T08:10:30.16 0.1 undecidable manual P 217 0.0674 136 0.24 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.CIRO.HHN. ML:1 0.0001255 0.16 AML other m 2021-09-28T08:10:31.77
GU.CIRO.HHE. ML:0.9 9.953776E-5 0.16 AML other m 2021-09-28T08:10:32.27
GU.TRAV.HHN. ML:1.1 8.910725E-5 0.1792 AML other m 2021-09-28T08:10:34.51
GU.TRAV.HHE. ML:1.1 0.0001047 0.2 AML other m 2021-09-28T08:10:35.13
GU.LSD.HHN. ML:1 3.105E-5 0.14 AML other m 2021-09-28T08:10:42.25
GU.LSD.HHE. ML:1 3.02E-5 0.18 AML other m 2021-09-28T08:10:43.03
IV.MRGE.HHE. ML:0.7 1.71598E-5 0.1408 AML other m 2021-09-28T08:10:43.73
IV.MRGE.HHN. ML:0.7 1.49726825E-5 0.2432 AML other m 2021-09-28T08:10:44.23
CH.DIX.HHE. ML:1.1 3.54879825E-5 0.1472 AML other m 2021-09-28T08:10:47.28
CH.DIX.HHN. ML:1.1 3.0086415E-5 0.1792 AML other m 2021-09-28T08:10:46.08
GU.RSP.HNE. ML:1.1 2.42310955E-5 0.5632 AML other m 2021-09-28T08:10:45.95
GU.RSP.HNN. ML:1.1 2.3851455E-5 0.5504 AML other m 2021-09-28T08:10:56.80
GU.RSP.HHE. ML:1.1 2.5178295E-5 0.16 AML other m 2021-09-28T08:10:48.82
GU.RSP.HHN. ML:1 1.996878E-5 0.1792 AML other m 2021-09-28T08:10:48.35
GU.PCP.HHE. ML:1.4 1.4691949E-5 1.6 AML other m 2021-09-28T08:11:37.10
GU.PCP.HHN. ML:1.6 1.771758E-5 2.016 AML other m 2021-09-28T08:11:23.74
IV.BRSN.EHE. ML:3.9 0.0005622161 0.0576 AML other m 2021-09-28T08:11:27.05
IV.BRSN.EHN. ML:3.9 0.0004935539 0.16 AML other m 2021-09-28T08:11:27.51
IV.BRSN.HNE. ML:3.9 0.00059227275 0.0512 AML other m 2021-09-28T08:11:27.05
IV.BRSN.HNN. ML:3.9 0.0004922465 0.1728 AML other m 2021-09-28T08:11:27.51
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