Earthquake with magnitude of ML 0.7 on date 24-11-2021 and time 17:34:19 (UTC) in region 8 km NE Valtournenche (AO)

A magnitude ML 0.7 earthquake occured in region: 8 km NE Valtournenche (AO), on

  • 24-11-2021 17:34:19 (UTC)
  • 24-11-2021 18:34:19 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 45.921, 7.713 at 6 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
Valtournenche AO 8 2277 2277
Chamois AO 12 97 2374
Ayas AO 12 1401 3775
Gressoney-La-Trinité AO 13 303 4078
La Magdeleine AO 14 109 4187
Antey-Saint-André AO 16 602 4789
Torgnon AO 17 558 5347
Brusson AO 18 897 6244
Gressoney-Saint-Jean AO 18 807 7051
Alagna Valsesia VC 19 408 7459
Saint-Vincent AO 20 4660 12119

Municipalities with at least 50000 inhabitants

An earthquake occurred to
87 Km W of Varese (80799 inhabitants)
88 Km NW of Novara (104380 inhabitants)
89 Km W of Gallarate (53343 inhabitants)
94 Km N of Torino (890529 inhabitants)
95 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.7 2021-11-24
17:34:19
45.9207 7.7133 6 2021-11-24
17:41:02
Sala Sismica INGV-Roma 97757421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-24 17:34:19 ± 0.13
Latitude 45.9207 ± 0.0072
Longitude 7.7133 ± 0.0129
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97757421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1001
Semi-minor axis of confidence ellipse (meter) 615
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 315
Circular confidence region, given by single value of horizontal uncertainty (meter) 1000
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 124
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.21674
Epicentral distance of station farthest from the epicenter (degree) 0.61334
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.5
Num. used stations 11
Type of magnitude ML
Reference to an origin 97757421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-24 17:41:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.LSD.HHZ. 2021-11-24T17:34:41.35 0.3 undecidable manual S 221 0.6133 50 -0.1 72
GU.TRAV.HHZ. 2021-11-24T17:34:35.21 0.3 undecidable manual S 177 0.4092 50 -0.18 74
GU.LSD.HHZ. 2021-11-24T17:34:32.50 0.6 undecidable manual P 221 0.6133 50 0.22 47
GU.CIRO.HHZ. 2021-11-24T17:34:32.59 0.3 undecidable manual S 198 0.3345 100 -0.22 74
IV.MRGE.HHZ. 2021-11-24T17:34:29.93 0.1 undecidable manual P 252 0.4784 50 -0.05 100
GU.TRAV.HHZ. 2021-11-24T17:34:28.95 0.1 undecidable manual P 177 0.4092 50 0.17 99
CH.MMK.HHZ. 2021-11-24T17:34:27.94 0.3 undecidable manual S 53 0.2167 105 -0.45 73
GU.CIRO.HHZ. 2021-11-24T17:34:27.47 0.1 undecidable manual P 198 0.3345 100 0.18 100
CH.MMK.HHZ. 2021-11-24T17:34:25.27 0.3 negative manual P 53 0.2167 105 0.53 71
CH.DIX.HHZ. 2021-11-24T17:34:25.59 0.6 positive manual P 307 0.2653 102 -0.19 51
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
CH.DIX.HHN. ML:1.7 0.00023705365 0.1408 AML other m 2021-11-24T17:34:28.94
CH.DIX.HHE. ML:1.6 0.00018014605 0.1792 AML other m 2021-11-24T17:34:29.33
CH.MMK.HHE. ML:-0.1 3.787227E-6 0.1408 AML other m 2021-11-24T17:34:28.03
CH.MMK.HHN. ML:0.2 9.0977535E-6 0.0896 AML other m 2021-11-24T17:34:28.05
GU.CIRO.HHE. ML:0.1 6.8529625E-6 0.0768 AML other m 2021-11-24T17:34:33.22
GU.CIRO.HHN. ML:0.1 5.9877305E-6 0.1664 AML other m 2021-11-24T17:34:32.77
GU.TRAV.HHE. ML:0.5 8.0158365E-6 0.1408 AML other m 2021-11-24T17:34:37.09
GU.TRAV.HHN. ML:0.5 9.416085E-6 0.0768 AML other m 2021-11-24T17:34:35.24
IV.MRGE.HHE. ML:0 1.847681E-6 45.5168 AML other m 2021-11-24T17:34:29.36
IV.MRGE.HHN. ML:0.9 2.1161435E-5 0.8448 AML other m 2021-11-24T17:34:47.03
GU.LSD.HHE. ML:1.2 2.372139E-5 1.4848 AML other m 2021-11-24T17:34:55.97
GU.LSD.HHN. ML:1.2 2.819705E-5 1.8048 AML other m 2021-11-24T17:34:58.75
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