Earthquake with magnitude of ML 1.8 on date 16-07-2021 and time 01:02:18 (Italy) in region 11 km NE Bionaz (AO)

A magnitude ML 1.8 earthquake occured in region: 11 km NE Bionaz (AO), on

  • 15-07-2021 23:02:18 (UTC)
  • 16-07-2021 01:02:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.952, 7.511 at 10 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
Bionaz AO 11 236 236
Valtournenche AO 12 2277 2513
Oyace AO 15 219 2732
Chamois AO 15 97 2829
Torgnon AO 17 558 3387
Antey-Saint-André AO 18 602 3989
La Magdeleine AO 18 109 4098
Ollomont AO 19 157 4255
Valpelline AO 20 657 4912

Municipalities with at least 50000 inhabitants

An earthquake occurred to
99 Km N of Torino (890529 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 1.8 2021-07-15
23:02:18
45.9523 7.5113 10 2021-07-15
23:10:10
Sala Sismica INGV-Roma 92800491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-15 23:02:18 ± 0.24
Latitude 45.9523 ± 0.0144
Longitude 7.5113 ± 0.0168
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 92800491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1890
Semi-minor axis of confidence ellipse (meter) 840
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 326
Circular confidence region, given by single value of horizontal uncertainty (meter) 1890
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 177
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.44
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.12955
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 26
Type of magnitude ML
Reference to an origin 92800491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-15 23:10:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.NARO.HHZ. 2021-07-15T23:03:38.72 3.0 undecidable manual Pg 13.08 0
IV.ZONE.HHZ. 2021-07-15T23:03:17.54 3.0 undecidable manual Sn -0.16 0
IV.FIR.HHZ. 2021-07-15T23:03:10.21 3.0 undecidable manual Pn -3.57 0
GU.BHB.HHZ. 2021-07-15T23:02:55.37 0.6 undecidable manual S 189 1.1295 50 0.75 36
MN.BNI.HHZ. 2021-07-15T23:02:52.85 0.6 undecidable manual S 213 1.0729 50 -0.08 44
CH.MUGIO.HHZ. 2021-07-15T23:02:52.97 0.3 undecidable manual S 91 1.0639 50 0.3 63
GU.RSP.HHZ. 2021-07-15T23:02:46.25 0.6 undecidable manual S 192 0.822 50 0.75 38
IV.VARE.HHZ. 2021-07-15T23:02:46.88 0.6 undecidable manual S 95 0.8795 50 -0.32 44
GU.BHB.HHZ. 2021-07-15T23:02:40.42 0.6 undecidable manual P 189 1.1295 50 1.09 31
IV.MONC.HHZ. 2021-07-15T23:02:39.06 0.1 positive manual P 162 0.9254 50 3.23 4
MN.BNI.HHZ. 2021-07-15T23:02:39.33 0.3 negative manual P 213 1.0729 50 0.98 49
CH.MUGIO.HHZ. 2021-07-15T23:02:38.99 0.6 negative manual P 91 1.0639 50 0.79 36
GU.LSD.HHZ. 2021-07-15T23:02:37.20 0.6 undecidable manual S 208 0.5585 50 -0.49 45
CH.FUSIO.HHZ. 2021-07-15T23:02:36.76 0.3 positive manual P 57 0.9416 50 0.64 59
IV.VARE.HHZ. 2021-07-15T23:02:35.68 0.6 undecidable manual P 95 0.8795 50 0.63 40
GU.TRAV.HHZ. 2021-07-15T23:02:34.56 0.6 undecidable manual S 159 0.4694 50 -0.49 46
GU.RSP.HHZ. 2021-07-15T23:02:34.58 1.0 negative manual P 192 0.822 50 0.51 21
CH.MMK.HHZ. 2021-07-15T23:02:30.50 0.3 undecidable manual S 73 0.3292 50 -0.4 72
GU.CIRO.HHZ. 2021-07-15T23:02:30.67 0.6 undecidable manual S 174 0.3525 50 -0.92 39
IV.MRGE.HHZ. 2021-07-15T23:02:30.95 0.6 undecidable manual S 240 0.3624 50 -0.94 39
GU.LSD.HHZ. 2021-07-15T23:02:29.67 0.3 negative manual P 208 0.5585 50 0.11 73
GU.TRAV.HHZ. 2021-07-15T23:02:27.88 0.1 positive manual P 159 0.4694 50 -0.15 99
IV.MRGE.HHZ. 2021-07-15T23:02:26.02 0.1 negative manual P 240 0.3624 50 -0.19 100
GU.CIRO.HHZ. 2021-07-15T23:02:25.75 0.3 positive manual P 174 0.3525 50 -0.29 74
CH.MMK.HHZ. 2021-07-15T23:02:24.93 0.1 negative manual P 73 0.3292 50 -0.71 87
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.CIRO.HHE. ML:1.5 0.0001215 0.5 AML other m 2021-07-15T23:02:31.59
IV.MRGE.HHN. ML:2 0.000358 1.28 AML other m 2021-07-15T23:02:32.64
IV.MRGE.HHE. ML:1.9 0.000247 1.06 AML other m 2021-07-15T23:02:32.82
CH.MMK.HHN. ML:1 3.94E-5 0.82 AML other m 2021-07-15T23:02:33.11
GU.TRAV.HHN. ML:2 0.000248 0.16 AML other m 2021-07-15T23:02:34.95
GU.TRAV.HHE. ML:2 0.000261 0.22 AML other m 2021-07-15T23:02:34.88
CH.MMK.HHE. ML:0.9 3.15E-5 0.58 AML other m 2021-07-15T23:02:35.61
GU.CIRO.HHN. ML:1.6 0.0001245 0.86 AML other m 2021-07-15T23:02:36.72
GU.LSD.HHN. ML:1.7 9.765E-5 1.46 AML other m 2021-07-15T23:02:39.74
GU.LSD.HHE. ML:1.8 0.0001159 0.42 AML other m 2021-07-15T23:02:42.46
GU.RSP.HHN. ML:1.8 7.3E-5 0.52 AML other m 2021-07-15T23:02:46.40
GU.RSP.HHE. ML:1.9 9.545E-5 0.2 AML other m 2021-07-15T23:02:47.52
IV.VARE.HHN. ML:1.9 9.175E-5 0.66 AML other m 2021-07-15T23:02:49.69
IV.VARE.HHE. ML:1.8 6.605E-5 1.68 AML other m 2021-07-15T23:02:50.94
CH.FUSIO.HHN. ML:1.7 4.535E-5 0.4 AML other m 2021-07-15T23:02:53.78
MN.BNI.HHE. ML:1.4 1.975E-5 0.7 AML other m 2021-07-15T23:02:55.75
CH.MUGIO.HHE. ML:1.7 3.99E-5 0.44 AML other m 2021-07-15T23:02:55.66
CH.FUSIO.HHE. ML:1.6 3.99E-5 0.64 AML other m 2021-07-15T23:02:56.32
CH.MUGIO.HHN. ML:1.8 5.01E-5 0.94 AML other m 2021-07-15T23:02:56.74
IV.MONC.HHE. ML:2.2 0.00013285 0.92 AML other m 2021-07-15T23:02:56.83
MN.BNI.HHN. ML:1.5 2.385E-5 0.42 AML other m 2021-07-15T23:02:56.74
GU.BHB.HHN. ML:1.7 3.325E-5 1.2 AML other m 2021-07-15T23:02:57.05
IV.MONC.HHN. ML:2.1 0.00010795 1.58 AML other m 2021-07-15T23:02:57.11
GU.BHB.HHE. ML:1.7 3.65E-5 0.7 AML other m 2021-07-15T23:02:59.51
IV.ZONE.HHN. ML:2.1 4.01E-5 0.5 AML other m 2021-07-15T23:03:20.37
IV.ZONE.HHE. ML:2.1 3.325E-5 0.28 AML other m 2021-07-15T23:03:21.13
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