Earthquake with magnitude of ML 1.1 on date 17-05-2020 and time 01:42:30 (Italy) in region Roisan (AO)

A magnitude ML 1.1 earthquake occured in region: Roisan (AO), on

  • 16-05-2020 23:42:30 (UTC)
  • 17-05-2020 01:42:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.79, 7.31 at 9 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
Roisan AO 0 1036 1036
Gignod AO 1 1710 2746
Doues AO 4 510 3256
Allein AO 4 229 3485
Valpelline AO 5 657 4142
Aosta AO 6 34390 38532
Saint-Christophe AO 6 3432 41964
Etroubles AO 7 501 42465
Ollomont AO 7 157 42622
Gressan AO 7 3387 46009
Charvensod AO 8 2468 48477
Pollein AO 8 1569 50046
Jovençan AO 8 736 50782
Saint-Oyen AO 9 203 50985
Sarre AO 9 4927 55912
Oyace AO 9 219 56131
Quart AO 10 4039 60170
Brissogne AO 10 1008 61178
Saint-Rhémy-en-Bosses AO 11 338 61516
Saint-Pierre AO 11 3165 64681
Aymavilles AO 11 2086 66767
Villeneuve AO 12 1289 68056
Saint-Marcel AO 12 1362 69418
Bionaz AO 13 236 69654
Saint-Nicolas AO 13 311 69965
Nus AO 13 2984 72949
Introd AO 14 658 73607
Arvier AO 14 873 74480
Avise AO 16 305 74785
Fénis AO 16 1813 76598
Verrayes AO 18 1302 77900
La Salle AO 19 2087 79987
Rhêmes-Saint-Georges AO 19 194 80181
Chambave AO 19 931 81112
Saint-Denis AO 20 378 81490

Municipalities with at least 50000 inhabitants

An earthquake occurred to
85 Km NW of Torino (890529 inhabitants)
92 Km NW of Moncalieri (57294 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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 1.1 2020-05-16
23:42:30
45.79 7.31 9 2020-05-16
23:50:49
Sala Sismica INGV-Roma 79213871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-16 23:42:30 ± 0.17
Latitude 45.79 ± 0.01
Longitude 7.31 ± 0.01
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 79213871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 988
Semi-minor axis of confidence ellipse (meter) 868
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 3
Circular confidence region, given by single value of horizontal uncertainty (meter) 990
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.17357
Epicentral distance of station farthest from the epicenter (degree) 0.85795
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 79213871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-16 23:50:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.RSP.HHE. 2020-05-16T23:42:51.57 0.3 undecidable manual S 183 0.6394 50 -0.47 67
MN.BNI.HHE. 2020-05-16T23:42:47.30 0.6 undecidable manual P 211 0.858 50 0.8 38
GU.TRAV.HHZ. 2020-05-16T23:42:44.74 0.3 undecidable manual S 132 0.411 50 -0.53 69
GU.SATI.HHZ. 2020-05-16T23:42:44.94 0.3 undecidable manual S 77 0.3993 50 0.01 78
GU.RSP.HHE. 2020-05-16T23:42:43.35 0.1 undecidable manual P 183 0.6394 50 0.59 86
GU.CIRO.HHZ. 2020-05-16T23:42:40.19 0.3 undecidable manual S 136 0.259 107 -0.3 75
GU.BLANC.HHE. 2020-05-16T23:42:40.53 0.6 undecidable manual S 282 0.2671 106 -0.26 50
GU.TRAV.HHZ. 2020-05-16T23:42:39.32 0.6 undecidable manual P 132 0.411 50 0.47 47
GU.SATI.HHZ. 2020-05-16T23:42:38.54 1.0 positive manual P 77 0.3993 50 -0.11 25
GU.CIRO.HHZ. 2020-05-16T23:42:36.45 0.3 undecidable manual P 136 0.259 107 0.36 74
CH.DIX.HHZ. 2020-05-16T23:42:36.69 0.1 positive manual P 13 0.3004 50 -0.27 100
GU.BLANC.HHE. 2020-05-16T23:42:36.62 0.1 undecidable manual P 282 0.2671 106 0.35 99
IV.MRGE.HHZ. 2020-05-16T23:42:36.74 0.3 undecidable manual S 264 0.1736 114 -0.66 69
IV.MRGE.HHZ. 2020-05-16T23:42:34.54 0.6 positive manual P 264 0.1736 114 0.23 52
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MRGE.HHE. ML:1.1 0.00010001399 0.064 AML other m 2020-05-16T23:42:37.07
IV.MRGE.HHN. ML:1.4 0.0002041054 0.0896 AML other m 2020-05-16T23:42:37.27
GU.CIRO.HHE. ML:0.9 4.0218095E-5 0.064 AML other m 2020-05-16T23:42:40.83
GU.CIRO.HHN. ML:1 5.622057E-5 0.2176 AML other m 2020-05-16T23:42:40.08
CH.DIX.HHE. ML:1.3 8.597455E-5 0.1792 AML other m 2020-05-16T23:42:41.59
CH.DIX.HHN. ML:1.3 8.008167E-5 0.128 AML other m 2020-05-16T23:42:41.87
GU.SATI.HHE. ML:1 2.8589325E-5 0.0768 AML other m 2020-05-16T23:42:45.41
GU.SATI.HHN. ML:1 2.81645E-5 0.0768 AML other m 2020-05-16T23:42:45.40
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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