Earthquake with magnitude of ML 1.4 on date 20-10-2021 and time 09:21:27 (UTC) in region 1 km E Roaschia (CN)

A magnitude ML 1.4 earthquake occured in region: 1 km E Roaschia (CN), on

  • 20-10-2021 09:21:27 (UTC)
  • 20-10-2021 11:21:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.273, 7.476 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
Roaschia CN 2 107 107
Robilante CN 4 2306 2413
Roccavione CN 5 2761 5174
Vernante CN 6 1178 6352
Valdieri CN 6 935 7287
Borgo San Dalmazzo CN 6 12468 19755
Entracque CN 7 774 20529
Roccasparvera CN 8 741 21270
Moiola CN 9 234 21504
Gaiola CN 9 582 22086
Boves CN 9 9835 31921
Vignolo CN 10 2600 34521
Rittana CN 11 109 34630
Valloriate CN 11 109 34739
Limone Piemonte CN 11 1485 36224
Cervasca CN 12 5013 41237
Peveragno CN 13 5543 46780
Bernezzo CN 13 4104 50884
Cuneo CN 15 56081 106965
Demonte CN 15 2003 108968
Caraglio CN 17 6836 115804
Valgrana CN 17 786 116590
Beinette CN 17 3423 120013
Chiusa di Pesio CN 17 3676 123689
Monterosso Grana CN 19 505 124194

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km SW of Cuneo (56081 inhabitants)
56 Km NW of Sanremo (54807 inhabitants)
80 Km W of Savona (61345 inhabitants)
83 Km S of Moncalieri (57294 inhabitants)
91 Km S of Torino (890529 inhabitants)
91 Km SW of Asti (76202 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 1.4 2021-10-20
09:21:27
44.2733 7.4757 10 2021-10-20
09:28:14
Sala Sismica INGV-Roma 96796241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-20 09:21:27 ± 0.11
Latitude 44.2733 ± 0.0090
Longitude 7.4757 ± 0.0113
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96796241

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1160
Semi-minor axis of confidence ellipse (meter) 690
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 36
Circular confidence region, given by single value of horizontal uncertainty (meter) 1160
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
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) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.06025
Epicentral distance of station farthest from the epicenter (degree) 0.62413
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 96796241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-20 09:28:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.CANO.HHZ. 2021-10-20T09:21:46.11 0.6 undecidable manual S 97 0.5495 50 0.03 48
GU.IMI.HHZ. 2021-10-20T09:21:44.19 0.6 undecidable manual S 140 0.4703 50 0.45 45
GU.RORO.HHZ. 2021-10-20T09:21:43.17 0.6 undecidable manual S 111 0.4533 50 -0.05 49
IV.QLNO.HHZ. 2021-10-20T09:21:39.38 0.6 undecidable manual P 85 0.6241 50 0.03 47
GU.BHB.HHE. 2021-10-20T09:21:38.60 0.1 undecidable manual P 345 0.5819 50 -0.02 96
GU.CANO.HHZ. 2021-10-20T09:21:38.18 0.1 undecidable manual P 97 0.5495 50 0.12 95
GU.IMI.HHZ. 2021-10-20T09:21:36.96 0.1 undecidable manual P 140 0.4703 50 0.25 94
GU.RORO.HHZ. 2021-10-20T09:21:36.52 0.1 undecidable manual P 111 0.4533 50 0.11 97
GU.PZZ.HHZ. 2021-10-20T09:21:34.93 0.1 undecidable manual P 312 0.3471 50 0.33 94
GU.MGRO.HHZ. 2021-10-20T09:21:34.11 0.1 undecidable manual P 134 0.3318 50 -0.23 97
FR.SAOF.HHZ. 2021-10-20T09:21:33.77 0.1 undecidable manual P 169 0.2923 50 0.1 100
GU.GBOS.HHZ. 2021-10-20T09:21:32.49 0.3 undecidable manual P 97 0.2626 50 -0.67 65
GU.STV.HHZ. 2021-10-20T09:21:29.94 1.0 undecidable manual P 255 0.1106 129 -0.33 25
GU.ENR.HHZ. 2021-10-20T09:21:28.86 0.6 undecidable manual P 223 0.0603 146 -0.65 45
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.ENR.HHE. ML:0 0.000489559 0.4416 AML other m 2021-10-20T09:21:32.05
GU.STV.HHN. ML:1.2 0.0001636687 0.48 AML other m 2021-10-20T09:21:33.47
GU.ENR.HHN. ML:0 0.00062267555 0.384 AML other m 2021-10-20T09:21:32.81
GU.STV.HHE. ML:1.2 0.00016129805 0.3968 AML other m 2021-10-20T09:21:33.46
GU.GBOS.HHE. ML:1.2 7.23E-5 0.34 AML other m 2021-10-20T09:21:38.63
GU.GBOS.HHN. ML:1.6 0.0001915 1.5 AML other m 2021-10-20T09:21:38.80
IV.QLNO.HHE. ML:1.4 4.115507E-5 0.3584 AML other m 2021-10-20T09:21:52.80
IV.QLNO.HHN. ML:1.6 5.9381165E-5 0.3776 AML other m 2021-10-20T09:21:53.41
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