Earthquake with magnitude of ML 1.4 on date 21-10-2021 and time 04:06:57 (Italy) in region Confine Italia Svizzera (SVIZZERA)

A magnitude ML 1.4 earthquake occured in region: Confine Italia Svizzera (SVIZZERA), on

  • 21-10-2021 02:06:57 (UTC)
  • 21-10-2021 04:06:57 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.241, 9.051 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
Cavargna CO 17 227 227
San Nazzaro Val Cavargna CO 18 314 541
San Bartolomeo Val Cavargna CO 19 1027 1568
Dosso del Liro CO 19 264 1832
Val Rezzo CO 19 173 2005
Garzeno CO 19 806 2811
Cusino CO 20 223 3034

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km N of Como (84495 inhabitants)
50 Km NE of Varese (80799 inhabitants)
67 Km NE of Gallarate (53343 inhabitants)
71 Km N of Busto Arsizio (83106 inhabitants)
73 Km N of Legnano (60262 inhabitants)
75 Km N of Monza (122671 inhabitants)
77 Km N of Cinisello Balsamo (75078 inhabitants)
77 Km NW of Bergamo (119381 inhabitants)
79 Km N of Rho (50434 inhabitants)
80 Km N of Sesto San Giovanni (81608 inhabitants)
87 Km N of Milano (1345851 inhabitants)
94 Km NE of Novara (104380 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 2021-10-21
02:06:57
46.2408 9.0513 6 2021-10-21
02:16:27
Sala Sismica INGV-Roma 96818321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-21 02:06:57 ± 0.13
Latitude 46.2408 ± 0.0045
Longitude 9.0513 ± 0.0117
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 96818321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 660
Semi-minor axis of confidence ellipse (meter) 590
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 259
Circular confidence region, given by single value of horizontal uncertainty (meter) 660
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 101
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.91731
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 7
Type of magnitude ML
Reference to an origin 96818321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-21 02:16:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MTRA.EHZ. 2021-10-21T02:08:20.54 3.0 undecidable manual Pg 9.55 0
IV.MSSA.HHZ. 2021-10-21T02:08:02.08 3.0 undecidable manual Sg -0.4 0
IV.CPGN.EHZ. 2021-10-21T02:07:56.78 3.0 undecidable manual Pg 3.72 0
GU.GORR.HHZ. 2021-10-21T02:07:28.47 3.0 undecidable manual Pg -1.67 0
IV.MBAL.EHZ. 2021-10-21T02:07:24.84 3.0 undecidable manual Pg -0.27 0
IV.MERA.HNE. 2021-10-21T02:07:18.54 1.0 undecidable manual S 154 0.5963 50 -0.42 22
CH.FUORN.HHZ. 2021-10-21T02:07:15.59 0.6 negative manual P 65 0.9173 50 0.09 44
CH.PLONS.HHE. 2021-10-21T02:07:14.08 0.6 undecidable manual P 16 0.8391 50 -0.08 44
IV.VARE.HHE. 2021-10-21T02:07:13.48 0.3 undecidable manual S 208 0.4209 50 -0.29 70
CH.BNALP.HHE. 2021-10-21T02:07:13.15 0.3 undecidable manual P 326 0.7626 50 0.3 65
CH.DAVOX.HHZ. 2021-10-21T02:07:12.94 0.6 undecidable manual P 46 0.7842 50 -0.29 43
CH.BERNI.HHZ. 2021-10-21T02:07:11.45 0.6 positive manual P 75 0.6925 50 -0.2 45
IV.MERA.HNE. 2021-10-21T02:07:10.24 0.3 undecidable manual P 154 0.5963 50 0.24 68
IV.MDI.HHE. 2021-10-21T02:07:10.94 0.3 undecidable manual P 135 0.6592 50 -0.14 68
CH.FUSIO.HHZ. 2021-10-21T02:07:10.89 0.3 undecidable manual S 309 0.3426 99 -0.25 71
CH.MUGIO.HHZ. 2021-10-21T02:07:09.95 0.1 undecidable manual S 181 0.3193 100 -0.29 95
IV.VARE.HHE. 2021-10-21T02:07:07.53 0.3 undecidable manual P 208 0.4209 50 0.52 66
CH.FUSIO.HHZ. 2021-10-21T02:07:05.48 0.1 negative manual P 309 0.3426 99 -0.01 100
CH.MUGIO.HHZ. 2021-10-21T02:07:05.35 0.1 undecidable manual P 181 0.3193 100 0.38 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
CH.FUSIO.HHN. ML:1.3 7.248795E-5 0.1088 AML other m 2021-10-21T02:07:11.90
CH.FUSIO.HHE. ML:1.5 0.00010946 0.0896 AML other m 2021-10-21T02:07:12.26
CH.BERNI.HHE. ML:1.2 2.2901205E-5 0.0896 AML other m 2021-10-21T02:07:21.97
CH.BERNI.HHN. ML:1.4 3.365634E-5 0.1696 AML other m 2021-10-21T02:07:20.93
CH.DAVOX.HHN. ML:1.7 6.435223E-5 1.3504 AML other m 2021-10-21T02:07:42.87
CH.FUORN.HHE. ML:1.2 1.58205675E-5 1.0704 AML other m 2021-10-21T02:07:36.60
CH.FUORN.HHN. ML:1.4 2.389129E-5 2.1296 AML other m 2021-10-21T02:07:46.52
IV.MBAL.EHE. ML:1.7 2.2585684E-5 0.1616 AML other m 2021-10-21T02:07:45.25
IV.MBAL.EHN. ML:1.6 1.9898155E-5 0.1408 AML other m 2021-10-21T02:07:46.46
IV.MBAL.HNE. ML:2.5 0.00014653655 1.04 AML other m 2021-10-21T02:07:33.81
IV.MBAL.HNN. ML:2.6 0.000189171875 0.9392 AML other m 2021-10-21T02:08:09.63
GU.GORR.HHE. ML:2.5 0.0001088985 2.08 AML other m 2021-10-21T02:07:54.39
GU.GORR.HHN. ML:2.3 6.5653615E-5 1.72 AML other m 2021-10-21T02:07:50.11
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