Earthquake with magnitude of ML 1.3 on date 27-10-2021 and time 03:37:01 (UTC) in region Confine Italia Svizzera (SVIZZERA)

A magnitude ML 1.3 earthquake occured in region: Confine Italia Svizzera (SVIZZERA), on

  • 27-10-2021 03:37:01 (UTC)
  • 27-10-2021 05:37:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.33, 8.539 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
Formazza VB 10 445 445
Premia VB 17 564 1009
Baceno VB 18 918 1927

Municipalities with at least 50000 inhabitants

An earthquake occurred to
61 Km NW of Varese (80799 inhabitants)
72 Km NW of Como (84495 inhabitants)
77 Km N of Gallarate (53343 inhabitants)
83 Km NW of Busto Arsizio (83106 inhabitants)
87 Km NW of Legnano (60262 inhabitants)
97 Km NW of Rho (50434 inhabitants)
98 Km N of Novara (104380 inhabitants)
100 Km NW of Cinisello Balsamo (75078 inhabitants)
100 Km NW of Monza (122671 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 1.3 2021-10-27
03:37:01
46.3298 8.539 10 2021-10-27
03:52:07
Sala Sismica INGV-Roma 97012091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-27 03:37:01 ± 0.18
Latitude 46.3298 ± 0.0108
Longitude 8.5390 ± 0.0117
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97012091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1050
Semi-minor axis of confidence ellipse (meter) 848
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 347
Circular confidence region, given by single value of horizontal uncertainty (meter) 1050
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 141
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.02703
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 97012091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-27 03:52:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IX.SSB3.HHZ.02 2021-10-27T03:38:51.95 3.0 positive manual Pn 7.03 0
IV.FIR.HHZ. 2021-10-27T03:38:38.93 3.0 undecidable manual Sg 9.78 0
IV.FIAM.HHZ. 2021-10-27T03:38:25.95 3.0 positive manual Pn 7.45 0
IV.VENL.EHZ. 2021-10-27T03:38:20.08 3.0 undecidable manual Sn 0.08 0
IV.MMUR.HNZ. 2021-10-27T03:38:10.09 3.0 positive manual Pn 4.48 0
IV.ARVD.HHZ. 2021-10-27T03:38:09.00 3.0 undecidable manual Pn 4.32 0
IV.RIBO.EHZ.01 2021-10-27T03:38:07.87 3.0 undecidable manual Pg 8.57 0
IV.FIR.HHZ. 2021-10-27T03:38:03.31 3.0 undecidable manual Pg 12.61 0
GU.PZZ.HHZ. 2021-10-27T03:37:41.19 3.0 undecidable manual Pg 5.82 0
CH.BERNI.HHE. 2021-10-27T03:37:34.41 0.6 undecidable manual S 85 1.027 50 -0.43 38
GU.CIRO.HHZ. 2021-10-27T03:37:33.25 0.6 undecidable manual S 223 0.992 50 -0.56 37
CH.PLONS.HHE. 2021-10-27T03:37:31.36 0.6 undecidable manual S 38 0.9218 50 -0.37 40
GU.GORR.HHZ. 2021-10-27T03:37:31.30 3.0 undecidable manual Pn -0.27 0
CH.DIX.HHZ. 2021-10-27T03:37:28.61 0.6 undecidable manual S 253 0.8211 50 -0.13 43
CH.DAVOX.HHZ. 2021-10-27T03:37:21.33 0.1 undecidable manual P 63 1.0252 50 0.5 76
GU.CIRO.HHZ. 2021-10-27T03:37:20.58 0.1 undecidable manual P 223 0.992 50 0.32 79
GU.TRAV.HHZ. 2021-10-27T03:37:20.57 3.0 negative manual P 0.21 0
CH.BERNI.HHE. 2021-10-27T03:37:20.64 0.1 undecidable manual P 85 1.027 50 -0.21 80
CH.MUGIO.HHZ. 2021-10-27T03:37:19.87 0.6 undecidable manual S 139 0.536 50 -0.43 43
CH.PLONS.HHE. 2021-10-27T03:37:19.58 0.1 undecidable manual P 38 0.9218 50 0.52 77
IV.VARE.HHZ. 2021-10-27T03:37:18.61 0.6 undecidable manual S 161 0.4892 50 -0.29 44
CH.MMK.HHZ. 2021-10-27T03:37:18.11 0.3 undecidable manual S 235 0.4856 50 -0.7 59
CH.DIX.HHZ. 2021-10-27T03:37:17.65 0.1 undecidable manual P 253 0.8211 50 0.32 82
CH.MUGIO.HHZ. 2021-10-27T03:37:12.70 0.1 undecidable manual P 139 0.536 50 0.24 89
IV.VARE.HHZ. 2021-10-27T03:37:12.04 0.1 undecidable manual P 161 0.4892 50 0.39 87
CH.BNALP.HHZ. 2021-10-27T03:37:12.73 3.0 undecidable manual P 0.28 0
CH.MMK.HHZ. 2021-10-27T03:37:11.62 0.6 negative manual P 235 0.4856 50 0.02 47
CH.FUSIO.HHZ. 2021-10-27T03:37:07.88 0.3 undecidable manual S 34 0.1511 121 -0.68 64
CH.FUSIO.HHZ. 2021-10-27T03:37:05.72 0.1 undecidable manual P 34 0.1511 121 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
CH.FUSIO.HHN. ML:1.4 0.00020410565 0.0896 AML other m 2021-10-27T03:37:07.99
CH.FUSIO.HHE. ML:1.4 0.000241906 0.1504 AML other m 2021-10-27T03:37:07.96
CH.MMK.HHE. ML:0.3 5.571928E-6 0.1296 AML other m 2021-10-27T03:37:20.83
CH.MMK.HHN. ML:0.6 9.9969305E-6 0.2192 AML other m 2021-10-27T03:37:20.90
IV.VARE.HHE. ML:1.2 3.3365105E-5 0.2 AML other m 2021-10-27T03:37:19.89
IV.VARE.HHN. ML:1.2 4.031324E-5 0.24 AML other m 2021-10-27T03:37:19.59
CH.MUGIO.HHE. ML:1 1.89507E-5 0.2096 AML other m 2021-10-27T03:37:20.39
CH.MUGIO.HHN. ML:1.2 2.998802E-5 0.1504 AML other m 2021-10-27T03:37:20.16
CH.BNALP.HHE. ML:1.2 3.195646E-5 0.24 AML other m 2021-10-27T03:37:20.11
CH.BNALP.HHN. ML:1.2 2.8849566E-5 0.1808 AML other m 2021-10-27T03:37:20.37
CH.DIX.HHE. ML:1.6 3.97446289E-5 48.1696 AML other m 2021-10-27T03:37:17.52
CH.DIX.HHN. ML:1.1 1.39336096E-5 47.7008 AML other m 2021-10-27T03:37:17.28
GU.TRAV.HHE. ML:1.2 1.6424495E-5 0.1008 AML other m 2021-10-27T03:37:36.98
GU.TRAV.HHN. ML:1.4 1.8809458E-5 0.1808 AML other m 2021-10-27T03:37:37.18
GU.CIRO.HHE. ML:0.8 6.7857405E-6 0.2784 AML other m 2021-10-27T03:37:36.43
GU.CIRO.HHN. ML:1.1 7.9836655E-6 1.04 AML other m 2021-10-27T03:37:53.58
CH.DAVOX.HHE. ML:1.9 6.6073285E-5 2.8608 AML other m 2021-10-27T03:37:52.50
CH.DAVOX.HHN. ML:1.8 4.8793895E-5 1.76 AML other m 2021-10-27T03:37:20.50
GU.GORR.HHE. ML:2.1 3.5123265E-5 1.4816 AML other m 2021-10-27T03:38:20.90
GU.GORR.HHN. ML:2.2 4.453535E-5 1.3392 AML other m 2021-10-27T03:37:33.97
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