Earthquake with magnitude of ML 0.3 on date 01-03-2021 and time 20:09:30 (Italy) in region Confine Italia Svizzera (SVIZZERA)

A magnitude ML 0.3 earthquake occured in region: Confine Italia Svizzera (SVIZZERA), on

  • 01-03-2021 19:09:30 (UTC)
  • 01-03-2021 20:09:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 45.95, 7.71 at 11 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
Valtournenche AO 11 2277 2277
Chamois AO 14 97 2374
Ayas AO 16 1401 3775
Gressoney-La-Trinité AO 17 303 4078
La Magdeleine AO 17 109 4187
Antey-Saint-André AO 19 602 4789
Torgnon AO 20 558 5347

Municipalities with at least 50000 inhabitants

An earthquake occurred to
88 Km W of Varese (80799 inhabitants)
90 Km W of Gallarate (53343 inhabitants)
91 Km NW of Novara (104380 inhabitants)
97 Km W of Busto Arsizio (83106 inhabitants)
98 Km N of Torino (890529 inhabitants)
Recent and historical Seismicity
Seismic hazard
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 ( 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
ML 0.3 2021-03-01
45.95 7.71 11 2021-03-01
Sala Sismica INGV-Roma 87607491
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2021-03-01 19:09:30 ± 0.15
Latitude 45.95 ± 0.01
Longitude 7.71 ± 0.01
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87607491


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 990
Semi-minor axis of confidence ellipse (meter) 950
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 299
Circular confidence region, given by single value of horizontal uncertainty (meter) 990
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 120
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.20145
Epicentral distance of station farthest from the epicenter (degree) 0.48743
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information


Field Value
Value 0.3
Uncertainty 0.4
Num. used stations 7
Type of magnitude ML
Reference to an origin 87607491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-01 19:17:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MRGE.HHZ. 2021-03-01T19:09:47.35 0.6 undecidable manual S 248 0.4874 50 -0.31 47
GU.TRAV.HHZ. 2021-03-01T19:09:45.99 0.6 undecidable manual S 177 0.4416 50 -0.33 47
GU.CIRO.HHZ. 2021-03-01T19:09:44.14 0.6 undecidable manual S 196 0.3651 50 0.09 50
IV.MRGE.HHZ. 2021-03-01T19:09:40.85 0.1 undecidable manual P 248 0.4874 50 0.36 93
CH.DIX.HHZ. 2021-03-01T19:09:39.93 0.3 undecidable manual S 301 0.2446 50 -0.54 70
GU.TRAV.HHZ. 2021-03-01T19:09:39.81 0.6 undecidable manual P 177 0.4416 50 0.09 50
GU.CIRO.HHZ. 2021-03-01T19:09:38.29 0.1 undecidable manual P 196 0.3651 50 -0.12 100
CH.MMK.HHZ. 2021-03-01T19:09:38.66 0.6 undecidable manual S 61 0.2014 50 -0.55 47
CH.DIX.HHZ. 2021-03-01T19:09:36.73 0.1 negative manual P 301 0.2446 50 0.39 97
CH.MMK.HHZ. 2021-03-01T19:09:35.96 0.3 undecidable manual P 61 0.2014 50 0.35 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
CH.MMK.HHE. ML:-0.1 3.805E-6 0.96 AML other m 2021-03-01T19:09:38.60
CH.MMK.HHN. ML:-0.1 6.045E-6 0.08 AML other m 2021-03-01T19:09:38.62
CH.DIX.HHN. ML:1.2 7.69592155E-5 0.0896 AML other m 2021-03-01T19:09:40.38
CH.DIX.HHE. ML:1.1 6.356915E-5 0.1536 AML other m 2021-03-01T19:09:40.77
GU.CIRO.HHE. ML:0.2 2.616182E-6 0.2816 AML other m 2021-03-01T19:09:44.39
GU.CIRO.HHN. ML:0 2.309317E-6 0.3328 AML other m 2021-03-01T19:09:44.31
IV.MRGE.HHE. ML:0.3 4.0084875E-6 0.384 AML other m 2021-03-01T19:09:47.36
IV.MRGE.HHN. ML:0.3 5.269084E-6 0.3328 AML other m 2021-03-01T19:09:47.46
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download