Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 18-10-2023 and time 00:17:26 (UTC) in region Confine Italia Svizzera (SVIZZERA)

A magnitude ML 1.1 earthquake occured in region: Confine Italia Svizzera (SVIZZERA), on

  • 18-10-2023 00:17:26 (UTC)
  • 18-10-2023 02:17:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.5410, 9.5470 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Madesimo SO 20 525 525

Municipalities with at least 50000 inhabitants

An earthquake occurred to
89 Km NE of Como (84495 inhabitants)
95 Km N of Bergamo (119381 inhabitants)
98 Km NE of Varese (80799 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.1 2023-10-18
00:17:26		 46.541 9.547 10 2023-10-18
00:45:01		 Sala Sismica INGV-Roma 122164271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-18 00:17:26 ± 0.23
Latitude 46.5410 ± 0.0108
Longitude 9.5470 ± 0.0118
Depth (km) 10 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 122164271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1164
Semi-minor axis of confidence ellipse (meter) 625
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 338
Circular confidence region, given by single value of horizontal uncertainty (meter) 1160.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 56
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.48
Epicentral distance of station closest to the epicenter (degree) 0.15378
Epicentral distance of station farthest from the epicenter (degree) 0.93080
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 122164271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-10-18 00:45:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CH.MUGIO.HHE. 2023-10-18T00:17:50.37 0.3 undecidable manual S 210 78.8655 50 -0.32 65
CH.FUSIO.HHZ. 2023-10-18T00:17:46.91 0.3 undecidable manual S 262 68.1762 50 -0.93 53
IV.BRMO.HHE. 2023-10-18T00:17:45.78 0.3 undecidable manual S 96 63.3921 50 -0.79 57
ST.RONC.EHZ. 2023-10-18T00:17:45.06 0.1 undecidable manual P 127 103.3188 50 0.62 76
CH.FUORN.HHE. 2023-10-18T00:17:44.46 0.3 undecidable manual S 81 55.3002 50 0.05 72
CH.PLONS.HHE. 2023-10-18T00:17:44.60 0.3 undecidable manual S 347 57.7977 50 -0.46 65
IV.VARE.HHZ. 2023-10-18T00:17:43.94 0.3 undecidable manual P 219 95.6376 50 0.69 56
CH.BNALP.HHE. 2023-10-18T00:17:43.55 0.3 undecidable manual P 294 92.8404 50 0.73 55
IV.MDI.HHE. 2023-10-18T00:17:42.06 0.3 undecidable manual P 171 86.5467 50 0.21 65
CH.MUGIO.HHE. 2023-10-18T00:17:41.21 0.1 undecidable manual P 210 78.8655 50 0.54 82
CH.BERNI.HHZ. 2023-10-18T00:17:39.37 0.3 undecidable manual S 111 39.0276 50 -0.69 62
CH.FUSIO.HHZ. 2023-10-18T00:17:39.27 0.1 undecidable manual P 262 68.1762 50 0.25 90
CH.DAVOX.HHE. 2023-10-18T00:17:38.90 0.3 undecidable manual S 43 36.741 50 -0.54 66
IV.BRMO.HHE. 2023-10-18T00:17:38.48 0.1 undecidable manual P 96 63.3921 50 0.19 91
CH.PLONS.HHE. 2023-10-18T00:17:38.41 0.3 undecidable manual P 347 57.7977 50 0.99 53
CH.FUORN.HHE. 2023-10-18T00:17:37.27 0.1 undecidable manual P 81 55.3002 50 0.23 92
CH.DAVOX.HHE. 2023-10-18T00:17:34.20 0.1 undecidable manual P 43 36.741 50 0.03 99
CH.BERNI.HHZ. 2023-10-18T00:17:34.45 0.1 undecidable manual P 111 39.0276 50 -0.08 98
MN.TUE.HHZ. 2023-10-18T00:17:32.89 0.3 undecidable manual S 243 17.0718 121 -0.97 57
MN.TUE.HHZ. 2023-10-18T00:17:30.79 0.1 undecidable manual P 243 17.0718 121 -0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
MN.TUE.HNN. ML:0.9 0.000066319745 0.14 AML other m 2023-10-18T00:17:32.96
MN.TUE.HHE. ML:1.1 0.00009932516 0.12 AML other m 2023-10-18T00:17:32.96
MN.TUE.HNE. ML:1.0 0.00009357657499999999 0.12 AML other m 2023-10-18T00:17:32.96
MN.TUE.HHN. ML:0.8 0.000050286915 0.08 AML other m 2023-10-18T00:17:32.98
CH.BERNI.HHE. ML:1.0 0.000041822615 0.08 AML other m 2023-10-18T00:17:40.66
CH.BERNI.HHN. ML:1.0 0.000034813045000000003 0.2 AML other m 2023-10-18T00:17:40.03
CH.FUSIO.HHE. ML:1.1 0.00002176395 0.13 AML other m 2023-10-18T00:17:48.58
CH.FUSIO.HHN. ML:1.2 0.000026441265999999997 0.11 AML other m 2023-10-18T00:17:48.51
IV.VARE.HHE. ML:1.3 0.0000193766305 0.12 AML other m 2023-10-18T00:18:04.49
IV.VARE.HHN. ML:1.3 0.000019129414999999998 0.2 AML other m 2023-10-18T00:17:57.71
ST.RONC.EHE. ML:1.4 0.000026269439 0.18 AML other m 2023-10-18T00:17:59.45
ST.RONC.EHN. ML:1.6 0.000041540185 0.22 AML other m 2023-10-18T00:17:59.45
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