Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 23-09-2020 and time 13:30:01 (Italy) in region Confine Italia Svizzera (SVIZZERA)

A magnitude ML 2.1 earthquake occured in region: Confine Italia Svizzera (SVIZZERA), on

  • 23-09-2020 11:30:01 (UTC)
  • 23-09-2020 13:30:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.6020, 9.4160 at 9 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
92 Km NE of Como (84495 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
Bulletin
Rev1000 		ML 2.1 2020-09-23
11:30:01		 46.6017 9.4158 9 2021-02-26
14:56:12		 Bollettino Sismico Italiano INGV 85883611
Reviewed
Rev100 		ML 2.1 2020-09-23
11:30:01		 46.5945 9.4323 9 2020-09-23
11:39:04		 Sala Sismica INGV-Roma 83156571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-23 11:30:01 ± 0.19
Latitude 46.6017 ± 0.0090
Longitude 9.4158 ± 0.0092
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 85883611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 935
Semi-minor axis of confidence ellipse (meter) 660
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 194
Circular confidence region, given by single value of horizontal uncertainty (meter) 930.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 65
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 5.41212
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.4
Num. used stations 36
Type of magnitude ML
Reference to an origin 85883611
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-12-30 16:38:17

ML:2.1

Field Value
Value 2.1
Uncertainty 0.4
Num. used stations 36
Type of magnitude ML
Reference to an origin 83156571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-23 11:39:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RIBO.EHZ.01 2020-09-23T11:31:47.28 3.0 undecidable manual Sn 1.87 0
IV.CRTC.HHZ. 2020-09-23T11:31:47.28 3.0 undecidable manual Sn 3.88 0
IV.PII.HHZ. 2020-09-23T11:31:29.24 3.0 undecidable manual Sg 4.55 0
IV.VIVA.HHZ. 2020-09-23T11:31:26.06 3.0 positive manual P 600.7431 3.07 0
IV.IMOL.HNZ. 2020-09-23T11:31:15.81 3.0 undecidable manual Sn -3.86 0
IV.SAP2.EHZ. 2020-09-23T11:31:11.92 3.0 negative manual P 499.3224 1.56 0
IV.SARZ.HHZ. 2020-09-23T11:30:33.21 3.0 negative manual P 196.2591 0.56 0
GU.REMY.HHZ. 2020-09-23T11:30:33.39 3.0 undecidable manual P 192.9624 1.14 0
MN.CAPR.HNZ. 2020-09-23T11:30:33.88 3.0 undecidable manual P 0
GU.TRAV.HHZ. 2020-09-23T11:30:29.83 3.0 positive manual P 176.2902 -0.32 0
SI.MOSI.HHZ. 2020-09-23T11:30:27.20 0.6 undecidable manual S 89 86.4468 50 -0.06 45
SI.LUSI.HHZ. 2020-09-23T11:30:25.14 3.0 negative manual P 137.0628 1.04 0
CH.BNALP.HHZ. 2020-09-23T11:30:25.40 0.1 undecidable manual S 292 81.0522 50 -0.42 84
GU.SATI.HHZ. 2020-09-23T11:30:25.45 3.0 undecidable manual P 143.4453 0.37 0
IV.MAGA.HHZ. 2020-09-23T11:30:24.29 3.0 undecidable manual P 130.6692 1.18 0
IV.BRMO.HHZ. 2020-09-23T11:30:23.40 0.6 undecidable manual S 100 74.2701 50 -0.62 40
ST.OZOL.EHZ. 2020-09-23T11:30:22.74 3.0 undecidable manual P 126.7731 0.22 0
ST.RONC.EHZ. 2020-09-23T11:30:21.18 0.3 undecidable manual P 126 115.3956 50 0.43 58
CH.FUORN.HHN. 2020-09-23T11:30:21.10 0.6 undecidable manual S 88 64.5909 50 -0.34 44
IV.MABI.HHZ. 2020-09-23T11:30:19.38 0.6 undecidable manual P 125 103.7184 50 0.43 40
IV.MDI.HHZ. 2020-09-23T11:30:18.10 0.6 undecidable manual P 166 95.1381 50 0.47 40
CH.PLONS.HHZ. 2020-09-23T11:30:17.00 0.3 undecidable manual S 357 49.7169 50 -0.46 66
IV.VARE.HHZ. 2020-09-23T11:30:17.70 0.6 undecidable manual P 212 95.3379 50 0.04 44
SI.MOSI.HHZ. 2020-09-23T11:30:16.69 0.3 undecidable manual P 89 86.4468 50 0.41 62
CH.BNALP.HHZ. 2020-09-23T11:30:16.05 0.1 undecidable manual P 292 81.0522 50 0.6 79
CH.MUGIO.HHZ. 2020-09-23T11:30:15.44 0.1 undecidable manual P 201 80.6637 50 0.04 91
CH.DAVOX.HHZ. 2020-09-23T11:30:14.40 0.1 undecidable manual S 60 40.4262 50 -0.6 85
IV.BRMO.HHZ. 2020-09-23T11:30:14.56 0.6 undecidable manual P 100 74.2701 50 0.14 45
CH.FUORN.HHN. 2020-09-23T11:30:13.16 0.3 undecidable manual P 88 64.5909 50 0.23 67
CH.FUSIO.HHZ. 2020-09-23T11:30:12.10 0.1 positive manual P 254 59.6958 50 -0.07 94
CH.PLONS.HHZ. 2020-09-23T11:30:11.03 0.1 undecidable manual P 357 49.7169 50 0.4 89
CH.BERNI.HHZ. 2020-09-23T11:30:10.75 0.1 negative manual P 114 50.8158 50 -0.05 95
CH.DAVOX.HHZ. 2020-09-23T11:30:09.42 0.1 positive manual P 60 40.4262 50 0.22 94
MN.TUE.HHZ. 2020-09-23T11:30:06.80 0.1 undecidable manual S 200 15.2736 121 -0.68 86
MN.TUE.HHZ. 2020-09-23T11:30:05.00 0.1 positive manual P 200 15.2736 121 0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
MN.TUE.HNE. ML:0.0 0.003905398 0.1024 AML other m 2020-09-23T11:30:06.95
MN.TUE.HHE. ML:0.0 0.0040644065 0.1216 AML other m 2020-09-23T11:30:06.95
MN.TUE.HHN. ML:0.0 0.0012869304999999999 0.1344 AML other m 2020-09-23T11:30:07.26
MN.TUE.HNN. ML:0.0 0.0011846222499999998 0.1344 AML other m 2020-09-23T11:30:07.26
CH.DAVOX.HHN. ML:0.0 0.0018326009999999999 0.3008 AML other m 2020-09-23T11:30:14.76
CH.DAVOX.HHE. ML:0.0 0.0014480205 0.3712 AML other m 2020-09-23T11:30:14.72
CH.PLONS.HHE. ML:0.0 0.00027690595000000003 0.288 AML other m 2020-09-23T11:30:17.14
CH.PLONS.HHN. ML:0.0 0.0001225977 0.1856 AML other m 2020-09-23T11:30:17.49
CH.BERNI.HHE. ML:0.0 0.00013593851000000002 0.0768 AML other m 2020-09-23T11:30:17.91
CH.BERNI.HHN. ML:0.0 0.0001191414 0.0832 AML other m 2020-09-23T11:30:18.79
CH.FUSIO.HHN. ML:0.0 0.00033572175 0.1472 AML other m 2020-09-23T11:30:19.24
CH.FUSIO.HHE. ML:0.0 0.00025925505 0.2304 AML other m 2020-09-23T11:30:19.33
IV.BRMO.HHE. ML:0.0 0.000049590115000000006 0.2368 AML other m 2020-09-23T11:30:25.08
IV.BRMO.HHN. ML:0.0 0.000060966485 1.8016 AML other m 2020-09-23T11:30:26.06
CH.BNALP.HHN. ML:0.0 0.000047135620000000005 0.1216 AML other m 2020-09-23T11:30:26.09
CH.MUGIO.HHE. ML:0.0 0.00005337372 0.1344 AML other m 2020-09-23T11:30:26.79
CH.MUGIO.HHN. ML:0.0 0.00005295878 0.1408 AML other m 2020-09-23T11:30:26.73
CH.BNALP.HHE. ML:0.0 0.000048566545 0.2112 AML other m 2020-09-23T11:30:27.19
SI.MOSI.HHN. ML:0.0 0.000298041 0.32 AML other m 2020-09-23T11:30:28.44
SI.MOSI.HHE. ML:0.0 0.0002273583 0.5184 AML other m 2020-09-23T11:30:28.52
IV.SARZ.HNE. ML:2.7 0.0001566401 0.2752 AML other m 2020-09-23T11:30:37.34
IV.VARE.HHE. ML:0.0 0.000111917565 0.1792 AML other m 2020-09-23T11:30:37.44
ST.RONC.EHN. ML:0.0 0.00021184920000000002 0.2176 AML other m 2020-09-23T11:30:37.75
ST.RONC.EHE. ML:0.0 0.00013761199999999998 0.16 AML other m 2020-09-23T11:30:37.91
IV.VARE.HHN. ML:0.0 0.00010128523 0.1984 AML other m 2020-09-23T11:30:38.18
IV.SARZ.HNN. ML:2.8 0.00020016489999999997 0.3008 AML other m 2020-09-23T11:30:38.75
IV.MAGA.HHE. ML:0.0 0.0001864605 0.224 AML other m 2020-09-23T11:30:41.75
GU.SATI.HHE. ML:0.0 0.000032572995 0.1984 AML other m 2020-09-23T11:30:44.44
SI.LUSI.HHN. ML:0.0 0.000079049135 0.2368 AML other m 2020-09-23T11:30:44.73
IV.MAGA.HHN. ML:0.0 0.00011278623999999999 0.2944 AML other m 2020-09-23T11:30:45.84
GU.SATI.HHN. ML:0.0 0.000024657705000000003 0.0768 AML other m 2020-09-23T11:30:46.76
SI.LUSI.HHE. ML:0.0 0.00004021115 0.4992 AML other m 2020-09-23T11:30:48.62
GU.TRAV.HHE. ML:0.0 0.000030707845 0.2624 AML other m 2020-09-23T11:30:55.07
GU.TRAV.HHN. ML:0.0 0.000041945360000000004 0.1792 AML other m 2020-09-23T11:30:56.56
IV.SARZ.HHN. ML:2.8 0.00020671359999999999 0.0832 AML other m 2020-09-23T11:31:12.60
IV.SARZ.HHE. ML:2.8 0.00017386347499999998 0.0576 AML other m 2020-09-23T11:31:19.41
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
Waveforms Seismic signals in miniseed + resp format Download