Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 18-02-2020 and time 16:45:15 (Italy) in region 2 km W Campodolcino (SO)

A magnitude ML 1.7 earthquake occured in region: 2 km W Campodolcino (SO), on

  • 18-02-2020 15:45:15 (UTC)
  • 18-02-2020 16:45:15 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 46.4020, 9.3320 at 12 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
Campodolcino SO 2 985 985
Madesimo SO 3 525 1510
San Giacomo Filippo SO 8 373 1883
Piuro SO 11 1929 3812
Chiavenna SO 11 7379 11191
Mese SO 11 1800 12991
Prata Camportaccio SO 12 2952 15943
Gordona SO 13 1959 17902
Villa di Chiavenna SO 14 1010 18912
Samolaco SO 18 2888 21800

Municipalities with at least 50000 inhabitants

An earthquake occurred to
68 Km NE of Como (84495 inhabitants)
76 Km NE of Varese (80799 inhabitants)
83 Km NW of Bergamo (119381 inhabitants)
91 Km N of Monza (122671 inhabitants)
92 Km NE of Gallarate (53343 inhabitants)
94 Km N of Cinisello Balsamo (75078 inhabitants)
95 Km NE of Busto Arsizio (83106 inhabitants)
95 Km NE of Legnano (60262 inhabitants)
97 Km N of Sesto San Giovanni (81608 inhabitants)
100 Km N of Rho (50434 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 1.7 2020-02-18
15:45:15		 46.4023 9.3318 12 2020-07-18
21:08:34		 Bollettino Sismico Italiano INGV 78539421
Reviewed
Rev100 		ML 1.7 2020-02-18
15:45:14		 46.4057 9.3368 16 2020-02-18
15:50:57		 Sala Sismica INGV-Roma 76631201
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-18 15:45:15 ± 0.16
Latitude 46.4023 ± 0.0126
Longitude 9.3318 ± 0.0183
Depth (km) 12 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 78539421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1240
Semi-minor axis of confidence ellipse (meter) 1168
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 118
Circular confidence region, given by single value of horizontal uncertainty (meter) 1240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 92
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
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) 0.07105
Epicentral distance of station farthest from the epicenter (degree) 1.09537
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 78539421
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-06-18 20:12:50

ML:1.7

Field Value
Value 1.7
Uncertainty 0.4
Num. used stations 24
Type of magnitude ML
Reference to an origin 76631201
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-18 15:50:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
ST.RONC.EHZ. 2020-02-18T15:45:46.15 0.6 undecidable manual S 115 109.6125 90 -0.61 38
IV.VARE.HHZ. 2020-02-18T15:45:36.97 0.3 undecidable manual S 216 73.371 91 -0.11 68
IV.MAGA.HHZ. 2020-02-18T15:45:36.11 0.3 undecidable manual P 124 121.5894 90 0.91 49
ST.RONC.EHZ. 2020-02-18T15:45:34.09 0.3 undecidable manual P 115 109.6125 90 0.74 54
IV.MABI.HHZ. 2020-02-18T15:45:32.17 0.3 undecidable manual P 113 98.5236 91 0.53 60
CH.DAVOX.HHZ. 2020-02-18T15:45:32.91 0.3 undecidable manual S 45 59.1963 91 -0.38 67
CH.MUGIO.HHZ. 2020-02-18T15:45:31.85 0.3 undecidable manual S 203 57.7977 91 -1.06 51
CH.BERNI.HHZ. 2020-02-18T15:45:30.56 0.3 undecidable manual S 88 52.9026 91 -1.05 52
CH.FUSIO.HHZ. 2020-02-18T15:45:30.63 0.3 undecidable manual S 277 51.5151 91 -0.6 62
IV.VARE.HHZ. 2020-02-18T15:45:28.14 0.3 undecidable manual P 216 73.371 91 0.38 65
IV.MDI.HHZ. 2020-02-18T15:45:28.93 0.3 undecidable manual P 157 76.1682 91 0.74 57
CH.DAVOX.HHZ. 2020-02-18T15:45:25.87 0.3 undecidable manual P 45 59.1963 91 0.29 68
CH.MUGIO.HHZ. 2020-02-18T15:45:25.14 0.3 undecidable manual P 203 57.7977 91 -0.22 69
CH.BERNI.HHZ. 2020-02-18T15:45:24.39 0.3 undecidable manual P 88 52.9026 91 -0.21 70
CH.FUSIO.HHZ. 2020-02-18T15:45:24.62 0.3 undecidable manual P 277 51.5151 91 0.23 70
MN.TUE.HHZ. 2020-02-18T15:45:19.66 0.3 undecidable manual S 9 7.881 136 -0.23 75
MN.TUE.HHZ. 2020-02-18T15:45:18.12 0.1 negative manual P 9 7.881 136 0.28 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
CH.DAVOX.HHE. ML:1.5 0.0000678618656 46.5152 AML other m 2020-02-18T15:45:26.25
MN.TUE.HHE. ML:1.9 0.0011091504 0.1536 AML other m 2020-02-18T15:45:19.69
MN.TUE.HNE. ML:1.9 0.0010679094 0.2176 AML other m 2020-02-18T15:45:19.69
MN.TUE.HHN. ML:1.9 0.0010453356 0.1152 AML other m 2020-02-18T15:45:19.83
MN.TUE.HNN. ML:1.9 0.00099048215 0.128 AML other m 2020-02-18T15:45:19.83
CH.FUSIO.HHN. ML:1.5 0.00007509655499999999 0.1024 AML other m 2020-02-18T15:45:31.10
CH.MUGIO.HHE. ML:1.6 0.00008172403000000001 0.2304 AML other m 2020-02-18T15:45:32.05
CH.FUSIO.HHE. ML:1.4 0.00006330589 0.1024 AML other m 2020-02-18T15:45:32.49
CH.BERNI.HHE. ML:1.0 0.00002250943 0.0768 AML other m 2020-02-18T15:45:32.74
CH.MUGIO.HHN. ML:1.5 0.00007664211499999999 0.2944 AML other m 2020-02-18T15:45:32.90
CH.BERNI.HHN. ML:1.0 0.0000230771525 0.1536 AML other m 2020-02-18T15:45:32.87
CH.DAVOX.HHN. ML:1.6 0.00008115528499999999 0.192 AML other m 2020-02-18T15:45:34.08
IV.VARE.HHN. ML:1.6 0.000065692425 0.256 AML other m 2020-02-18T15:45:37.45
IV.VARE.HHE. ML:1.5 0.00004702784 0.256 AML other m 2020-02-18T15:45:37.32
ST.RONC.EHN. ML:2.0 0.00008899432999999999 0.1792 AML other m 2020-02-18T15:45:47.79
ST.RONC.EHE. ML:2.0 0.00007891826000000001 0.1536 AML other m 2020-02-18T15:45:48.62
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