Earthquake with magnitude of ML 1.8 on date 15-12-2020 and time 07:34:34 (Italy) in region 3 km SW Macugnaga (VB)

A magnitude ML 1.8 earthquake occured in region: 3 km SW Macugnaga (VB), on

  • 15-12-2020 06:34:34 (UTC)
  • 15-12-2020 07:34:34 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 45.948, 7.95 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Macugnaga VB 3 557 557
Carcoforo VC 9 78 635
Ceppo Morelli VB 10 321 956
Alagna Valsesia VC 11 408 1364
Rima San Giuseppe VC 11 59 1423
Riva Valdobbia VC 13 258 1681
Vanzone con San Carlo VB 13 407 2088
Rimasco VC 13 106 2194
Bannio Anzino VB 16 475 2669
Mollia VC 16 95 2764
Gressoney-La-Trinité AO 17 303 3067
Fobello VC 17 196 3263
Campertogno VC 18 237 3500
Cervatto VC 18 47 3547
Antrona Schieranco VB 18 428 3975
Calasca-Castiglione VB 18 649 4624
Boccioleto VC 18 205 4829
Rimella VC 19 134 4963
Rossa VC 19 180 5143

Municipalities with at least 50000 inhabitants

An earthquake occurred to
69 Km W of Varese (80799 inhabitants)
73 Km W of Gallarate (53343 inhabitants)
76 Km NW of Novara (104380 inhabitants)
79 Km W of Busto Arsizio (83106 inhabitants)
85 Km W of Legnano (60262 inhabitants)
89 Km W of Como (84495 inhabitants)
97 Km W of Rho (50434 inhabitants)
99 Km N of Torino (890529 inhabitants)
100 Km NW of Vigevano (63310 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 1.8 2020-12-15
06:34:34
45.9482 7.9503 12 2021-02-26
14:56:11
Bollettino Sismico Italiano INGV 85469661
Reviewed
Rev100
ML 1.8 2020-12-15
06:34:34
45.9387 7.9398 12 2020-12-15
06:45:45
Sala Sismica INGV-Roma 85440371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-15 06:34:34 ± 0.1
Latitude 45.9482 ± 0.0063
Longitude 7.9503 ± 0.0091
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 85469661

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 808
Semi-minor axis of confidence ellipse (meter) 297
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 131
Circular confidence region, given by single value of horizontal uncertainty (meter) 810
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 24
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
Epicentral distance of station farthest from the epicenter (degree) 1.26355
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 85469661
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-08 16:40:24

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 24
Type of magnitude ML
Reference to an origin 85440371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-15 06:45:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.NARO.HHZ. 2020-12-15T06:36:30.08 3.0 undecidable manual Sn 3.18 0
IV.CIGN.HHZ. 2020-12-15T06:36:17.16 3.0 undecidable manual Pn 4.41 0
IV.MNTT.EHZ. 2020-12-15T06:36:02.37 3.0 positive manual Pg 12.3 0
MN.TRI.HHZ. 2020-12-15T06:35:43.15 3.0 positive manual Pn 5.23 0
IV.FOSV.EHZ. 2020-12-15T06:35:42.07 3.0 undecidable manual Pn 0.59 0
IV.MBAL.EHZ. 2020-12-15T06:35:40.35 3.0 undecidable manual Sn 1.97 0
IV.FIR.HHZ. 2020-12-15T06:35:35.75 3.0 undecidable manual Pg 9.94 0
IV.MBAL.EHZ. 2020-12-15T06:35:10.30 3.0 negative manual Pn 0.17 0
GU.RNCA.HHZ. 2020-12-15T06:35:03.79 3.0 negative manual Pg -0.4 0
MN.BNI.HHZ. 2020-12-15T06:34:58.35 0.3 undecidable manual P 225 1.2635 91 1.06 42
CH.FUSIO.HHZ. 2020-12-15T06:34:57.41 0.6 undecidable manual S 44 0.7069 91 -0.25 43
GU.BHB.HHN. 2020-12-15T06:34:55.88 0.6 undecidable manual P 204 1.2123 91 -0.53 36
IV.MRGE.HHZ. 2020-12-15T06:34:55.02 0.6 undecidable manual S 254 0.6439 91 -0.78 36
MN.TUE.HHZ. 2020-12-15T06:34:54.24 0.6 undecidable manual P 61 1.099 91 -0.23 39
IV.VARE.HHZ. 2020-12-15T06:34:52.88 0.6 undecidable manual S 98 0.5756 92 -0.89 36
GU.REMY.HHZ. 2020-12-15T06:34:52.80 0.6 undecidable manual S 259 0.563 92 -0.6 40
GU.RSP.HHZ. 2020-12-15T06:34:51.80 0.3 undecidable manual P 211 0.9326 91 0.18 62
GU.TRAV.HHZ. 2020-12-15T06:34:49.60 0.6 undecidable manual S 198 0.4578 92 -0.68 40
GU.CIRO.HHZ. 2020-12-15T06:34:48.89 0.6 undecidable manual S 218 0.4371 92 -0.76 38
CH.FUSIO.HHZ. 2020-12-15T06:34:48.10 0.3 undecidable manual P 44 0.7069 91 0.33 63
GU.LSD.HHZ. 2020-12-15T06:34:48.83 0.1 undecidable manual P 230 0.75 91 0.32 83
CH.MUGIO.HHZ. 2020-12-15T06:34:48.76 0.3 undecidable manual P 92 0.759 91 0.1 65
CH.DIX.HHZ. 2020-12-15T06:34:48.18 0.3 undecidable manual S 290 0.3984 92 -0.35 66
IV.MRGE.HHZ. 2020-12-15T06:34:46.88 0.3 undecidable manual P 254 0.6439 91 0.19 66
IV.VARE.HHZ. 2020-12-15T06:34:45.46 0.1 undecidable manual P 98 0.5756 92 -0.06 92
GU.REMY.HHZ. 2020-12-15T06:34:45.46 0.1 undecidable manual P 259 0.563 92 0.15 90
GU.CIRO.HHZ. 2020-12-15T06:34:43.24 0.1 undecidable manual P 218 0.4371 92 0.09 93
GU.TRAV.HHZ. 2020-12-15T06:34:43.61 0.1 positive manual P 198 0.4578 92 0.1 93
CH.DIX.HHZ. 2020-12-15T06:34:42.66 0.1 negative manual P 290 0.3984 92 0.16 93
CH.MMK.HHN. 2020-12-15T06:34:39.60 0.3 undecidable manual S 5 0.1025 123 -0.34 71
GU.SATI.HHZ. 2020-12-15T06:34:39.58 0.1 undecidable manual S 218 0.0926 128 -0.11 100
CH.MMK.HHN. 2020-12-15T06:34:37.83 0.1 positive manual P 5 0.1025 123 0.29 95
GU.SATI.HHZ. 2020-12-15T06:34:37.81 0.1 undecidable manual P 218 0.0926 128 0.42 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
CH.DIX.HHN. ML:2.3 0.000676 0.26 AML other m 2020-12-15T06:34:48.45
CH.DIX.HHE. ML:2.2 0.0004225 0.74 AML other m 2020-12-15T06:34:48.43
GU.CIRO.HHE. ML:2.1 0.0003685 0.36 AML other m 2020-12-15T06:34:49.12
GU.CIRO.HHN. ML:2.1 0.000309 0.34 AML other m 2020-12-15T06:34:49.12
GU.TRAV.HHN. ML:2.1 0.0003275 0.08 AML other m 2020-12-15T06:34:49.92
GU.TRAV.HHE. ML:2 0.00025 0.56 AML other m 2020-12-15T06:34:50.50
IV.VARE.HHN. ML:1.4 5.018E-5 0.52 AML other m 2020-12-15T06:34:52.28
GU.REMY.HHN. ML:1.9 0.0001545 0.76 AML other m 2020-12-15T06:34:54.01
GU.REMY.HHE. ML:1.8 0.0001255 0.5 AML other m 2020-12-15T06:34:54.37
IV.MRGE.HHE. ML:1.6 6.625E-5 0.26 AML other m 2020-12-15T06:34:56.52
IV.MRGE.HHN. ML:1.8 9.63E-5 0.58 AML other m 2020-12-15T06:34:57.36
IV.VARE.HHE. ML:1.4 4.46E-5 1.36 AML other m 2020-12-15T06:34:58.03
CH.FUSIO.HHN. ML:1.7 7.54E-5 0.1 AML other m 2020-12-15T06:34:59.36
CH.MUGIO.HHN. ML:1.5 3.845E-5 0.56 AML other m 2020-12-15T06:34:59.95
GU.LSD.HHN. ML:1.8 8.11E-5 1.44 AML other m 2020-12-15T06:35:00.04
CH.FUSIO.HHE. ML:1.7 7.065E-5 0.9 AML other m 2020-12-15T06:35:00.95
GU.LSD.HHE. ML:1.8 8.46E-5 1.32 AML other m 2020-12-15T06:35:02.17
CH.MUGIO.HHE. ML:1.4 3.05E-5 0.48 AML other m 2020-12-15T06:35:05.12
GU.RSP.HHN. ML:1.7 4.995E-5 1.14 AML other m 2020-12-15T06:35:05.64
GU.RSP.HHE. ML:1.7 5.19E-5 1.3 AML other m 2020-12-15T06:35:07.00
MN.TUE.HNN. ML:1.7 3.705E-5 0.2 AML other m 2020-12-15T06:35:13.62
MN.TUE.HNE. ML:1.7 3.295E-5 0.52 AML other m 2020-12-15T06:35:14.43
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