Earthquake with magnitude of ML 1.6 on date 02-04-2021 and time 15:47:32 (Italy) in region 7 km SW Macugnaga (VB)

A magnitude ML 1.6 earthquake occured in region: 7 km SW Macugnaga (VB), on

  • 02-04-2021 13:47:32 (UTC)
  • 02-04-2021 15:47:32 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.931, 7.904 at 10 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 7 557 557
Alagna Valsesia VC 9 408 965
Riva Valdobbia VC 12 258 1223
Carcoforo VC 12 78 1301
Rima San Giuseppe VC 12 59 1360
Gressoney-La-Trinité AO 13 303 1663
Ceppo Morelli VB 14 321 1984
Rimasco VC 15 106 2090
Mollia VC 16 95 2185
Vanzone con San Carlo VB 17 407 2592
Campertogno VC 18 237 2829
Gressoney-Saint-Jean AO 18 807 3636
Boccioleto VC 20 205 3841
Bannio Anzino VB 20 475 4316
Rassa VC 20 71 4387

Municipalities with at least 50000 inhabitants

An earthquake occurred to
72 Km W of Varese (80799 inhabitants)
75 Km W of Gallarate (53343 inhabitants)
78 Km NW of Novara (104380 inhabitants)
82 Km W of Busto Arsizio (83106 inhabitants)
87 Km W of Legnano (60262 inhabitants)
93 Km W of Como (84495 inhabitants)
97 Km N of Torino (890529 inhabitants)
99 Km W 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 1.6 2021-04-02
13:47:32
45.9313 7.9038 10 2021-07-12
16:55:10
Bollettino Sismico Italiano INGV 90018101
Reviewed
Rev100
ML 1.6 2021-04-02
13:47:32
45.9257 7.906 10 2021-04-02
13:57:34
Sala Sismica INGV-Roma 88710101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-02 13:47:32 ± 0.19
Latitude 45.9313 ± 0.0108
Longitude 7.9038 ± 0.0129
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90018101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1056
Semi-minor axis of confidence ellipse (meter) 1025
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 347
Circular confidence region, given by single value of horizontal uncertainty (meter) 1060
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 99
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.41
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.18441
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 17
Type of magnitude ML
Reference to an origin 90018101
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-18 13:59:21

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 88710101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-02 13:57:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RIBO.EHZ.01 2021-04-02T13:49:28.94 3.0 undecidable manual Sg 12.97 0
TV.SF04.EHZ. 2021-04-02T13:49:27.33 3.0 undecidable manual Sn 2.44 0
OT.OT13.EHZ. 2021-04-02T13:49:25.07 3.0 positive manual Pn 6.49 0
IV.BRSN.EHZ. 2021-04-02T13:49:07.59 3.0 undecidable manual Sn 0.48 0
IV.RNI2.HHZ. 2021-04-02T13:49:04.73 3.0 undecidable manual Pn 0.31 0
IV.MF5.EHZ. 2021-04-02T13:49:02.15 3.0 undecidable manual Pg 14.83 0
TV.SF04.EHZ. 2021-04-02T13:48:46.28 3.0 undecidable manual Pg 10.5 0
IV.RIBO.EHZ.01 2021-04-02T13:48:40.98 3.0 negative manual Pg 10.21 0
IV.FIU.EHZ. 2021-04-02T13:48:25.79 3.0 negative manual Pg 7.47 0
CH.FUSIO.HHZ. 2021-04-02T13:47:57.05 0.6 undecidable manual S 45 0.741 50 -0.19 43
GU.BHB.HHZ. 2021-04-02T13:47:53.77 0.6 undecidable manual P 203 1.1844 50 -0.64 35
CH.BNALP.HHE. 2021-04-02T13:47:52.09 0.6 undecidable manual P 21 1.0045 50 0.74 35
IV.VARE.HHZ. 2021-04-02T13:47:52.22 0.6 undecidable manual S 96 0.6061 50 -1 34
IV.MRGE.HHZ. 2021-04-02T13:47:52.50 0.6 undecidable manual S 255 0.6088 50 -0.8 37
GU.RSP.HHE. 2021-04-02T13:47:49.96 0.6 undecidable manual P 210 0.9011 50 0.38 40
GU.TRAV.HHE. 2021-04-02T13:47:47.62 0.6 undecidable manual S 195 0.4335 50 -0.49 43
CH.MUGIO.HHZ. 2021-04-02T13:47:47.95 0.6 undecidable manual P 90 0.7914 50 0.26 42
CH.FUSIO.HHZ. 2021-04-02T13:47:47.28 0.1 negative manual P 45 0.741 50 0.44 82
GU.CIRO.HHZ. 2021-04-02T13:47:46.61 0.6 undecidable manual S 216 0.4038 50 -0.63 41
GU.BLANC.HHZ. 2021-04-02T13:47:46.56 0.6 undecidable manual P 263 0.6799 50 0.76 37
IV.MRGE.HHZ. 2021-04-02T13:47:45.23 0.3 undecidable manual P 255 0.6088 50 0.66 59
CH.DIX.HHZ. 2021-04-02T13:47:45.64 0.6 undecidable manual S 294 0.375 50 -0.73 40
IV.VARE.HHZ. 2021-04-02T13:47:44.63 0.3 undecidable manual P 96 0.6061 50 0.11 68
GU.TRAV.HHE. 2021-04-02T13:47:41.78 0.1 undecidable manual P 195 0.4335 50 0.21 92
GU.CIRO.HHZ. 2021-04-02T13:47:41.27 0.1 positive manual P 216 0.4038 50 0.2 93
CH.DIX.HHZ. 2021-04-02T13:47:40.68 0.1 negative manual P 294 0.375 50 0.11 95
CH.MMK.HHE. 2021-04-02T13:47:37.86 0.3 undecidable manual S 19 0.1259 126 -0.81 61
CH.MMK.HHE. 2021-04-02T13:47:36.23 0.1 undecidable manual P 19 0.1259 126 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
CH.DIX.HHE. ML:1.7 0.0001782096445 0.0896 AML other m 2021-04-02T13:47:46.11
CH.DIX.HHN. ML:1.9 0.0002531694 0.0704 AML other m 2021-04-02T13:47:46.29
GU.CIRO.HHE. ML:1.5 8.8006705E-5 0.16 AML other m 2021-04-02T13:47:46.94
GU.CIRO.HHN. ML:1.7 0.000165 0.32 AML other m 2021-04-02T13:47:47.15
IV.VARE.HHE. ML:1.5 5.5337005E-5 0.1152 AML other m 2021-04-02T13:47:53.15
IV.VARE.HHN. ML:1.5 5.9300195E-5 0.1024 AML other m 2021-04-02T13:47:53.60
IV.MRGE.HHE. ML:1.5 5.287792E-5 0.0832 AML other m 2021-04-02T13:47:54.38
IV.MRGE.HHN. ML:1.7 8.033669E-5 0.064 AML other m 2021-04-02T13:47:54.58
CH.FUSIO.HHE. ML:1.6 5.591392E-5 0.16 AML other m 2021-04-02T13:47:58.92
CH.MUGIO.HHN. ML:1.5 3.367143E-5 0.0832 AML other m 2021-04-02T13:47:59.09
CH.FUSIO.HHN. ML:1.6 4.8292915E-5 0.2304 AML other m 2021-04-02T13:47:59.95
CH.MUGIO.HHE. ML:1.3 2.503389E-5 0.192 AML other m 2021-04-02T13:48:02.10
IV.MONC.HHE. ML:1.8 6.678601E-5 0.2816 AML other m 2021-04-02T13:48:07.89
IV.MONC.HHN. ML:0 8.4066095E-5 0.4032 AML other m 2021-04-02T13:48:09.04
GU.BHB.HHE. ML:1.2 1.15854115E-5 0.32 AML other m 2021-04-02T13:48:12.74
MN.BNI.HNN. ML:1.7 2.9585865E-5 0.6784 AML other m 2021-04-02T13:48:13.37
GU.BHB.HHN. ML:1.2 1.12541115E-5 0.16 AML other m 2021-04-02T13:48:14.69
MN.BNI.HNE. ML:1.8 3.7974135E-5 1.3408 AML other m 2021-04-02T13:48:15.89
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