Earthquake with magnitude of M 2.3 on date 09-06-1986 and time 20:31:11 (Italy) in region 4 km SW Macugnaga (VB)

A magnitude M 2.3 earthquake occured in region: 4 km SW Macugnaga (VB), on

  • 09-06-1986 18:31:11 (UTC)
  • 09-06-1986 20:31:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.94, 7.95 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 4 557 557
Carcoforo VC 8 78 635
Alagna Valsesia VC 9 408 1043
Rima San Giuseppe VC 10 59 1102
Ceppo Morelli VB 10 321 1423
Riva Valdobbia VC 11 258 1681
Rimasco VC 12 106 1787
Vanzone con San Carlo VB 13 407 2194
Mollia VC 15 95 2289
Gressoney-La-Trinité AO 16 303 2592
Bannio Anzino VB 16 475 3067
Campertogno VC 16 237 3304
Fobello VC 17 196 3500
Boccioleto VC 17 205 3705
Cervatto VC 17 47 3752
Rossa VC 18 180 3932
Rimella VC 18 134 4066
Calasca-Castiglione VB 19 649 4715
Antrona Schieranco VB 19 428 5143
Rassa VC 19 71 5214
Balmuccia VC 20 112 5326
Piode VC 20 202 5528
Gressoney-Saint-Jean AO 20 807 6335

Municipalities with at least 50000 inhabitants

An earthquake occurred to
69 Km W of Varese (80799 inhabitants)
72 Km W of Gallarate (53343 inhabitants)
75 Km NW of Novara (104380 inhabitants)
79 Km W of Busto Arsizio (83106 inhabitants)
84 Km W of Legnano (60262 inhabitants)
89 Km W of Como (84495 inhabitants)
96 Km W of Rho (50434 inhabitants)
98 Km N of Torino (890529 inhabitants)
99 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
Rev 1000 M 2.3 1986-06-09
18:31:11
45.94 7.95 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 29019
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-06-09 18:31:11 ± 0.256
Latitude 45.94 ± 0.02
Longitude 7.95 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 29019

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 2660
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 227
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.0051
Epicentral distance of station farthest from the epicenter (degree) 0.00826
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information

M:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 29019
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:50:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.RSP.Z. 1986-06-09T18:31:42.60 10.0 undecidable manual SG 212 0.0083 0.06 0.8
--.LSD.Z. 1986-06-09T18:31:36.70 10.0 undecidable manual SG 230 0.0066 0.25 0.4
--.VAI.Z. 1986-06-09T18:31:31.00 10.0 undecidable manual SG 97 0.0051 -0.36 0.2
--.RSP.Z. 1986-06-09T18:31:29.20 10.0 undecidable manual PG 212 0.0083 -0.01 2
--.LSD.Z. 1986-06-09T18:31:25.50 10.0 undecidable manual PG 230 0.0066 -0.2 1.4
--.VAI.Z. 1986-06-09T18:31:23.00 10.0 undecidable manual PG 97 0.0051 0.24 1.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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