Earthquake with magnitude of Md 2.7 on date 20-07-1987 and time 00:19:58 (Italy) in region 3 km E Premosello Chiovenda (VB)

A magnitude Md 2.7 earthquake occured in region: 3 km E Premosello Chiovenda (VB), on

  • 19-07-1987 22:19:58 (UTC)
  • 20-07-1987 00:19:58 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.015, 8.363 at 5 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
Premosello-Chiovenda VB 3 2035 2035
Anzola d'Ossola VB 3 427 2462
Vogogna VB 5 1731 4193
Ornavasso VB 7 3439 7632
Pieve Vergonte VB 7 2593 10225
Piedimulera VB 8 1528 11753
Pallanzeno VB 9 1133 12886
Beura-Cardezza VB 9 1485 14371
Mergozzo VB 9 2185 16556
Villadossola VB 10 6653 23209
Gravellona Toce VB 11 7777 30986
Montescheno VB 12 413 31399
Casale Corte Cerro VB 12 3461 34860
Massiola VB 12 127 34987
Valstrona VB 12 1253 36240
Loreglia VB 12 246 36486
Trontano VB 12 1660 38146
Borgomezzavalle VB 12 318 38464
Domodossola VB 13 18192 56656
Cossogno VB 13 644 57300
Miazzina VB 13 361 57661
Germagno VB 14 197 57858
San Bernardino Verbano VB 14 1341 59199
Masera VB 14 1529 60728
Druogno VB 15 1027 61755
Calasca-Castiglione VB 15 649 62404
Cambiasca VB 15 1664 64068
Santa Maria Maggiore VB 16 1266 65334
Quarna Sopra VB 16 259 65593
Caprezzo VB 16 174 65767
Omegna VB 16 15398 81165
Baveno VB 16 4959 86124
Quarna Sotto VB 16 388 86512
Crevoladossola VB 16 4655 91167
Malesco VB 17 1434 92601
Toceno VB 17 770 93371
Intragna VB 17 106 93477
Vignone VB 17 1210 94687
Bognanco VB 17 219 94906
Bannio Anzino VB 17 475 95381
Montecrestese VB 17 1266 96647
Craveggia VB 17 745 97392
Aurano VB 18 111 97503
Bee VB 18 728 98231
Gurro VB 18 217 98448
Verbania VB 18 30961 129409
Rimella VC 18 134 129543
Premeno VB 18 733 130276
Cursolo-Orasso VB 18 94 130370
Arizzano VB 18 1993 132363
Villette VB 19 268 132631
Nonio VB 19 876 133507
Falmenta VB 19 137 133644
Re VB 19 772 134416
Antrona Schieranco VB 20 428 134844
Vanzone con San Carlo VB 20 407 135251
Cesara VB 20 603 135854
Stresa VB 20 4994 140848
Sabbia VC 20 58 140906

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km NW of Varese (80799 inhabitants)
52 Km NW of Gallarate (53343 inhabitants)
59 Km NW of Busto Arsizio (83106 inhabitants)
60 Km W of Como (84495 inhabitants)
64 Km NW of Legnano (60262 inhabitants)
66 Km NW of Novara (104380 inhabitants)
75 Km NW of Rho (50434 inhabitants)
83 Km NW of Cinisello Balsamo (75078 inhabitants)
85 Km NW of Monza (122671 inhabitants)
86 Km NW of Sesto San Giovanni (81608 inhabitants)
87 Km NW of Vigevano (63310 inhabitants)
89 Km NW of Milano (1345851 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
Md 2.7 1987-07-19
22:19:58
46.015 8.363 5 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 52539
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-07-19 22:19:58 ± 0.461
Latitude 46.0150 ± 0.0141
Longitude 8.3630 ± 0.0224
Depth (km) 5 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 52539

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) 2336.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 156
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00413
Epicentral distance of station farthest from the epicenter (degree) 0.03456
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitude information

Md:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 52539
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:50:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.BGF.Z. 1987-07-19T22:20:58.80 10.0 undecidable manual PN 279 0.0346 0.16 1.2
--.SSF.Z. 1987-07-19T22:20:54.80 10.0 undecidable manual PN 288 0.0315 0.95 0.3
--.LOR.Z. 1987-07-19T22:20:52.00 10.0 undecidable manual PN 293 0.03 0.41 1
--.SLE.Z. 1987-07-19T22:20:52.40 10.0 undecidable manual SN 2 0.0157 -0.09 0.8
--.LBF.Z. 1987-07-19T22:20:49.30 10.0 undecidable manual PN 289 0.0285 -0.02 1.4
--.SMF.Z. 1987-07-19T22:20:49.40 10.0 undecidable manual PN 282 0.0286 -0.12 1.3
--.BNI.Z. 1987-07-19T22:20:47.15 10.0 undecidable manual SN 231 0.0137 0.13 0.8
--.STG.Z. 1987-07-19T22:20:47.30 10.0 undecidable manual SN 290 0.0139 -0.36 0.7
--.ZLA.Z. 1987-07-19T22:20:45.80 10.0 undecidable manual SN 359 0.0131 0.13 0.8
--.VDL.Z. 1987-07-19T22:20:30.30 10.0 undecidable manual SG 57 0.008 -0.37 0.6
--.SLE.Z. 1987-07-19T22:20:29.80 10.0 undecidable manual PN 2 0.0157 -0.07 1.9
--.BBS.Z. 1987-07-19T22:20:27.00 10.0 undecidable manual PN 338 0.014 -0.26 1.8
--.BNI.Z. 1987-07-19T22:20:27.61 10.0 undecidable manual PN 231 0.0137 0.89 0.6
--.STG.Z. 1987-07-19T22:20:27.00 10.0 undecidable manual PN 290 0.0139 -0.08 2
--.ZLA.Z. 1987-07-19T22:20:25.70 10.0 undecidable manual PN 359 0.0131 -0.23 1.8
--.LSD.Z. 1987-07-19T22:20:18.30 10.0 undecidable manual PG 236 0.0091 -1.05 0.4
--.VDL.Z. 1987-07-19T22:20:18.00 10.0 undecidable manual PG 57 0.008 0.73 0.9
--.LLS.Z. 1987-07-19T22:20:17.20 10.0 undecidable manual PG 27 0.0084 -0.93 0.5
--.ORX.Z. 1987-07-19T22:20:16.20 10.0 undecidable manual SG 214 0.0041 -0.61 0.5
--.ORO.Z. 1987-07-19T22:20:15.91 10.0 undecidable manual SG 214 0.0042 -1.04 0.2
--.ORX.Z. 1987-07-19T22:20:09.60 10.0 undecidable manual PG 214 0.0041 0.34 0
--.ORO.Z. 1987-07-19T22:20:09.83 10.0 undecidable manual PG 214 0.0042 0.48 1.4
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download