Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.5 on date 27-10-1988 and time 15:35:35 (Italy) in region Confine Italia Svizzera (SVIZZERA)

A magnitude Md 2.5 earthquake occured in region: Confine Italia Svizzera (SVIZZERA), on

  • 27-10-1988 14:35:35 (UTC)
  • 27-10-1988 15:35:35 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 46.3280, 9.2510 at 9 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
San Giacomo Filippo SO 9 373 373
Gordona SO 10 1959 2332
Mese SO 10 1800 4132
Prata Camportaccio SO 11 2952 7084
Campodolcino SO 12 985 8069
Chiavenna SO 12 7379 15448
Piuro SO 13 1929 17377
Madesimo SO 13 525 17902
Samolaco SO 15 2888 20790
Livo CO 18 172 20962
Dosso del Liro CO 18 264 21226
Villa di Chiavenna SO 18 1010 22236
Peglio CO 19 167 22403
Novate Mezzola SO 19 1882 24285
Trezzone CO 19 239 24524
Montemezzo CO 19 243 24767
Vercana CO 20 757 25524
Gera Lario CO 20 1027 26551
Sorico CO 20 1246 27797

Municipalities with at least 50000 inhabitants

An earthquake occurred to
59 Km N of Como (84495 inhabitants)
66 Km NE of Varese (80799 inhabitants)
77 Km NW of Bergamo (119381 inhabitants)
82 Km NE of Gallarate (53343 inhabitants)
83 Km N of Monza (122671 inhabitants)
85 Km NE of Busto Arsizio (83106 inhabitants)
85 Km NE of Legnano (60262 inhabitants)
86 Km N of Cinisello Balsamo (75078 inhabitants)
88 Km N of Sesto San Giovanni (81608 inhabitants)
90 Km N of Rho (50434 inhabitants)
96 Km N 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 2.5
ML-VAX 1.7 		1988-10-27
14:35:35		 46.328 9.251 9 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 79899
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1988-10-27 14:35:35 ± 0.369
Latitude 46.3280 ± 0.0151
Longitude 9.2510 ± 0.0252
Depth (km) 9 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 79899

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) 2560.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 90
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
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) 0.00194
Epicentral distance of station farthest from the epicenter (degree) 0.01408
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 79899
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:15:10

ML:1.7

Field Value
Value 1.7
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 79899
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.ORO.Z. 1988-10-27T14:36:11.18 10.0 undecidable manual SN 232 1.1211 -1.55 0.1
--.BOB.Z. 1988-10-27T14:36:03.50 10.0 undecidable manual PN 175 1.5651 0.62 0.8
--.DIX.Z. 1988-10-27T14:36:00.80 10.0 undecidable manual PN 259 1.2987 1.62 0.1
--.OSS.Z. 1988-10-27T14:35:59.80 10.0 undecidable manual SG 59 0.7104 -0.3 0.6
--.ORO.Z. 1988-10-27T14:35:56.70 10.0 undecidable manual PN 232 1.1211 -0.14 1.3
--.LLS.Z. 1988-10-27T14:35:54.50 10.0 undecidable manual SG 342 0.5439 -0.33 0.6
--.MMK.Z. 1988-10-27T14:35:53.20 10.0 undecidable manual PG 253 0.9213 -0.45 1.3
--.MUO.Z. 1988-10-27T14:35:51.40 10.0 undecidable manual PG 328 0.7659 0.79 1
--.OSS.Z. 1988-10-27T14:35:49.20 10.0 undecidable manual PG 59 0.7104 -0.35 1.5
--.MDI.Z. 1988-10-27T14:35:48.54 10.0 undecidable manual PG 149 0.6327 0.37 1.5
--.VAI.Z. 1988-10-27T14:35:46.88 10.0 undecidable manual PG 216 0.5661 -0.04 1.7
--.TMA.Z. 1988-10-27T14:35:46.50 10.0 undecidable manual SG 229 0.3441 -1.8 0
--.LLS.Z. 1988-10-27T14:35:46.30 10.0 undecidable manual PG 342 0.5439 -0.2 1.7
--.VDL.Z. 1988-10-27T14:35:43.30 10.0 undecidable manual SG 43 0.2109 -0.76 0.4
--.TMA.Z. 1988-10-27T14:35:42.60 10.0 undecidable manual PG 229 0.3441 -0.13 1.7
--.VDL.Z. 1988-10-27T14:35:40.20 10.0 undecidable manual PG 43 0.2109 -0.09 1.7
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