Earthquake with magnitude of Md 2.7 on date 24-04-1987 and time 07:17:42 (Italy) in region Confine Italia Svizzera (SVIZZERA)

A magnitude Md 2.7 earthquake occured in region: Confine Italia Svizzera (SVIZZERA), on

  • 24-04-1987 05:17:42 (UTC)
  • 24-04-1987 07:17:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.13, 7.64 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
98 Km W of Varese (80799 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 Md 2.7 1987-04-24
05:17:42
46.13 7.65 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 45519
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-04-24 05:17:42 ± 0.161
Latitude 46.13 ± 0.01
Longitude 7.65 ± 0.02
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 45519

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) 1782.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 46
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00146
Epicentral distance of station farthest from the epicenter (degree) 0.03384
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 27
Magnitude information

Md:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 45519
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:44:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.TCF.Z. 1987-04-24T05:18:41.20 10.0 undecidable manual PN 274 0.0338 0.05 0.9
--.BSF.Z. 1987-04-24T05:18:35.70 10.0 undecidable manual SN 341 0.0161 -1.51 0.1
--.DA9.Z. 1987-04-24T05:18:33.00 10.0 undecidable manual SN 189 0.0148 -0.8 0.4
--.SSF.Z. 1987-04-24T05:18:32.00 10.0 undecidable manual PN 289 0.0269 1.44 0.2
--.AVF.Z. 1987-04-24T05:18:30.90 10.0 undecidable manual PN 283 0.0272 -0.17 1.1
--.LOR.Z. 1987-04-24T05:18:29.60 10.0 undecidable manual PN 294 0.0254 1.2 0.3
--.BNI.Z. 1987-04-24T05:18:26.00 10.0 undecidable manual SN 212 0.0114 1.19 0.2
--.RSP.Z. 1987-04-24T05:18:17.50 10.0 undecidable manual SG 195 0.0091 -0.7 0.5
--.ROB.Z. 1987-04-24T05:18:15.00 10.0 undecidable manual PN 174 0.0165 0.27 1.4
--.OSS.Z. 1987-04-24T05:18:15.70 10.0 undecidable manual PN 71 0.0163 1.35 0.3
--.STV.Z. 1987-04-24T05:18:15.50 10.0 undecidable manual PN 186 0.017 -0.01 1.5
--.BSF.Z. 1987-04-24T05:18:14.20 10.0 undecidable manual PN 341 0.0161 0.03 1.5
--.DA9.Z. 1987-04-24T05:18:13.50 10.0 undecidable manual PN 189 0.0148 1.3 0.4
--.MOF.Z. 1987-04-24T05:18:13.60 10.0 undecidable manual PN 348 0.0157 0.01 1.5
--.SOO.Z. 1987-04-24T05:18:13.30 10.0 undecidable manual PN 193 0.015 0.84 0.9
--.CKI.Z. 1987-04-24T05:18:13.20 10.0 undecidable manual PN 165 0.0159 -0.61 1.1
--.SAX.Z. 1987-04-24T05:18:12.10 10.0 undecidable manual PN 45 0.0145 0.41 1.4
--.ROF.Z. 1987-04-24T05:18:11.60 10.0 undecidable manual PN 341 0.0147 -0.28 1.5
--.VAI.Z. 1987-04-24T05:18:11.50 10.0 undecidable manual SG 108 0.0074 -0.56 0.5
--.SLE.Z. 1987-04-24T05:18:11.90 10.0 undecidable manual PN 19 0.0155 -1.4 0.3
--.LSD.Z. 1987-04-24T05:18:09.60 10.0 undecidable manual SG 206 0.0068 -0.21 0.7
--.RRL.Z. 1987-04-24T05:18:08.00 10.0 undecidable manual PN 206 0.0121 -0.1 1.7
--.BNI.Z. 1987-04-24T05:18:07.50 10.0 undecidable manual PN 212 0.0114 0.49 1.4
--.ORX.Z. 1987-04-24T05:18:03.20 10.0 undecidable manual SG 154 0.0049 -0.07 0.7
--.RSP.Z. 1987-04-24T05:18:03.20 10.0 undecidable manual PG 195 0.0091 0.01 1.7
--.ORO.Z. 1987-04-24T05:18:02.50 10.0 undecidable manual SG 154 0.0049 -0.91 0.3
--.LPG.Z. 1987-04-24T05:18:00.00 10.0 undecidable manual PG 224 0.0079 -0.81 1
--.VAI.Z. 1987-04-24T05:18:00.20 10.0 undecidable manual PG 108 0.0074 0.56 1.3
--.TMA.Z. 1987-04-24T05:17:58.90 10.0 undecidable manual PG 91 0.0076 -1.22 0.5
--.LSD.Z. 1987-04-24T05:17:57.70 10.0 undecidable manual PG 206 0.0068 -0.64 1.2
--.ORO.Z. 1987-04-24T05:17:54.50 10.0 undecidable manual PG 154 0.0049 -0.15 1.7
--.ORX.Z. 1987-04-24T05:17:54.90 10.0 undecidable manual PG 154 0.0049 0.33 1.6
--.EMS.Z. 1987-04-24T05:17:52.00 10.0 undecidable manual PG 262 0.0045 -1.58 0.2
--.MMK.Z. 1987-04-24T05:17:48.10 10.0 undecidable manual PG 109 0.0021 0.07 1.7
--.DIX.Z. 1987-04-24T05:17:46.60 10.0 positive manual PG 252 0.0015 0 3.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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