Earthquake with magnitude of Md 2.0 on date 17-04-1987 and time 06:53:49 (Italy) in region 2 km E Sigillo (PG)

A magnitude Md 2.0 earthquake occured in region: 2 km E Sigillo (PG), on

  • 17-04-1987 04:53:49 (UTC)
  • 17-04-1987 06:53:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.33, 12.77 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
Sigillo PG 3 2404 2404
Fossato di Vico PG 4 2840 5244
Costacciaro PG 6 1216 6460
Fabriano AN 11 31480 37940
Gualdo Tadino PG 11 15208 53148
Scheggia e Pascelupo PG 12 1393 54541
Sassoferrato AN 14 7285 61826
Gubbio PG 16 32216 94042
Esanatoglia MC 17 2034 96076
Genga AN 17 1797 97873
Cerreto d'Esi AN 17 3817 101690
Serra Sant'Abbondio PU 18 1027 102717
Cantiano PU 20 2245 104962

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km NE of Perugia (166134 inhabitants)
42 Km N of Foligno (57155 inhabitants)
60 Km SW of Fano (60888 inhabitants)
65 Km S of Pesaro (94582 inhabitants)
68 Km W of Ancona (100861 inhabitants)
73 Km E of Arezzo (99543 inhabitants)
83 Km S of Rimini (147750 inhabitants)
86 Km N of Terni (111501 inhabitants)
99 Km SE of Cesena (96758 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 2.0 1987-04-17
04:53:49
43.33 12.77 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 45009
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-04-17 04:53:49 ± 0.35
Latitude 43.33 ± 0.02
Longitude 12.77 ± 0.04
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 45009

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) 3616.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 199
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
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) 0.00186
Epicentral distance of station farthest from the epicenter (degree) 0.00575
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2

Field Value
Value 2
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 45009
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:44:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AM8.Z. 1987-04-17T04:54:12.41 10.0 undecidable manual SG 70 0.0057 0.92 0.2
--.AM8.Z. 1987-04-17T04:54:03.32 10.0 undecidable manual PG 70 0.0057 1.31 0.2
--.CM8.Z. 1987-04-17T04:54:00.10 10.0 undecidable manual SG 117 0.0027 -0.63 0.5
--.ASS.Z. 1987-04-17T04:54:00.00 10.0 undecidable manual SG 198 0.0025 -0.11 0.7
--.ARV.Z. 1987-04-17T04:53:57.30 10.0 undecidable manual SG 37 0.0019 -0.33 0.9
--.CM8.Z. 1987-04-17T04:53:55.80 10.0 undecidable manual PG 117 0.0027 -0.72 1
--.ASS.Z. 1987-04-17T04:53:55.80 10.0 undecidable manual PG 198 0.0025 0.36 1.5
--.ARV.Z. 1987-04-17T04:53:53.60 10.0 negative manual PG 37 0.0019 -0.41 2.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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