Earthquake with magnitude of Md 2.0 on date 15-04-1987 and time 14:46:03 (Italy) in region 3 km E Pietralunga (PG)

A magnitude Md 2.0 earthquake occured in region: 3 km E Pietralunga (PG), on

  • 15-04-1987 12:46:03 (UTC)
  • 15-04-1987 14:46:03 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.44, 12.48 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
Pietralunga PG 3 2111 2111
Gubbio PG 12 32216 34327
Cantiano PU 13 2245 36572
Apecchio PU 14 1882 38454
Montone PG 15 1680 40134
Scheggia e Pascelupo PG 16 1393 41527
Piobbico PU 17 2029 43556
Cagli PU 18 8731 52287
Umbertide PG 19 16681 68968
CittĂ  di Castello PG 20 39913 108881

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km N of Perugia (166134 inhabitants)
48 Km E of Arezzo (99543 inhabitants)
57 Km NW of Foligno (57155 inhabitants)
63 Km SW of Fano (60888 inhabitants)
63 Km SW of Pesaro (94582 inhabitants)
70 Km S of Rimini (147750 inhabitants)
80 Km S of Cesena (96758 inhabitants)
86 Km W of Ancona (100861 inhabitants)
94 Km E of Siena (53903 inhabitants)
94 Km SE of Forlì (117913 inhabitants)
98 Km N of Terni (111501 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 1987-04-15
12:46:03
43.44 12.48 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 44889
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-04-15 12:46:03 ± 0.363
Latitude 43.44 ± 0.01
Longitude 12.48 ± 0.03
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 44889

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) 2455.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 278
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) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00308
Epicentral distance of station farthest from the epicenter (degree) 0.00486
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information

Md:2

Field Value
Value 2
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 44889
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:44:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CM8.Z. 1987-04-15T12:46:22.65 10.0 undecidable manual SG 116 0.0049 0.33 0.1
--.ASS.Z. 1987-04-15T12:46:17.50 10.0 undecidable manual SG 161 0.0036 -0.17 0.5
--.ARV.Z. 1987-04-15T12:46:15.60 10.0 undecidable manual SG 79 0.0031 -0.33 0.2
--.CM8.Z. 1987-04-15T12:46:14.25 10.0 undecidable manual PG 116 0.0049 0.09 1.6
--.ASS.Z. 1987-04-15T12:46:11.40 10.0 undecidable manual PG 161 0.0036 -0.08 1.8
--.ARV.Z. 1987-04-15T12:46:10.60 10.0 undecidable manual PG 79 0.0031 0.12 1.6
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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