Earthquake with magnitude of Md 2.6 on date 29-03-1986 and time 10:55:16 (Italy) in region 2 km SW Valtopina (PG)

A magnitude Md 2.6 earthquake occured in region: 2 km SW Valtopina (PG), on

  • 29-03-1986 09:55:16 (UTC)
  • 29-03-1986 10:55:16 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.04, 12.74 at 8 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
Valtopina PG 2 1398 1398
Spello PG 8 8645 10043
Nocera Umbra PG 9 5839 15882
Foligno PG 10 57155 73037
Assisi PG 11 28299 101336
Cannara PG 14 4305 105641
Bastia Umbra PG 16 21874 127515
Bevagna PG 16 5081 132596
Serravalle di Chienti MC 17 1070 133666
Valfabbrica PG 18 3389 137055
Montefalco PG 18 5679 142734
Trevi PG 18 8469 151203

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km NE of Foligno (57155 inhabitants)
30 Km E of Perugia (166134 inhabitants)
54 Km N of Terni (111501 inhabitants)
84 Km SE of Arezzo (99543 inhabitants)
87 Km NE of Viterbo (67173 inhabitants)
89 Km W of Teramo (54892 inhabitants)
90 Km SW of Ancona (100861 inhabitants)
92 Km S of Fano (60888 inhabitants)
94 Km NW of L'Aquila (69753 inhabitants)
98 Km S of Pesaro (94582 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 2.6 1986-03-29
09:55:16
43.04 12.75 7 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 25039
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-03-29 09:55:16 ± 0.155
Latitude 43.04 ± 0.01
Longitude 12.75 ± 0.02
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 25039

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) 1581.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 127
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) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00057
Epicentral distance of station farthest from the epicenter (degree) 0.00753
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 25039
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:26:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CRE.Z. 1986-03-29T09:55:44.50 10.0 undecidable manual SG 315 0.0073 -0.25 0.2
--.MNS.Z. 1986-03-29T09:55:39.80 10.0 undecidable manual SG 184 0.0059 0.05 0.6
--.ARV.Z. 1986-03-29T09:55:34.00 10.0 undecidable manual SG 17 0.0043 0.07 0.8
--.CRE.Z. 1986-03-29T09:55:32.70 10.0 undecidable manual PG 315 0.0073 0.02 1.3
--.AQU.Z. 1986-03-29T09:55:32.50 10.0 undecidable manual PG? 144 0.0075 -0.65 0
--.MNS.Z. 1986-03-29T09:55:30.00 10.0 undecidable manual PG 184 0.0059 0.21 0.8
--.ARV.Z. 1986-03-29T09:55:26.50 10.0 undecidable manual PG 17 0.0043 0.08 1.4
--.ASS.Z. 1986-03-29T09:55:18.30 10.0 positive manual PG 285 0.0006 -0.03 3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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