Earthquake with magnitude of Md 3.0 on date 28-03-1986 and time 17:41:45 (Italy) in region 5 km W Valtopina (PG)

A magnitude Md 3.0 earthquake occured in region: 5 km W Valtopina (PG), on

  • 28-03-1986 16:41:45 (UTC)
  • 28-03-1986 17:41:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.06, 12.69 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
Valtopina PG 5 1398 1398
Assisi PG 6 28299 29697
Spello PG 8 8645 38342
Nocera Umbra PG 10 5839 44181
Bastia Umbra PG 11 21874 66055
Cannara PG 11 4305 70360
Foligno PG 12 57155 127515
Valfabbrica PG 13 3389 130904
Bevagna PG 16 5081 135985
Bettona PG 18 4367 140352
Montefalco PG 19 5679 146031

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km N of Foligno (57155 inhabitants)
25 Km E of Perugia (166134 inhabitants)
56 Km N of Terni (111501 inhabitants)
79 Km SE of Arezzo (99543 inhabitants)
86 Km NE of Viterbo (67173 inhabitants)
91 Km SW of Fano (60888 inhabitants)
91 Km SW of Ancona (100861 inhabitants)
94 Km W of Teramo (54892 inhabitants)
96 Km S of Pesaro (94582 inhabitants)
98 Km NW of L'Aquila (69753 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 3.0 1986-03-28
16:41:45
43.06 12.69 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 25019
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-03-28 16:41:45 ± 0.056
Latitude 43.06 ± 0.00
Longitude 12.69 ± 0.01
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 25019

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) 983.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 120
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
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) 0.00024
Epicentral distance of station farthest from the epicenter (degree) 0.00785
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:3

Field Value
Value 3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 25019
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:26:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MNS.Z. 1986-03-28T16:42:09.50 10.0 undecidable manual SG 180 0.0061 0.25 0.1
--.AQU.Z. 1986-03-28T16:42:03.00 10.0 undecidable manual PG 143 0.0079 0.04 1.1
--.ARV.Z. 1986-03-28T16:42:02.50 10.0 undecidable manual SG 22 0.0042 -0.16 0.2
--.CRE.Z. 1986-03-28T16:42:01.00 10.0 undecidable manual PG 316 0.007 0.02 1.3
--.MNS.Z. 1986-03-28T16:41:59.00 10.0 undecidable manual PG 180 0.0061 -0.2 0.3
--.ARV.Z. 1986-03-28T16:41:55.50 10.0 undecidable manual PG 22 0.0042 0.1 1
--.ASS.Z. 1986-03-28T16:41:47.50 10.0 positive manual PG 268 0.0002 0 3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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