Earthquake with magnitude of Md 2.6 on date 07-03-1986 and time 14:22:52 (Italy) in region 4 km NW San Lorenzo Nuovo (VT)

A magnitude Md 2.6 earthquake occured in region: 4 km NW San Lorenzo Nuovo (VT), on

  • 07-03-1986 13:22:52 (UTC)
  • 07-03-1986 14:22:52 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.71, 11.87 at 11 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
San Lorenzo Nuovo VT 4 2091 2091
Grotte di Castro VT 4 2683 4774
Acquapendente VT 4 5506 10280
Onano VT 5 995 11275
Proceno VT 7 557 11832
Gradoli VT 7 1353 13185
Castel Giorgio TR 9 2131 15316
Latera VT 10 836 16152
Bolsena VT 12 3991 20143
Castel Viscardo TR 12 2938 23081
Sorano GR 13 3428 26509
Allerona TR 14 1794 28303
Valentano VT 16 2868 31171
Castell'Azzara GR 16 1476 32647
Capodimonte VT 18 1731 34378
San Casciano dei Bagni SI 18 1632 36010
Pitigliano GR 18 3818 39828
Porano TR 19 1966 41794
Orvieto TR 19 20630 62424
Marta VT 20 3499 65923

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km NW of Viterbo (67173 inhabitants)
61 Km SW of Perugia (166134 inhabitants)
62 Km E of Grosseto (82087 inhabitants)
65 Km W of Terni (111501 inhabitants)
69 Km N of Civitavecchia (52991 inhabitants)
73 Km W of Foligno (57155 inhabitants)
81 Km SE of Siena (53903 inhabitants)
85 Km S of Arezzo (99543 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 1986-03-07
13:22:52
42.71 11.87 11 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 23769
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-03-07 13:22:52 ± 0.076
Latitude 42.71 ± 0.01
Longitude 11.87 ± 0.01
Depth (km) 11 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 23769

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) 900.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
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) 0.00542
Epicentral distance of station farthest from the epicenter (degree) 0.00996
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 23769
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:25:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ASS.Z. 1986-03-07T13:23:15.50 10.0 undecidable manual SG 57 0.006 -0.31 0.1
--.ARV.Z. 1986-03-07T13:23:13.50 10.0 undecidable manual PN 43 0.01 -0.05 1
--.CRE.Z. 1986-03-07T13:23:10.50 10.0 undecidable manual PG 2 0.0082 0.13 0.9
--.MNS.Z. 1986-03-07T13:23:06.00 10.0 undecidable manual PG 117 0.0061 0.07 1.5
--.ASS.Z. 1986-03-07T13:23:05.80 10.0 undecidable manual PG 57 0.006 -0.07 1.5
--.MAO.Z. 1986-03-07T13:23:04.50 10.0 undecidable manual PG 241 0.0054 -0.11 1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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