Earthquake with magnitude of Md 2.6 on date 14-09-1986 and time 23:33:55 (Italy) in region 4 km NW Baschi (TR)

A magnitude Md 2.6 earthquake occured in region: 4 km NW Baschi (TR), on

  • 14-09-1986 21:33:55 (UTC)
  • 14-09-1986 23:33:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7, 12.18 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
Baschi TR 4 2722 2722
Castiglione in Teverina VT 6 2329 5051
Orvieto TR 7 20630 25681
Porano TR 7 1966 27647
Montecchio TR 10 1676 29323
Lubriano VT 10 909 30232
Civitella d'Agliano VT 11 1640 31872
Bagnoregio VT 11 3650 35522
Guardea TR 13 1836 37358
Graffignano VT 14 2292 39650
Alviano TR 16 1463 41113
Castel Viscardo TR 16 2938 44051
Celleno VT 16 1355 45406
Castel Giorgio TR 17 2131 47537
Bolsena VT 17 3991 51528
Ficulle TR 18 1669 53197
Lugnano in Teverina TR 19 1494 54691
Parrano TR 19 534 55225
San Venanzo TR 20 2218 57443

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km N of Viterbo (67173 inhabitants)
41 Km W of Terni (111501 inhabitants)
48 Km SW of Perugia (166134 inhabitants)
51 Km SW of Foligno (57155 inhabitants)
75 Km NE of Civitavecchia (52991 inhabitants)
88 Km E of Grosseto (82087 inhabitants)
89 Km S of Arezzo (99543 inhabitants)
90 Km NW of Guidonia Montecelio (88673 inhabitants)
93 Km N of Roma (2864731 inhabitants)
96 Km NW of Tivoli (56533 inhabitants)
98 Km SE of Siena (53903 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 1986-09-14
21:33:55
42.7 12.19 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 34089
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-09-14 21:33:55 ± 0.395
Latitude 42.70 ± 0.03
Longitude 12.19 ± 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 34089

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) 4029.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 138
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00445
Epicentral distance of station farthest from the epicenter (degree) 0.00866
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 4
Type of magnitude Md
Reference to an origin 34089
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:34:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CRE.Z. 1986-09-14T21:34:28.50 10.0 undecidable manual SG 349 0.0083 1.15 0.4
--.ARV.Z. 1986-09-14T21:34:28.00 10.0 undecidable manual SG 34 0.0087 -0.55 0.7
--.MAO.Z. 1986-09-14T21:34:24.00 10.0 undecidable manual SG 250 0.0073 0.57 0.7
--.AQU.Z. 1986-09-14T21:34:15.50 10.0 undecidable manual PG 111 0.0086 1.08 1
--.ARV.Z. 1986-09-14T21:34:14.00 10.0 undecidable manual PG 34 0.0087 -0.58 1.7
--.ASS.Z. 1986-09-14T21:34:14.00 10.0 undecidable manual SG 43 0.0045 0.64 0.9
--.CRE.Z. 1986-09-14T21:34:14.50 10.0 undecidable manual PG 349 0.0083 0.61 1.5
--.MAO.Z. 1986-09-14T21:34:11.00 10.0 undecidable manual PG 250 0.0073 -0.63 1.7
--.ASS.Z. 1986-09-14T21:34:04.00 10.0 undecidable manual PG 43 0.0045 -1.8 0.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download