Earthquake with magnitude of Md 2.1 on date 12-03-1986 and time 09:09:03 (Italy) in region 3 km E Trevi (PG)

A magnitude Md 2.1 earthquake occured in region: 3 km E Trevi (PG), on

  • 12-03-1986 08:09:03 (UTC)
  • 12-03-1986 09:09:03 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.88, 12.78 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
Trevi PG 3 8469 8469
Campello sul Clitunno PG 6 2442 10911
Castel Ritaldi PG 11 3278 14189
Montefalco PG 11 5679 19868
Foligno PG 11 57155 77023
Sellano PG 12 1079 78102
Cerreto di Spoleto PG 13 1075 79177
Vallo di Nera PG 14 364 79541
Bevagna PG 15 5081 84622
Spello PG 16 8645 93267
Spoleto PG 16 38218 131485
Sant'Anatolia di Narco PG 16 564 132049
Giano dell'Umbria PG 17 3846 135895
Scheggino PG 19 461 136356
Gualdo Cattaneo PG 19 6155 142511

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km SE of Foligno (57155 inhabitants)
37 Km NE of Terni (111501 inhabitants)
41 Km SE of Perugia (166134 inhabitants)
75 Km NE of Viterbo (67173 inhabitants)
77 Km NW of L'Aquila (69753 inhabitants)
79 Km W of Teramo (54892 inhabitants)
97 Km N of Guidonia Montecelio (88673 inhabitants)
98 Km SE 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 2.1 1986-03-12
08:09:03
42.88 12.78 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 24029
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-03-12 08:09:03 ± 0.306
Latitude 42.88 ± 0.01
Longitude 12.78 ± 0.06
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 24029

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) 5086.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 177
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00186
Epicentral distance of station farthest from the epicenter (degree) 0.00567
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:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 24029
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:25:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1986-03-12T08:09:27.00 10.0 undecidable manual SG 10 0.0057 0.98 0.1
--.MNS.Z. 1986-03-12T08:09:21.50 10.0 undecidable manual SG 188 0.0045 -0.1 0.8
--.ARV.Z. 1986-03-12T08:09:16.00 10.0 undecidable manual PG 10 0.0057 -0.61 0.8
--.MNS.Z. 1986-03-12T08:09:14.20 10.0 undecidable manual PG 188 0.0045 0.14 1.9
--.ASS.Z. 1986-03-12T08:09:12.00 10.0 undecidable manual SG 333 0.0019 -0.38 0.6
--.ASS.Z. 1986-03-12T08:09:09.00 10.0 undecidable manual PG 333 0.0019 0.27 1.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download