Earthquake with magnitude of Md 2.7 on date 16-10-1986 and time 13:44:55 (Italy) in region 7 km W Montemonaco (AP)

A magnitude Md 2.7 earthquake occured in region: 7 km W Montemonaco (AP), on

  • 16-10-1986 12:44:55 (UTC)
  • 16-10-1986 13:44:55 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.92, 13.24 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
Montemonaco AP 7 604 604
Castelsantangelo sul Nera MC 8 281 885
Montefortino FM 9 1178 2063
Bolognola MC 9 142 2205
Ussita MC 9 444 2649
Montegallo AP 11 523 3172
Amandola FM 12 3629 6801
Visso MC 13 1107 7908
Acquacanina MC 14 121 8029
Sarnano MC 14 3264 11293
Comunanza AP 15 3166 14459
Fiastra MC 15 559 15018
Arquata del Tronto AP 17 1178 16196
Preci PG 17 724 16920
Palmiano AP 18 196 17116
Fiordimonte MC 18 202 17318
Norcia PG 18 4957 22275
Gualdo MC 19 815 23090
Smerillo FM 19 365 23455
Montefalcone Appennino FM 19 424 23879
Roccafluvione AP 20 2010 25889

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km E of Foligno (57155 inhabitants)
47 Km NW of Teramo (54892 inhabitants)
63 Km NE of Terni (111501 inhabitants)
64 Km N of L'Aquila (69753 inhabitants)
73 Km E of Perugia (166134 inhabitants)
81 Km S of Ancona (100861 inhabitants)
87 Km NW of Montesilvano (53738 inhabitants)
94 Km NW of Pescara (121014 inhabitants)
98 Km NW of Chieti (51815 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
Bulletin
Rev1000
Md 2.7 1986-10-16
12:44:55
42.92 13.24 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 35989
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-10-16 12:44:55 ± 0.369
Latitude 42.92 ± 0.02
Longitude 13.24 ± 0.04
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 35989

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) 4049.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 181
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) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00405
Epicentral distance of station farthest from the epicenter (degree) 0.01149
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 35989
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:36:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SD1.Z. 1986-10-16T12:45:35.00 10.0 undecidable manual SN 160 0.0115 -1.32 0.1
--.SD1.Z. 1986-10-16T12:45:20.50 10.0 undecidable manual PN 160 0.0115 1.46 0.1
--.ARV.Z. 1986-10-16T12:45:17.50 10.0 undecidable manual SG 339 0.0056 0.2 0.8
--.AQU.Z. 1986-10-16T12:45:16.00 10.0 undecidable manual SG 167 0.0051 0.19 0.5
--.ASS.Z. 1986-10-16T12:45:11.50 10.0 undecidable manual SG 288 0.004 -0.49 0.6
--.ARV.Z. 1986-10-16T12:45:07.80 10.0 negative manual PG 339 0.0056 -0.26 2.4
--.AQU.Z. 1986-10-16T12:45:06.80 10.0 undecidable manual PG 167 0.0051 -0.4 1.1
--.ASS.Z. 1986-10-16T12:45:05.30 10.0 positive manual PG 288 0.004 0.3 2.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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