Earthquake with magnitude of Md 2.4 on date 17-01-1986 and time 03:26:36 (Italy) in region 3 km NW Arquata del Tronto (AP)

A magnitude Md 2.4 earthquake occured in region: 3 km NW Arquata del Tronto (AP), on

  • 17-01-1986 02:26:36 (UTC)
  • 17-01-1986 03:26:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8, 13.27 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
Arquata del Tronto AP 3 1178 1178
Montegallo AP 7 523 1701
Accumoli RI 12 667 2368
Acquasanta Terme AP 12 2916 5284
Montemonaco AP 12 604 5888
Castelsantangelo sul Nera MC 15 281 6169
Norcia PG 15 4957 11126
Montefortino FM 17 1178 12304
Roccafluvione AP 18 2010 14314
Amatrice RI 19 2657 16971
Palmiano AP 19 196 17167
Ussita MC 20 444 17611
Valle Castellana TE 20 977 18588

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km W of Teramo (54892 inhabitants)
50 Km E of Foligno (57155 inhabitants)
51 Km N of L'Aquila (69753 inhabitants)
58 Km E of Terni (111501 inhabitants)
78 Km W of Montesilvano (53738 inhabitants)
80 Km E of Perugia (166134 inhabitants)
85 Km W of Pescara (121014 inhabitants)
89 Km NW of Chieti (51815 inhabitants)
93 Km S of Ancona (100861 inhabitants)
99 Km NE of Guidonia Montecelio (88673 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 2.4 1986-01-17
02:26:36
42.8 13.27 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 20779
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-01-17 02:26:36 ± 0.336
Latitude 42.80 ± 0.01
Longitude 13.27 ± 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 20779

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) 3073.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 186
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) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00405
Epicentral distance of station farthest from the epicenter (degree) 0.00664
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:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 20779
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:23:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1986-01-17T02:27:03.00 10.0 undecidable manual SG 341 0.0066 0.99 0.2
--.MNS.Z. 1986-01-17T02:26:58.00 10.0 undecidable manual SG 226 0.0053 0.5 0.8
--.AQU.Z. 1986-01-17T02:26:53.00 10.0 undecidable manual SG 167 0.004 0.21 1.1
--.ARV.Z. 1986-01-17T02:26:50.50 10.0 undecidable manual PG 341 0.0066 -0.65 0.9
--.MNS.Z. 1986-01-17T02:26:48.00 10.0 undecidable manual PG 226 0.0053 -0.55 1.2
--.AQU.Z. 1986-01-17T02:26:46.00 10.0 undecidable manual PG 167 0.004 0.17 1.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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