Earthquake with magnitude of Md 2.5 on date 18-06-1986 and time 03:50:36 (Italy) in region 4 km SW Borbona (RI)

A magnitude Md 2.5 earthquake occured in region: 4 km SW Borbona (RI), on

  • 18-06-1986 01:50:36 (UTC)
  • 18-06-1986 03:50:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.48, 13.11 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
Borbona RI 4 617 617
Posta RI 5 694 1311
Micigliano RI 5 127 1438
Antrodoco RI 7 2588 4026
Borgo Velino RI 9 972 4998
Cagnano Amiterno AQ 10 1369 6367
Castel Sant'Angelo RI 11 1308 7675
Montereale AQ 13 2581 10256
Leonessa RI 15 2435 12691
Barete AQ 15 737 13428
Cittareale RI 16 482 13910
Pizzoli AQ 16 4326 18236
Cittaducale RI 17 6828 25064
Cantalice RI 17 2755 27819
Capitignano AQ 17 665 28484
Scoppito AQ 17 3727 32211
Poggio Bustone RI 18 2055 34266
Concerviano RI 20 291 34557

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km NW of L'Aquila (69753 inhabitants)
39 Km E of Terni (111501 inhabitants)
53 Km W of Teramo (54892 inhabitants)
62 Km NE of Guidonia Montecelio (88673 inhabitants)
62 Km SE of Foligno (57155 inhabitants)
63 Km NE of Tivoli (56533 inhabitants)
82 Km E of Viterbo (67173 inhabitants)
83 Km NE of Roma (2864731 inhabitants)
86 Km W of Montesilvano (53738 inhabitants)
88 Km W of Chieti (51815 inhabitants)
91 Km W of Pescara (121014 inhabitants)
91 Km SE of Perugia (166134 inhabitants)
92 Km N of Velletri (53303 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 2.5 1986-06-18
01:50:36
42.48 13.11 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 29599
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-06-18 01:50:36 ± 0.36
Latitude 42.48 ± 0.03
Longitude 13.11 ± 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 29599

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) 3650.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 133
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) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00227
Epicentral distance of station farthest from the epicenter (degree) 0.00915
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:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 29599
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:30:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1986-06-18T01:51:10.00 10.0 undecidable manual SG 353 0.0091 -0.91 0.6
--.ASS.Z. 1986-06-18T01:51:01.00 10.0 undecidable manual SG 330 0.006 1.47 0.2
--.ARV.Z. 1986-06-18T01:50:58.00 10.0 undecidable manual PG? 353 0.0091 1.8 0.1
--.ASS.Z. 1986-06-18T01:50:49.00 10.0 undecidable manual PG 330 0.006 -0.63 1.6
--.MNS.Z. 1986-06-18T01:50:49.00 10.0 undecidable manual SG 253 0.0029 0.44 0.8
--.AQU.Z. 1986-06-18T01:50:47.00 10.0 undecidable manual SG 120 0.0023 0.86 0.5
--.MNS.Z. 1986-06-18T01:50:43.00 10.0 undecidable manual PG 253 0.0029 -0.3 2.2
--.AQU.Z. 1986-06-18T01:50:41.50 10.0 undecidable manual PG 120 0.0023 -0.4 2.1
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