Earthquake with magnitude of Md 3.0 on date 21-09-1986 and time 20:01:15 (Italy) in region 2 km SE Borbona (RI)

A magnitude Md 3.0 earthquake occured in region: 2 km SE Borbona (RI), on

  • 21-09-1986 18:01:15 (UTC)
  • 21-09-1986 20:01:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5, 13.15 at 5 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 2 617 617
Posta RI 5 694 1311
Cagnano Amiterno AQ 8 1369 2680
Montereale AQ 8 2581 5261
Micigliano RI 10 127 5388
Antrodoco RI 11 2588 7976
Barete AQ 12 737 8713
Capitignano AQ 12 665 9378
Cittareale RI 13 482 9860
Borgo Velino RI 13 972 10832
Pizzoli AQ 14 4326 15158
Castel Sant'Angelo RI 16 1308 16466
Leonessa RI 17 2435 18901
Scoppito AQ 17 3727 22628
Amatrice RI 18 2657 25285
Campotosto AQ 19 542 25827

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km NW of L'Aquila (69753 inhabitants)
42 Km E of Terni (111501 inhabitants)
48 Km W of Teramo (54892 inhabitants)
62 Km SE of Foligno (57155 inhabitants)
66 Km NE of Guidonia Montecelio (88673 inhabitants)
67 Km NE of Tivoli (56533 inhabitants)
82 Km W of Montesilvano (53738 inhabitants)
85 Km W of Chieti (51815 inhabitants)
87 Km E of Viterbo (67173 inhabitants)
87 Km W of Pescara (121014 inhabitants)
88 Km NE of Roma (2864731 inhabitants)
92 Km SE of Perugia (166134 inhabitants)
96 Km NE 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 3.0 1986-09-21
18:01:15
42.51 13.15 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 34439
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-09-21 18:01:15 ± 0.251
Latitude 42.51 ± 0.02
Longitude 13.15 ± 0.04
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 34439

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) 3606.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
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) 0.0021
Epicentral distance of station farthest from the epicenter (degree) 0.03545
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

Md:3

Field Value
Value 3
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 34439
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:34:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.RBL.Z. 1986-09-21T18:02:17.50 10.0 undecidable manual PN 4 0.0355 1.14 0.6
--.CTI.Z. 1986-09-21T18:02:13.00 10.0 undecidable manual PN 343 0.0333 -0.01 1.1
--.BDI.Z. 1986-09-21T18:01:56.50 10.0 undecidable manual PN 310 0.0218 1 0.8
--.ARV.Z. 1986-09-21T18:01:51.00 10.0 undecidable manual SG 351 0.009 0.5 0.8
--.SD1.Z. 1986-09-21T18:01:48.50 10.0 undecidable manual SG 148 0.0083 0.31 1.1
--.RMP.Z. 1986-09-21T18:01:43.50 10.0 undecidable manual SG 206 0.0069 0.55 0.6
--.CRE.Z. 1986-09-21T18:01:42.50 10.0 undecidable manual PN 322 0.0127 0.82 1.4
--.ASS.Z. 1986-09-21T18:01:41.00 10.0 undecidable manual SG 326 0.006 1.34 0.3
--.DUI.Z. 1986-09-21T18:01:41.00 10.0 undecidable manual PN 130 0.0115 1.14 1
--.AM8.Z. 1986-09-21T18:01:35.54 10.0 undecidable manual PN 17 0.0098 -1.68 0.5
--.SD1.Z. 1986-09-21T18:01:34.00 10.0 undecidable manual PG 148 0.0083 -0.32 2
--.ARV.Z. 1986-09-21T18:01:34.50 10.0 undecidable manual PG 351 0.009 -1.16 1
--.RMP.Z. 1986-09-21T18:01:29.50 10.0 undecidable manual PG 206 0.0069 -1.8 0.6
--.ASS.Z. 1986-09-21T18:01:28.50 10.0 undecidable manual PG 326 0.006 -0.89 1.4
--.AQU.Z. 1986-09-21T18:01:25.00 10.0 undecidable manual SG 129 0.0021 0.3 0.8
--.AQU.Z. 1986-09-21T18:01:20.50 10.0 undecidable manual PG 129 0.0021 -0.26 2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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