Earthquake with magnitude of Md 2.5 on date 04-06-1986 and time 20:43:02 (Italy) in region 4 km N Posta (RI)

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

  • 04-06-1986 18:43:02 (UTC)
  • 04-06-1986 20:43:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.56, 13.1 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
Posta RI 4 694 694
Borbona RI 6 617 1311
Cittareale RI 8 482 1793
Leonessa RI 12 2435 4228
Montereale AQ 12 2581 6809
Micigliano RI 13 127 6936
Cagnano Amiterno AQ 15 1369 8305
Antrodoco RI 16 2588 10893
Monteleone di Spoleto PG 16 599 11492
Capitignano AQ 17 665 12157
Amatrice RI 17 2657 14814
Borgo Velino RI 17 972 15786
Barete AQ 19 737 16523
Poggio Bustone RI 19 2055 18578
Castel Sant'Angelo RI 19 1308 19886
Cantalice RI 19 2755 22641
Accumoli RI 19 667 23308
Cascia PG 19 3217 26525

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km NW of L'Aquila (69753 inhabitants)
38 Km E of Terni (111501 inhabitants)
50 Km W of Teramo (54892 inhabitants)
55 Km SE of Foligno (57155 inhabitants)
69 Km NE of Guidonia Montecelio (88673 inhabitants)
71 Km NE of Tivoli (56533 inhabitants)
83 Km E of Viterbo (67173 inhabitants)
84 Km SE of Perugia (166134 inhabitants)
86 Km W of Montesilvano (53738 inhabitants)
90 Km NE of Roma (2864731 inhabitants)
90 Km W of Chieti (51815 inhabitants)
92 Km W of Pescara (121014 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 1986-06-04
18:43:02
42.56 13.11 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 28659
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-06-04 18:43:02 ± 1.39
Latitude 42.56 ± 0.09
Longitude 13.11 ± 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 28659

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) 10022.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 251
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
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) 0.00267
Epicentral distance of station farthest from the epicenter (degree) 0.0089
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 2
Type of magnitude Md
Reference to an origin 28659
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:30:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SD1.Z. 1986-06-04T18:43:37.50 10.0 undecidable manual SG 148 0.0089 0.51 0.5
--.SD1.Z. 1986-06-04T18:43:22.00 10.0 undecidable manual PG 148 0.0089 -0.25 1.4
--.RDP.Z. 1986-06-04T18:43:21.00 10.0 undecidable manual PG 200 0.0076 1.47 0.3
--.MNS.Z. 1986-06-04T18:43:14.50 10.0 undecidable manual SG 241 0.0032 -1.52 0.2
--.AQU.Z. 1986-06-04T18:43:13.50 10.0 undecidable manual SG 133 0.0027 -0.28 1.1
--.MNS.Z. 1986-06-04T18:43:10.00 10.0 undecidable manual PG 241 0.0032 -0.14 2
--.AQU.Z. 1986-06-04T18:43:08.20 10.0 undecidable manual PG 133 0.0027 -0.65 1.5
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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