Earthquake with magnitude of Md 2.3 on date 07-02-1986 and time 22:14:31 (Italy) in region 4 km NW Posta (RI)

A magnitude Md 2.3 earthquake occured in region: 4 km NW Posta (RI), on

  • 07-02-1986 21:14:31 (UTC)
  • 07-02-1986 22:14:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.55, 13.06 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
Posta RI 4 694 694
Borbona RI 7 617 1311
Leonessa RI 8 2435 3746
Micigliano RI 11 127 3873
Cittareale RI 11 482 4355
Monteleone di Spoleto PG 15 599 4954
Antrodoco RI 15 2588 7542
Montereale AQ 15 2581 10123
Poggio Bustone RI 15 2055 12178
Cantalice RI 16 2755 14933
Borgo Velino RI 16 972 15905
Cagnano Amiterno AQ 17 1369 17274
Rivodutri RI 17 1253 18527
Castel Sant'Angelo RI 17 1308 19835
Polino TR 18 233 20068
Morro Reatino RI 19 373 20441
Cascia PG 19 3217 23658
Capitignano AQ 20 665 24323

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Terni (111501 inhabitants)
35 Km NW of L'Aquila (69753 inhabitants)
54 Km SE of Foligno (57155 inhabitants)
54 Km W of Teramo (54892 inhabitants)
67 Km NE of Guidonia Montecelio (88673 inhabitants)
69 Km NE of Tivoli (56533 inhabitants)
80 Km E of Viterbo (67173 inhabitants)
83 Km SE of Perugia (166134 inhabitants)
87 Km NE of Roma (2864731 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
93 Km W of Chieti (51815 inhabitants)
95 Km W of Pescara (121014 inhabitants)
99 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 2.3 1986-02-07
21:14:31
42.55 13.06 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 22279
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-02-07 21:14:31 ± 0.258
Latitude 42.55 ± 0.01
Longitude 13.06 ± 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 22279

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) 2662.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 122
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
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) 0.00283
Epicentral distance of station farthest from the epicenter (degree) 0.0085
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 22279
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:24:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1986-02-07T21:15:05.00 10.0 undecidable manual SG 355 0.0085 0.7 0.3
--.CM8.Z. 1986-02-07T21:14:55.00 10.0 undecidable manual SG 5 0.0057 0.5 0.7
--.ASS.Z. 1986-02-07T21:14:53.50 10.0 undecidable manual SG 329 0.0053 0.71 0.4
--.ARV.Z. 1986-02-07T21:14:50.00 10.0 undecidable manual PG 355 0.0085 -0.56 0.9
--.CM8.Z. 1986-02-07T21:14:44.00 10.0 undecidable manual PG 5 0.0057 -0.91 0.6
--.ASS.Z. 1986-02-07T21:14:44.00 10.0 undecidable manual PG 329 0.0053 0.08 1.8
--.MNS.Z. 1986-02-07T21:14:43.00 10.0 undecidable manual SG 239 0.0029 -1.2 0.2
--.MNS.Z. 1986-02-07T21:14:39.50 10.0 positive manual PG 239 0.0029 0.53 2.5
--.AQU.Z. 1986-02-07T21:14:39.00 10.0 undecidable manual PG 128 0.0028 0.19 1.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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