Earthquake with magnitude of Md 2.5 on date 03-02-1986 and time 13:00:50 (Italy) in region 5 km N Cittaducale (RI)

A magnitude Md 2.5 earthquake occured in region: 5 km N Cittaducale (RI), on

  • 03-02-1986 12:00:50 (UTC)
  • 03-02-1986 13:00:50 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.43, 12.94 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
Cittaducale RI 5 6828 6828
Cantalice RI 5 2755 9583
Rieti RI 7 47698 57281
Castel Sant'Angelo RI 8 1308 58589
Poggio Bustone RI 9 2055 60644
Micigliano RI 10 127 60771
Borgo Velino RI 10 972 61743
Antrodoco RI 12 2588 64331
Rivodutri RI 12 1253 65584
Concerviano RI 12 291 65875
Belmonte in Sabina RI 13 636 66511
Morro Reatino RI 14 373 66884
Greccio RI 14 1558 68442
Contigliano RI 14 3783 72225
Leonessa RI 15 2435 74660
Colli sul Velino RI 15 533 75193
Labro RI 16 374 75567
Posta RI 17 694 76261
Rocca Sinibalda RI 17 815 77076
Monte San Giovanni in Sabina RI 17 714 77790
Longone Sabino RI 18 597 78387
Borbona RI 18 617 79004
Petrella Salto RI 18 1197 80201
Polino TR 19 233 80434
Montenero Sabino RI 20 299 80733
Torricella in Sabina RI 20 1342 82075

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km SE of Terni (111501 inhabitants)
39 Km W of L'Aquila (69753 inhabitants)
51 Km NE of Guidonia Montecelio (88673 inhabitants)
53 Km N of Tivoli (56533 inhabitants)
62 Km SE of Foligno (57155 inhabitants)
68 Km W of Teramo (54892 inhabitants)
69 Km E of Viterbo (67173 inhabitants)
71 Km NE of Roma (2864731 inhabitants)
84 Km N of Velletri (53303 inhabitants)
88 Km SE of Perugia (166134 inhabitants)
92 Km NE of Pomezia (62966 inhabitants)
93 Km NE of Fiumicino (78395 inhabitants)
96 Km N of Aprilia (73446 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 1986-02-03
12:00:50
42.43 12.94 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 21989
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-02-03 12:00:50 ± 0.431
Latitude 42.43 ± 0.04
Longitude 12.94 ± 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 21989

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) 4988.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
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) 1
Epicentral distance of station closest to the epicenter (degree) 0.0017
Epicentral distance of station farthest from the epicenter (degree) 0.00955
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:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 21989
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:24:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1986-02-03T12:01:27.50 10.0 undecidable manual SN 359 0.0096 0.76 0.4
--.SD1.Z. 1986-02-03T12:01:11.00 10.0 undecidable manual PG 137 0.0087 1.13 0.8
--.ARV.Z. 1986-02-03T12:01:10.50 10.0 undecidable manual PN 359 0.0096 -1.07 0.8
--.ASS.Z. 1986-02-03T12:01:05.50 10.0 undecidable manual PG 341 0.006 1.18 0.9
--.AQU.Z. 1986-02-03T12:01:05.50 10.0 undecidable manual SG 102 0.0031 1.54 0.4
--.MNS.Z. 1986-02-03T12:00:59.50 10.0 undecidable manual SG 256 0.0017 0.39 0.9
--.AQU.Z. 1986-02-03T12:00:56.50 10.0 positive manual PG 102 0.0031 -1.92 0.9
--.MNS.Z. 1986-02-03T12:00:55.20 10.0 negative manual PG 256 0.0017 -0.42 2.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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