Earthquake with magnitude of Md 2.6 on date 27-12-1986 and time 01:50:30 (Italy) in region 3 km SE Cittaducale (RI)

A magnitude Md 2.6 earthquake occured in region: 3 km SE Cittaducale (RI), on

  • 27-12-1986 00:50:30 (UTC)
  • 27-12-1986 01:50:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.37, 12.98 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
Cittaducale RI 3 6828 6828
Concerviano RI 5 291 7119
Castel Sant'Angelo RI 6 1308 8427
Borgo Velino RI 8 972 9399
Belmonte in Sabina RI 9 636 10035
Rieti RI 10 47698 57733
Antrodoco RI 10 2588 60321
Longone Sabino RI 11 597 60918
Rocca Sinibalda RI 11 815 61733
Petrella Salto RI 11 1197 62930
Micigliano RI 11 127 63057
Cantalice RI 13 2755 65812
Torricella in Sabina RI 15 1342 67154
Varco Sabino RI 15 187 67341
Montenero Sabino RI 16 299 67640
Poggio San Lorenzo RI 17 589 68229
Poggio Bustone RI 17 2055 70284
Monte San Giovanni in Sabina RI 17 714 70998
Marcetelli RI 17 89 71087
Fiamignano RI 17 1413 72500
Castel di Tora RI 17 288 72788
Colle di Tora RI 18 372 73160
Contigliano RI 18 3783 76943
Monteleone Sabino RI 18 1224 78167
Casaprota RI 19 744 78911
Rivodutri RI 19 1253 80164
Ascrea RI 19 234 80398
Greccio RI 19 1558 81956
Paganico Sabino RI 20 172 82128
Posta RI 20 694 82822

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km SE of Terni (111501 inhabitants)
35 Km W of L'Aquila (69753 inhabitants)
46 Km NE of Guidonia Montecelio (88673 inhabitants)
47 Km NE of Tivoli (56533 inhabitants)
67 Km NE of Roma (2864731 inhabitants)
68 Km W of Teramo (54892 inhabitants)
69 Km SE of Foligno (57155 inhabitants)
72 Km E of Viterbo (67173 inhabitants)
78 Km N of Velletri (53303 inhabitants)
87 Km NE of Pomezia (62966 inhabitants)
90 Km NE of Fiumicino (78395 inhabitants)
90 Km NE of Aprilia (73446 inhabitants)
95 Km SE of Perugia (166134 inhabitants)
98 Km W of Montesilvano (53738 inhabitants)
98 Km W of Chieti (51815 inhabitants)
100 Km N of Latina (125985 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 2.6 1986-12-27
00:50:30
42.37 12.98 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 38659
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-12-27 00:50:30 ± 0.206
Latitude 42.37 ± 0.01
Longitude 12.98 ± 0.02
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 38659

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) 2167.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 141
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00283
Epicentral distance of station farthest from the epicenter (degree) 0.01012
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:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 38659
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:38:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ASS.Z. 1986-12-27T00:50:57.50 10.0 undecidable manual SG 341 0.0066 0.33 0.4
--.RMP.Z. 1986-12-27T00:50:53.50 10.0 undecidable manual SG 200 0.0053 0.79 0
--.ARV.Z. 1986-12-27T00:50:53.00 10.0 undecidable manual PN 359 0.0101 -0.14 1.3
--.ASS.Z. 1986-12-27T00:50:46.00 10.0 undecidable manual PG 341 0.0066 -0.02 1.8
--.RMP.Z. 1986-12-27T00:50:43.00 10.0 undecidable manual PG 200 0.0053 -0.45 0.7
--.AQU.Z. 1986-12-27T00:50:38.00 10.0 undecidable manual PG 92 0.0028 0.11 1.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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