Earthquake with magnitude of Md 2.4 on date 09-02-1986 and time 09:30:31 (Italy) in region 2 km NE Cittaducale (RI)

A magnitude Md 2.4 earthquake occured in region: 2 km NE Cittaducale (RI), on

  • 09-02-1986 08:30:31 (UTC)
  • 09-02-1986 09:30:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.4, 12.97 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 2 6828 6828
Castel Sant'Angelo RI 5 1308 8136
Borgo Velino RI 8 972 9108
Concerviano RI 8 291 9399
Rieti RI 9 47698 57097
Antrodoco RI 10 2588 59685
Micigliano RI 10 127 59812
Cantalice RI 10 2755 62567
Belmonte in Sabina RI 11 636 63203
Longone Sabino RI 14 597 63800
Poggio Bustone RI 14 2055 65855
Petrella Salto RI 14 1197 67052
Rocca Sinibalda RI 14 815 67867
Rivodutri RI 16 1253 69120
Contigliano RI 17 3783 72903
Torricella in Sabina RI 17 1342 74245
Monte San Giovanni in Sabina RI 17 714 74959
Greccio RI 18 1558 76517
Posta RI 18 694 77211
Varco Sabino RI 18 187 77398
Montenero Sabino RI 18 299 77697
Morro Reatino RI 18 373 78070
Leonessa RI 19 2435 80505
Poggio San Lorenzo RI 19 589 81094
Borbona RI 19 617 81711
Colli sul Velino RI 19 533 82244
Fiamignano RI 19 1413 83657
Marcetelli RI 20 89 83746
Castel di Tora RI 20 288 84034

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km SE of Terni (111501 inhabitants)
36 Km W of L'Aquila (69753 inhabitants)
48 Km NE of Guidonia Montecelio (88673 inhabitants)
50 Km N of Tivoli (56533 inhabitants)
66 Km SE of Foligno (57155 inhabitants)
67 Km W of Teramo (54892 inhabitants)
69 Km NE of Roma (2864731 inhabitants)
71 Km E of Viterbo (67173 inhabitants)
80 Km N of Velletri (53303 inhabitants)
89 Km NE of Pomezia (62966 inhabitants)
92 Km NE of Fiumicino (78395 inhabitants)
92 Km SE of Perugia (166134 inhabitants)
93 Km N of Aprilia (73446 inhabitants)
98 Km W of Montesilvano (53738 inhabitants)
99 Km W of Chieti (51815 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 2.4 1986-02-09
08:30:31
42.4 12.97 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 22439
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-02-09 08:30:31 ± 0.284
Latitude 42.40 ± 0.02
Longitude 12.97 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 22439

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) 2827.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 102
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) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00186
Epicentral distance of station farthest from the epicenter (degree) 0.00834
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:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 22439
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:24:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CM8.Z. 1986-02-09T08:31:00.46 10.0 undecidable manual SG 8 0.0072 0.75 0.5
--.SD1.Z. 1986-02-09T08:30:50.50 10.0 undecidable manual PG 137 0.0083 0.35 1.2
--.CM8.Z. 1986-02-09T08:30:47.77 10.0 undecidable manual PG 8 0.0072 -0.17 1.4
--.RDP.Z. 1986-02-09T08:30:46.00 10.0 undecidable manual PG 196 0.0059 0.74 1
--.AQU.Z. 1986-02-09T08:30:45.00 10.0 undecidable manual SG 97 0.0028 0.89 0.3
--.MNS.Z. 1986-02-09T08:30:41.00 10.0 undecidable manual SG 266 0.0019 0.4 1
--.AQU.Z. 1986-02-09T08:30:37.50 10.0 undecidable manual PG 97 0.0028 -1.43 0.3
--.MNS.Z. 1986-02-09T08:30:36.20 10.0 negative manual PG 266 0.0019 -0.7 2.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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