Earthquake with magnitude of Md 2.4 on date 18-09-1985 and time 00:29:41 (Italy) in region 3 km E Cittaducale (RI)

A magnitude Md 2.4 earthquake occured in region: 3 km E Cittaducale (RI), on

  • 17-09-1985 22:29:41 (UTC)
  • 18-09-1985 00:29:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.39, 12.99 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 3 6828 6828
Castel Sant'Angelo RI 4 1308 8136
Borgo Velino RI 6 972 9108
Concerviano RI 7 291 9399
Antrodoco RI 8 2588 11987
Micigliano RI 9 127 12114
Rieti RI 10 47698 59812
Belmonte in Sabina RI 11 636 60448
Cantalice RI 11 2755 63203
Petrella Salto RI 12 1197 64400
Longone Sabino RI 13 597 64997
Rocca Sinibalda RI 14 815 65812
Poggio Bustone RI 15 2055 67867
Varco Sabino RI 17 187 68054
Torricella in Sabina RI 17 1342 69396
Posta RI 18 694 70090
Fiamignano RI 18 1413 71503
Rivodutri RI 18 1253 72756
Contigliano RI 18 3783 76539
Monte San Giovanni in Sabina RI 18 714 77253
Montenero Sabino RI 18 299 77552
Borbona RI 18 617 78169
Marcetelli RI 19 89 78258
Poggio San Lorenzo RI 19 589 78847
Castel di Tora RI 19 288 79135
Greccio RI 19 1558 80693
Leonessa RI 20 2435 83128
Colle di Tora RI 20 372 83500
Morro Reatino RI 20 373 83873

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km SE of Terni (111501 inhabitants)
34 Km W of L'Aquila (69753 inhabitants)
48 Km NE of Guidonia Montecelio (88673 inhabitants)
50 Km NE of Tivoli (56533 inhabitants)
66 Km W of Teramo (54892 inhabitants)
67 Km SE of Foligno (57155 inhabitants)
69 Km NE of Roma (2864731 inhabitants)
72 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)
93 Km NE of Aprilia (73446 inhabitants)
94 Km SE of Perugia (166134 inhabitants)
97 Km W of Montesilvano (53738 inhabitants)
97 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 1985-09-17
22:29:41
42.39 12.99 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 13339
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-09-17 22:29:41 ± 0.311
Latitude 42.39 ± 0.03
Longitude 12.99 ± 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 13339

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) 3796.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 131
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) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.00202
Epicentral distance of station farthest from the epicenter (degree) 0.00818
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:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 13339
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:16:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AS1.Z. 1985-09-17T22:30:06.00 10.0 undecidable manual SG 339 0.0064 -0.92 0.4
--.SD1.Z. 1985-09-17T22:30:00.00 10.0 undecidable manual PG 137 0.0082 -0.02 1.7
--.AS1.Z. 1985-09-17T22:29:57.00 10.0 undecidable manual PG 339 0.0064 0.62 1.4
--.MNS.Z. 1985-09-17T22:29:52.00 10.0 undecidable manual SG 269 0.002 0.84 0.5
--.AQU.Z. 1985-09-17T22:29:52.50 10.0 undecidable manual SG 96 0.0028 -1.29 0.2
--.AQU.Z. 1985-09-17T22:29:49.50 10.0 undecidable manual PG 96 0.0028 0.7 1.5
--.MNS.Z. 1985-09-17T22:29:46.50 10.0 undecidable manual PG 269 0.002 -0.78 1.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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