Earthquake with magnitude of Md 2.9 on date 09-04-1985 and time 10:28:41 (UTC) in region 5 km W Stroncone (TR)

A magnitude Md 2.9 earthquake occured in region: 5 km W Stroncone (TR), on

  • 09-04-1985 10:28:41 (UTC)
  • 09-04-1985 12:28:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.49, 12.6 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
Stroncone TR 5 4917 4917
Configni RI 8 633 5550
Narni TR 8 19785 25335
Terni TR 9 111501 136836
Calvi dell'Umbria TR 10 1856 138692
Cottanello RI 11 563 139255
Vacone RI 11 256 139511
Otricoli TR 12 1869 141380
Montasola RI 13 395 141775
Montebuono RI 13 883 142658
Greccio RI 14 1558 144216
Tarano RI 14 1444 145660
Colli sul Velino RI 15 533 146193
San Gemini TR 15 5018 151211
Torri in Sabina RI 15 1256 152467
Contigliano RI 16 3783 156250
Magliano Sabina RI 17 3774 160024
Labro RI 17 374 160398
Collevecchio RI 17 1577 161975
Casperia RI 17 1246 163221
Amelia TR 17 11897 175118
Arrone TR 18 2763 177881
Orte VT 18 8923 186804
Selci RI 19 1106 187910
Montefranco TR 19 1276 189186
Morro Reatino RI 20 373 189559
Roccantica RI 20 563 190122
Cantalupo in Sabina RI 20 1685 191807

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km SW of Terni (111501 inhabitants)
41 Km E of Viterbo (67173 inhabitants)
53 Km S of Foligno (57155 inhabitants)
55 Km N of Guidonia Montecelio (88673 inhabitants)
60 Km N of Tivoli (56533 inhabitants)
67 Km N of Roma (2864731 inhabitants)
67 Km W of L'Aquila (69753 inhabitants)
71 Km S of Perugia (166134 inhabitants)
79 Km NE of Civitavecchia (52991 inhabitants)
85 Km NE of Fiumicino (78395 inhabitants)
90 Km N of Velletri (53303 inhabitants)
91 Km N of Pomezia (62966 inhabitants)
93 Km W of Teramo (54892 inhabitants)
99 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 2.9 1985-04-09
10:28:41
42.49 12.6 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 4439
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-09 10:28:41 ± 0.398
Latitude 42.49 ± 0.02
Longitude 12.60 ± 0.04
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 4439

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) 4100.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 164
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
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) 0.00097
Epicentral distance of station farthest from the epicenter (degree) 0.01109
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

Md:2.9

Field Value
Value 2.9
Uncertainty
Num. used stations 6
Type of magnitude Md
Reference to an origin 4439
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:09:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CH1.Z. 1985-04-09T10:29:23.00 10.0 undecidable manual SN 337 0.0111 1.58 0.1
--.SD1.Z. 1985-04-09T10:29:22.50 10.0 undecidable manual SN 130 0.0106 2.28 0
--.AR1.Z. 1985-04-09T10:29:18.00 10.0 undecidable manual SN 13 0.0093 1.19 0.2
--.ALP.Z. 1985-04-09T10:29:10.10 10.0 undecidable manual SG 67 0.0069 1.96 0.1
--.RDP.Z. 1985-04-09T10:29:08.50 10.0 undecidable manual SG 173 0.0066 1.56 0.1
--.CH1.Z. 1985-04-09T10:29:06.00 10.0 undecidable manual PN 337 0.0111 1.44 0.3
--.SD1.Z. 1985-04-09T10:29:04.50 10.0 undecidable manual PN 130 0.0106 0.63 0.8
--.PRG.Z. 1985-04-09T10:29:02.00 10.0 undecidable manual SG 346 0.0057 -1.78 0.1
--.AS1.Z. 1985-04-09T10:29:02.50 10.0 undecidable manual SG 3 0.0052 0.51 0.5
--.AR1.Z. 1985-04-09T10:29:01.50 10.0 undecidable manual PN 13 0.0093 -0.4 1.1
--.RDP.Z. 1985-04-09T10:28:56.00 10.0 undecidable manual PG 173 0.0066 -0.2 1.4
--.ALP.Z. 1985-04-09T10:28:56.60 10.0 undecidable manual PG 67 0.0069 -0.3 2.6
--.PRG.Z. 1985-04-09T10:28:54.00 10.0 undecidable manual PG 346 0.0057 -0.38 2.6
--.AQU.Z. 1985-04-09T10:28:54.00 10.0 undecidable manual PG 102 0.0054 0.14 1.4
--.AS1.Z. 1985-04-09T10:28:53.50 10.0 positive manual PG 3 0.0052 0.16 2.8
--.PO9.Z. 1985-04-09T10:28:51.00 10.0 undecidable manual SG 70 0.0023 -1.01 0.3
--.PO9.Z. 1985-04-09T10:28:47.00 10.0 positive manual PG 70 0.0023 -0.58 2.3
--.MNS.Z. 1985-04-09T10:28:46.30 10.0 undecidable manual SG 149 0.001 -0.91 0.3
--.MNS.Z. 1985-04-09T10:28:44.00 10.0 positive manual PG 149 0.001 -0.81 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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