Earthquake with magnitude of Md 2.1 on date 18-02-1985 and time 16:42:04 (UTC) in region 6 km NW Configni (RI)

A magnitude Md 2.1 earthquake occured in region: 6 km NW Configni (RI), on

  • 18-02-1985 16:42:04 (UTC)
  • 18-02-1985 17:42:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.46, 12.59 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
Configni RI 6 633 633
Calvi dell'Umbria TR 7 1856 2489
Stroncone TR 7 4917 7406
Narni TR 9 19785 27191
Vacone RI 9 256 27447
Cottanello RI 10 563 28010
Otricoli TR 10 1869 29879
Montebuono RI 11 883 30762
Montasola RI 11 395 31157
Tarano RI 12 1444 32601
Terni TR 12 111501 144102
Torri in Sabina RI 13 1256 145358
Magliano Sabina RI 14 3774 149132
Collevecchio RI 14 1577 150709
Greccio RI 15 1558 152267
Casperia RI 15 1246 153513
Contigliano RI 16 3783 157296
Selci RI 16 1106 158402
Colli sul Velino RI 16 533 158935
Orte VT 17 8923 167858
San Gemini TR 17 5018 172876
Cantalupo in Sabina RI 18 1685 174561
Roccantica RI 18 563 175124
Gallese VT 18 2849 177973
Forano RI 18 3179 181152
Stimigliano RI 18 2328 183480
Amelia TR 18 11897 195377
Labro RI 19 374 195751
Penna in Teverina TR 20 1099 196850

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km SW of Terni (111501 inhabitants)
40 Km E of Viterbo (67173 inhabitants)
52 Km N of Guidonia Montecelio (88673 inhabitants)
56 Km S of Foligno (57155 inhabitants)
58 Km NW of Tivoli (56533 inhabitants)
64 Km N of Roma (2864731 inhabitants)
68 Km W of L'Aquila (69753 inhabitants)
74 Km S of Perugia (166134 inhabitants)
77 Km NE of Civitavecchia (52991 inhabitants)
82 Km NE of Fiumicino (78395 inhabitants)
87 Km N of Velletri (53303 inhabitants)
88 Km N of Pomezia (62966 inhabitants)
94 Km W of Teramo (54892 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 2.1 1985-02-18
16:42:04
42.46 12.59 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 1919
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-18 16:42:04 ± 0.731
Latitude 42.46 ± 0.02
Longitude 12.59 ± 0.06
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 1919

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) 5681
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 225
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) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00089
Epicentral distance of station farthest from the epicenter (degree) 0.00542
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:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 1919
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:06:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AS1.Z. 1985-02-18T16:42:27.00 10.0 undecidable manual SG 4 0.0054 1.32 0
--.AQU.Z. 1985-02-18T16:42:18.00 10.0 undecidable manual PG 99 0.0054 1.2 0.2
--.AS1.Z. 1985-02-18T16:42:16.00 10.0 undecidable manual PG 4 0.0054 -0.69 0.6
--.PO9.Z. 1985-02-18T16:42:15.00 10.0 undecidable manual SG 66 0.0025 -0.41 0.6
--.PO9.Z. 1985-02-18T16:42:10.50 10.0 undecidable manual PG 66 0.0025 -0.27 2.4
--.MNS.Z. 1985-02-18T16:42:09.00 10.0 undecidable manual SG 138 0.0009 -0.64 0.5
--.MNS.Z. 1985-02-18T16:42:07.50 10.0 negative manual PG 138 0.0009 0.06 2.6
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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