Earthquake with magnitude of Md 3.1 on date 07-08-1985 and time 21:25:32 (Italy) in region 2 km W Atina (FR)

A magnitude Md 3.1 earthquake occured in region: 2 km W Atina (FR), on

  • 07-08-1985 19:25:32 (UTC)
  • 07-08-1985 21:25:32 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.62, 13.77 at 8 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
Atina FR 2 4316 4316
Casalattico FR 4 574 4890
Gallinaro FR 5 1269 6159
Casalvieri FR 5 2698 8857
Villa Latina FR 6 1241 10098
Belmonte Castello FR 6 739 10837
Terelle FR 7 422 11259
Alvito FR 8 2713 13972
Vicalvi FR 8 783 14755
Picinisco FR 9 1218 15973
Settefrati FR 9 728 16701
Fontechiari FR 10 1303 18004
Colle San Magno FR 10 699 18703
Posta Fibreno FR 10 1139 19842
San Donato Val di Comino FR 10 2107 21949
Roccasecca FR 11 7365 29314
Santopadre FR 12 1357 30671
Castrocielo FR 12 3965 34636
Sant'Elia Fiumerapido FR 12 6166 40802
Villa Santa Lucia FR 12 2632 43434
San Biagio Saracinisco FR 13 349 43783
Arpino FR 14 7262 51045
Piedimonte San Germano FR 14 6535 57580
Vallerotonda FR 14 1581 59161
Broccostella FR 15 2741 61902
Cassino FR 15 36142 98044
Aquino FR 15 5370 103414
Campoli Appennino FR 15 1725 105139
Colfelice FR 16 1932 107071
Rocca d'Arce FR 16 959 108030
Arce FR 17 5756 113786
Sora FR 17 26144 139930
Acquafondata FR 17 263 140193
Pescosolido FR 17 1555 141748
Isola del Liri FR 18 11715 153463
Fontana Liri FR 18 2953 156416
Opi AQ 18 420 156836
Cervaro FR 19 8109 164945
Castelliri FR 20 3454 168399
Viticuso FR 20 353 168752

Municipalities with at least 50000 inhabitants

An earthquake occurred to
74 Km E of Latina (125985 inhabitants)
77 Km NW of Caserta (76326 inhabitants)
81 Km NW of Aversa (53047 inhabitants)
83 Km E of Velletri (53303 inhabitants)
85 Km NW of Giugliano in Campania (122974 inhabitants)
87 Km SE of L'Aquila (69753 inhabitants)
88 Km NW of Marano di Napoli (59874 inhabitants)
88 Km SW of Chieti (51815 inhabitants)
89 Km E of Tivoli (56533 inhabitants)
90 Km NW of Afragola (65057 inhabitants)
90 Km N of Pozzuoli (81661 inhabitants)
90 Km NW of Acerra (59573 inhabitants)
91 Km NW of Casoria (77642 inhabitants)
93 Km E of Aprilia (73446 inhabitants)
96 Km NW of Napoli (974074 inhabitants)
96 Km E of Guidonia Montecelio (88673 inhabitants)
97 Km E of Anzio (54211 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 3.1 1985-08-07
19:25:32
41.62 13.77 7 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 11349
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-08-07 19:25:32 ± 0.549
Latitude 41.62 ± 0.04
Longitude 13.77 ± 0.05
Depth (km) 7 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 11349

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) 5409.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
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) 0.00081
Epicentral distance of station farthest from the epicenter (degree) 0.01489
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 11349
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:14:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SGO.Z. 1985-08-07T19:26:20.00 10.0 undecidable manual SN 132 0.0141 -1.01 0.3
--.PO9.Z. 1985-08-07T19:26:12.00 10.0 undecidable manual SN 327 0.0102 1.37 0.2
--.AS1.Z. 1985-08-07T19:26:03.50 10.0 undecidable manual PN 330 0.0149 1.75 0.2
--.CM2.Z. 1985-08-07T19:26:01.10 10.0 undecidable manual PN 343 0.0147 -0.33 1.1
--.SGO.Z. 1985-08-07T19:26:00.50 10.0 undecidable manual PN 132 0.0141 -0.01 1.2
--.TR9.Z. 1985-08-07T19:25:56.30 10.0 undecidable manual PN 117 0.0111 0.38 1.3
--.PO9.Z. 1985-08-07T19:25:55.00 10.0 undecidable manual PN 327 0.0102 0.48 1.3
--.MNS.Z. 1985-08-07T19:25:54.00 10.0 undecidable manual PN 313 0.01 -0.23 1.5
--.RDP.Z. 1985-08-07T19:25:47.50 10.0 undecidable manual PG 280 0.0071 -1.2 0.6
--.AQU.Z. 1985-08-07T19:25:47.00 10.0 undecidable manual PG 339 0.007 -1.38 0.5
--.SGG.Z. 1985-08-07T19:25:43.20 10.0 undecidable manual PG 117 0.0045 -0.16 1.6
--.MSC.Z. 1985-08-07T19:25:43.40 10.0 undecidable manual PG 160 0.004 1.08 0.8
--.DUI.Z. 1985-08-07T19:25:42.50 10.0 undecidable manual PG 85 0.0046 -0.91 0.9
--.SD1.Z. 1985-08-07T19:25:38.00 10.0 undecidable manual SG 18 0.0008 1.09 0.3
--.SD1.Z. 1985-08-07T19:25:35.00 10.0 negative manual PG 18 0.0008 -0.05 3.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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