Earthquake with magnitude of Md 2.9 on date 01-04-1985 and time 15:57:11 (Italy) in region 1 km SE Vicalvi (FR)

A magnitude Md 2.9 earthquake occured in region: 1 km SE Vicalvi (FR), on

  • 01-04-1985 13:57:11 (UTC)
  • 01-04-1985 15:57:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.67, 13.71 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
Vicalvi FR 1 783 783
Posta Fibreno FR 3 1139 1922
Fontechiari FR 3 1303 3225
Alvito FR 3 2713 5938
Casalvieri FR 4 2698 8636
Casalattico FR 6 574 9210
Gallinaro FR 7 1269 10479
Broccostella FR 7 2741 13220
Campoli Appennino FR 8 1725 14945
Arpino FR 9 7262 22207
Atina FR 9 4316 26523
San Donato Val di Comino FR 9 2107 28630
Sora FR 10 26144 54774
Santopadre FR 10 1357 56131
Pescosolido FR 10 1555 57686
Isola del Liri FR 11 11715 69401
Settefrati FR 12 728 70129
Villa Latina FR 12 1241 71370
Belmonte Castello FR 13 739 72109
Picinisco FR 13 1218 73327
Castelliri FR 14 3454 76781
Colle San Magno FR 14 699 77480
Roccasecca FR 14 7365 84845
Rocca d'Arce FR 14 959 85804
Terelle FR 14 422 86226
Arce FR 15 5756 91982
Fontana Liri FR 15 2953 94935
Opi AQ 16 420 95355
Colfelice FR 16 1932 97287
Castrocielo FR 16 3965 101252
Pescasseroli AQ 17 2203 103455
Monte San Giovanni Campano FR 17 12929 116384
Villa Santa Lucia FR 19 2632 119016
San Biagio Saracinisco FR 19 349 119365
Balsorano AQ 19 3569 122934
Sant'Elia Fiumerapido FR 19 6166 129100
Piedimonte San Germano FR 20 6535 135635
Strangolagalli FR 20 2491 138126
Aquino FR 20 5370 143496

Municipalities with at least 50000 inhabitants

An earthquake occurred to
71 Km E of Latina (125985 inhabitants)
78 Km E of Velletri (53303 inhabitants)
80 Km SE of L'Aquila (69753 inhabitants)
82 Km E of Tivoli (56533 inhabitants)
84 Km NW of Caserta (76326 inhabitants)
85 Km SW of Chieti (51815 inhabitants)
88 Km NW of Aversa (53047 inhabitants)
89 Km E of Aprilia (73446 inhabitants)
90 Km E of Guidonia Montecelio (88673 inhabitants)
92 Km NW of Giugliano in Campania (122974 inhabitants)
94 Km E of Anzio (54211 inhabitants)
95 Km NW of Marano di Napoli (59874 inhabitants)
97 Km NW of Pozzuoli (81661 inhabitants)
97 Km NW of Afragola (65057 inhabitants)
98 Km SW of Pescara (121014 inhabitants)
98 Km NW of Acerra (59573 inhabitants)
98 Km NW of Casoria (77642 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
ML-VAX 2.7
1985-04-01
13:57:11
41.67 13.71 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 3869
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-01 13:57:11 ± 0.282
Latitude 41.67 ± 0.03
Longitude 13.71 ± 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 3869

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) 3758.3
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 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00073
Epicentral distance of station farthest from the epicenter (degree) 0.02105
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

Md:2.9

Field Value
Value 2.9
Uncertainty
Num. used stations 6
Type of magnitude Md
Reference to an origin 3869
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:08:35

ML:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 3869
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CH1.Z. 1985-04-01T13:57:51.00 10.0 undecidable manual PN 327 0.021 1.71 0.3
--.PO9.Z. 1985-04-01T13:57:49.00 10.0 undecidable manual SN 327 0.0096 2.09 0.1
--.AR1.Z. 1985-04-01T13:57:46.00 10.0 undecidable manual PN? 343 0.0172 2.67 0
--.SGO.Z. 1985-04-01T13:57:41.00 10.0 undecidable manual PN 132 0.0147 1.44 0.5
--.RDP.Z. 1985-04-01T13:57:38.50 10.0 undecidable manual SG 277 0.0067 1.54 0.2
--.AQU.Z. 1985-04-01T13:57:37.00 10.0 undecidable manual SG 341 0.0065 0.95 0.4
--.RMP.N. 1985-04-01T13:57:36.50 10.0 undecidable manual SG 280 0.0069 -1.05 0.4
--.TR9.Z. 1985-04-01T13:57:35.60 10.0 undecidable manual PN 118 0.0117 0.68 1.1
--.SOR.Z. 1985-04-01T13:57:34.60 10.0 undecidable manual PN 156 0.0106 1.23 0.7
--.MNS.Z. 1985-04-01T13:57:31.00 10.0 undecidable manual PN 313 0.0094 -0.45 2.8
--.PO9.Z. 1985-04-01T13:57:31.20 10.0 undecidable manual PN 327 0.0096 -0.55 1.3
--.DUI.Z. 1985-04-01T13:57:30.00 10.0 undecidable manual SG 91 0.0049 -0.82 0.5
--.RDP.Z. 1985-04-01T13:57:25.50 10.0 undecidable manual PG 277 0.0067 -0.51 2.9
--.RMP.Z. 1985-04-01T13:57:25.00 10.0 undecidable manual PG 280 0.0069 -1.34 0.7
--.AQU.Z. 1985-04-01T13:57:25.30 10.0 undecidable manual PG 341 0.0065 -0.18 1.6
--.DUI.Z. 1985-04-01T13:57:22.10 10.0 undecidable manual PG 91 0.0049 -0.36 1.5
--.MSC.Z. 1985-04-01T13:57:21.90 10.0 undecidable manual PG 157 0.0046 0.16 1.6
--.SGG.Z. 1985-04-01T13:57:21.90 10.0 undecidable manual PG 119 0.0051 -0.89 1.1
--.SD1.Z. 1985-04-01T13:57:15.00 10.0 undecidable manual SG 63 0.0007 -0.72 0.8
--.SD1.Z. 1985-04-01T13:57:12.40 10.0 negative manual PG 63 0.0007 -1.34 1.5
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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