Earthquake with magnitude of Md 2.6 on date 02-01-1985 and time 23:57:43 (Italy) in region 6 km S Civitella Alfedena (AQ)

A magnitude Md 2.6 earthquake occured in region: 6 km S Civitella Alfedena (AQ), on

  • 02-01-1985 22:57:43 (UTC)
  • 02-01-1985 23:57:43 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.72, 13.94 at 6 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
Civitella Alfedena AQ 6 296 296
Barrea AQ 7 726 1022
Villetta Barrea AQ 7 653 1675
Alfedena AQ 8 864 2539
Settefrati FR 9 728 3267
Scontrone AQ 9 574 3841
Pizzone IS 10 329 4170
Picinisco FR 10 1218 5388
San Donato Val di Comino FR 11 2107 7495
Montenero Val Cocchiara IS 11 538 8033
San Biagio Saracinisco FR 11 349 8382
Opi AQ 12 420 8802
Castel San Vincenzo IS 12 516 9318
Gallinaro FR 13 1269 10587
Villa Latina FR 14 1241 11828
Scapoli IS 15 680 12508
Cerro al Volturno IS 15 1281 13789
Atina FR 16 4316 18105
Rocchetta a Volturno IS 16 1113 19218
Castel di Sangro AQ 16 6538 25756
Pescasseroli AQ 16 2203 27959
Rionero Sannitico IS 17 1118 29077
Alvito FR 17 2713 31790
Acquaviva d'Isernia IS 18 425 32215
Vallerotonda FR 18 1581 33796
Belmonte Castello FR 19 739 34535
Roccaraso AQ 19 1627 36162
Colli a Volturno IS 19 1349 37511
Acquafondata FR 19 263 37774
Vicalvi FR 20 783 38557

Municipalities with at least 50000 inhabitants

An earthquake occurred to
73 Km S of Chieti (51815 inhabitants)
78 Km NW of Caserta (76326 inhabitants)
84 Km SE of L'Aquila (69753 inhabitants)
85 Km N of Aversa (53047 inhabitants)
87 Km S of Pescara (121014 inhabitants)
90 Km N of Giugliano in Campania (122974 inhabitants)
90 Km E of Latina (125985 inhabitants)
91 Km S of Montesilvano (53738 inhabitants)
93 Km NW of Acerra (59573 inhabitants)
93 Km N of Marano di Napoli (59874 inhabitants)
93 Km NW of Afragola (65057 inhabitants)
95 Km NW of Casoria (77642 inhabitants)
96 Km NW of Benevento (60091 inhabitants)
97 Km E of Velletri (53303 inhabitants)
97 Km N of Pozzuoli (81661 inhabitants)
99 Km E of Tivoli (56533 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 2.6 1985-01-02
22:57:43
41.72 13.94 6 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 19
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-01-02 22:57:43 ± 0.446
Latitude 41.72 ± 0.06
Longitude 13.94 ± 0.01
Depth (km) 6 ± 5 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 19

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) 6471.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 191
Number of associated phases, regardless of their use for origin computation 5
Number of defining phases 5
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00081
Epicentral distance of station farthest from the epicenter (degree) 0.00469
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:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 19
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:05:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MSC.Z. 1985-01-02T22:57:54.60 10.0 undecidable manual PG 177 0.0047 0.24 0.5
--.DUI.Z. 1985-01-02T22:57:52.00 10.0 undecidable manual PG 97 0.0035 0.16 0.9
--.SGG.Z. 1985-01-02T22:57:52.90 10.0 undecidable manual PG 134 0.0041 -0.34 0.3
--.SD1.Z. 1985-01-02T22:57:47.20 10.0 undecidable manual SG 266 0.0008 -0.16 0.6
--.SD1.Z. 1985-01-02T22:57:45.60 10.0 positive manual PG 266 0.0008 0.04 2.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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