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) 41.7150, 13.9410 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
Colli a Volturno IS 19 1349 35884
Roccaraso AQ 19 1627 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

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
Md 2.6 1985-01-02
22:57:43
41.715 13.941 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 41.7150 ± 0.0572
Longitude 13.9410 ± 0.0143
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
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download