Earthquake with magnitude of Md 2.5 on date 06-01-1985 and time 22:53:50 (Italy) in region 3 km W Rocca Pia (AQ)

A magnitude Md 2.5 earthquake occured in region: 3 km W Rocca Pia (AQ), on

  • 06-01-1985 21:53:50 (UTC)
  • 06-01-1985 22:53:50 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.9360, 13.9370 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
Rocca Pia AQ 3 178 178
Pettorano sul Gizio AQ 5 1376 1554
Scanno AQ 6 1847 3401
Villalago AQ 8 568 3969
Introdacqua AQ 9 2126 6095
Cansano AQ 10 274 6369
Bugnara AQ 12 1125 7494
Pescocostanzo AQ 12 1128 8622
Campo di Giove AQ 12 803 9425
Sulmona AQ 13 24557 33982
Anversa degli Abruzzi AQ 13 341 34323
Rivisondoli AQ 13 700 35023
Pacentro AQ 14 1174 36197
Bisegna AQ 15 223 36420
Roccaraso AQ 15 1627 38047
Prezza AQ 16 945 38992
Cocullo AQ 17 230 39222
Palena CH 18 1392 40614
Villetta Barrea AQ 18 653 41267
Ortona dei Marsi AQ 19 542 41809
Pescasseroli AQ 19 2203 44012
Pratola Peligna AQ 19 7577 51589
Civitella Alfedena AQ 19 296 51885
Opi AQ 19 420 52305
Lettopalena CH 20 358 52663

Municipalities with at least 50000 inhabitants

An earthquake occurred to
50 Km SW of Chieti (51815 inhabitants)
63 Km SW of Pescara (121014 inhabitants)
64 Km SE of L'Aquila (69753 inhabitants)
67 Km S of Montesilvano (53738 inhabitants)
83 Km S of Teramo (54892 inhabitants)
94 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 2.5 1985-01-06
21:53:50
41.936 13.937 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 149
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-01-06 21:53:50 ± 0.793
Latitude 41.9360 ± 0.0418
Longitude 13.9370 ± 0.0340
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 149

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) 5430.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 282
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00219
Epicentral distance of station farthest from the epicenter (degree) 0.00664
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:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 149
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:05:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MSC.Z. 1985-01-06T21:54:16.60 10.0 undecidable manual SG 177 0.0066 0.27 0.5
--.SGG.Z. 1985-01-06T21:54:13.50 10.0 undecidable manual SG 148 0.0057 0.5 0.4
--.MSC.Z. 1985-01-06T21:54:04.50 10.0 undecidable manual PG 177 0.0066 -0.92 0.4
--.SGG.Z. 1985-01-06T21:54:02.80 10.0 undecidable manual PG 148 0.0057 -0.7 0.8
--.DUI.Z. 1985-01-06T21:54:01.00 10.0 undecidable manual PG 125 0.0043 0.53 1.1
--.SD1.Z. 1985-01-06T21:53:56.50 10.0 negative manual PG 202 0.0022 0.32 2.8
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