ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of Md 2.7 on date 08-08-1985 and time 21:01:36 (Italy) in region 7 km NW Villetta Barrea (AQ)

A magnitude Md 2.7 earthquake occured in region: 7 km NW Villetta Barrea (AQ), on

  • 08-08-1985 19:01:36 (UTC)
  • 08-08-1985 21:01:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.83, 13.88 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
Villetta Barrea AQ 7 653 653
Opi AQ 7 420 1073
Scanno AQ 8 1847 2920
Pescasseroli AQ 8 2203 5123
Civitella Alfedena AQ 9 296 5419
Villalago AQ 12 568 5987
Barrea AQ 12 726 6713
Rocca Pia AQ 14 178 6891
Bisegna AQ 14 223 7114
San Donato Val di Comino FR 15 2107 9221
Rivisondoli AQ 16 700 9921
Scontrone AQ 16 574 10495
Roccaraso AQ 16 1627 12122
Pescocostanzo AQ 17 1128 13250
Alfedena AQ 17 864 14114
Pettorano sul Gizio AQ 17 1376 15490
Settefrati FR 18 728 16218
Anversa degli Abruzzi AQ 19 341 16559
Castel di Sangro AQ 20 6538 23097
Introdacqua AQ 20 2126 25223
Lecce nei Marsi AQ 20 1702 26925
Alvito FR 20 2713 29638
Campoli Appennino FR 20 1725 31363

Municipalities with at least 50000 inhabitants

An earthquake occurred to
62 Km SW of Chieti (51815 inhabitants)
70 Km SE of L'Aquila (69753 inhabitants)
76 Km SW of Pescara (121014 inhabitants)
79 Km S of Montesilvano (53738 inhabitants)
91 Km E of Latina (125985 inhabitants)
91 Km E of Tivoli (56533 inhabitants)
92 Km NW of Caserta (76326 inhabitants)
93 Km S of Teramo (54892 inhabitants)
93 Km E of Velletri (53303 inhabitants)
97 Km E of Guidonia Montecelio (88673 inhabitants)
99 Km N of Aversa (53047 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 2.7 1985-08-08
19:01:36
41.83 13.88 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 11359
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-08-08 19:01:36 ± 0.878
Latitude 41.83 ± 0.05
Longitude 13.88 ± 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 11359

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) 5666.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 296
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00121
Epicentral distance of station farthest from the epicenter (degree) 0.00575
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information

Md:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 11359
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:14:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MSC.Z. 1985-08-08T19:01:59.90 10.0 undecidable manual SG 174 0.0057 0.58 0.3
--.SGG.Z. 1985-08-08T19:01:57.10 10.0 undecidable manual SG 140 0.0052 -0.15 0.8
--.MSC.Z. 1985-08-08T19:01:50.20 10.0 undecidable manual PG 174 0.0057 0.43 1.2
--.SGG.Z. 1985-08-08T19:01:48.20 10.0 undecidable manual PG 140 0.0052 -0.38 1.4
--.SD1.Z. 1985-08-08T19:01:42.00 10.0 undecidable manual SG 203 0.0012 -0.97 0.1
--.SD1.Z. 1985-08-08T19:01:40.50 10.0 undecidable manual PG 203 0.0012 0.16 2.2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download