Earthquake with magnitude of Md 3.1 on date 16-07-1985 and time 09:08:24 (Italy) in region 4 km S Civitella Alfedena (AQ)

A magnitude Md 3.1 earthquake occured in region: 4 km S Civitella Alfedena (AQ), on

  • 16-07-1985 07:08:24 (UTC)
  • 16-07-1985 09:08:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.73, 13.94 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
Civitella Alfedena AQ 4 296 296
Villetta Barrea AQ 6 653 949
Barrea AQ 6 726 1675
Alfedena AQ 8 864 2539
Scontrone AQ 9 574 3113
Settefrati FR 10 728 3841
San Donato Val di Comino FR 11 2107 5948
Opi AQ 11 420 6368
Picinisco FR 11 1218 7586
Pizzone IS 11 329 7915
Montenero Val Cocchiara IS 11 538 8453
San Biagio Saracinisco FR 13 349 8802
Castel San Vincenzo IS 13 516 9318
Gallinaro FR 14 1269 10587
Pescasseroli AQ 15 2203 12790
Villa Latina FR 15 1241 14031
Castel di Sangro AQ 16 6538 20569
Cerro al Volturno IS 16 1281 21850
Scapoli IS 16 680 22530
Atina FR 17 4316 26846
Alvito FR 17 2713 29559
Rocchetta a Volturno IS 17 1113 30672
Rionero Sannitico IS 17 1118 31790
Roccaraso AQ 18 1627 33417
Acquaviva d'Isernia IS 19 425 33842
Rivisondoli AQ 19 700 34542
Belmonte Castello FR 20 739 35281
Vallerotonda FR 20 1581 36862
Scanno AQ 20 1847 38709
Colli a Volturno IS 20 1349 40058

Municipalities with at least 50000 inhabitants

An earthquake occurred to
72 Km S of Chieti (51815 inhabitants)
80 Km NW of Caserta (76326 inhabitants)
82 Km SE of L'Aquila (69753 inhabitants)
85 Km S of Pescara (121014 inhabitants)
87 Km N of Aversa (53047 inhabitants)
89 Km S of Montesilvano (53738 inhabitants)
91 Km E of Latina (125985 inhabitants)
92 Km N of Giugliano in Campania (122974 inhabitants)
94 Km NW of Acerra (59573 inhabitants)
95 Km N of Marano di Napoli (59874 inhabitants)
95 Km NW of Afragola (65057 inhabitants)
96 Km NW of Casoria (77642 inhabitants)
96 Km E of Velletri (53303 inhabitants)
97 Km NW of Benevento (60091 inhabitants)
98 Km E of Tivoli (56533 inhabitants)
99 Km N of Pozzuoli (81661 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 3.1 1985-07-16
07:08:24
41.73 13.94 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 10139
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-07-16 07:08:24 ± 0.348
Latitude 41.73 ± 0.04
Longitude 13.94 ± 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 10139

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) 4714.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 132
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.9
Epicentral distance of station closest to the epicenter (degree) 0.00081
Epicentral distance of station farthest from the epicenter (degree) 0.0106
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 10139
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:13:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.PO9.Z. 1985-07-16T07:08:47.00 10.0 undecidable manual PN 319 0.01 1.44 0.5
--.SOR.Z. 1985-07-16T07:08:47.00 10.0 undecidable manual PN 165 0.0106 0.56 1
--.MNS.Z. 1985-07-16T07:08:47.00 10.0 undecidable manual PN 305 0.0102 1.19 0.6
--.AQU.Z. 1985-07-16T07:08:38.50 10.0 undecidable manual PG 327 0.0066 -0.44 1.4
--.DUI.Z. 1985-07-16T07:08:37.50 10.0 undecidable manual SG 99 0.0035 -1.2 0.5
--.MSC.Z. 1985-07-16T07:08:36.80 10.0 undecidable manual PG 177 0.0048 1.61 0.5
--.SGG.Z. 1985-07-16T07:08:33.80 10.0 undecidable manual PG 135 0.0042 -0.23 1.6
--.DUI.Z. 1985-07-16T07:08:32.00 10.0 undecidable manual PG 99 0.0035 -0.54 1.5
--.SD1.Z. 1985-07-16T07:08:28.00 10.0 undecidable manual SG 257 0.0008 -1.22 0.5
--.SD1.Z. 1985-07-16T07:08:26.00 10.0 positive manual PG 257 0.0008 -1.06 2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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