Earthquake with magnitude of Md 2.7 on date 05-02-1985 and time 05:15:50 (UTC) in region 2 km NE Collelongo (AQ)

A magnitude Md 2.7 earthquake occured in region: 2 km NE Collelongo (AQ), on

  • 05-02-1985 05:15:50 (UTC)
  • 05-02-1985 06:15:50 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.9, 13.61 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
Collelongo AQ 2 1233 1233
Villavallelonga AQ 4 919 2152
Ortucchio AQ 7 1860 4012
Lecce nei Marsi AQ 8 1702 5714
Trasacco AQ 9 6246 11960
Gioia dei Marsi AQ 10 1989 13949
San Vincenzo Valle Roveto AQ 10 2347 16296
Balsorano AQ 11 3569 19865
Civita d'Antino AQ 11 979 20844
San Benedetto dei Marsi AQ 12 3909 24753
Morino AQ 13 1448 26201
Bisegna AQ 13 223 26424
Luco dei Marsi AQ 13 6079 32503
Civitella Roveto AQ 15 3268 35771
Pescina AQ 15 4133 39904
Ortona dei Marsi AQ 15 542 40446
Pescosolido FR 17 1555 42001
Canistro AQ 17 995 42996
Pescasseroli AQ 18 2203 45199
Collarmele AQ 19 894 46093
Campoli Appennino FR 19 1725 47818
Cerchio AQ 19 1635 49453
Capistrello AQ 19 5252 54705
Sora FR 20 26144 80849
Villalago AQ 20 568 81417
Anversa degli Abruzzi AQ 20 341 81758

Municipalities with at least 50000 inhabitants

An earthquake occurred to
53 Km SE of L'Aquila (69753 inhabitants)
67 Km E of Tivoli (56533 inhabitants)
69 Km SW of Chieti (51815 inhabitants)
73 Km E of Velletri (53303 inhabitants)
74 Km E of Guidonia Montecelio (88673 inhabitants)
75 Km NE of Latina (125985 inhabitants)
81 Km SW of Pescara (121014 inhabitants)
82 Km SW of Montesilvano (53738 inhabitants)
85 Km S of Teramo (54892 inhabitants)
86 Km E of Aprilia (73446 inhabitants)
93 Km E of Roma (2864731 inhabitants)
95 Km E of Pomezia (62966 inhabitants)
95 Km NE of Anzio (54211 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 1985-02-05
05:15:50
41.9 13.61 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 1129
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-05 05:15:50 ± 0.255
Latitude 41.90 ± 0.04
Longitude 13.61 ± 0.06
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 1129

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) 6413.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 164
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
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) 0.0021
Epicentral distance of station farthest from the epicenter (degree) 0.01222
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

Md:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 1129
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:06:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AS1.Z. 1985-02-05T05:16:34.00 10.0 undecidable manual SN 329 0.0122 1.04 0.1
--.AS1.Z. 1985-02-05T05:16:15.00 10.0 undecidable manual PN 329 0.0122 0.14 1.1
--.PO9.Z. 1985-02-05T05:16:07.00 10.0 undecidable manual PG 324 0.0075 0.26 1.4
--.MNS.Z. 1985-02-05T05:16:06.60 10.0 undecidable manual PG 305 0.0075 -0.22 1.4
--.DUI.Z. 1985-02-05T05:16:04.00 10.0 undecidable manual PG 110 0.0061 0.2 1.5
--.SD1.Z. 1985-02-05T05:16:00.50 10.0 undecidable manual SG 140 0.0021 0.7 0.5
--.AQU.Z. 1985-02-05T05:15:59.00 10.0 undecidable manual PG 341 0.0043 -1.15 0.3
--.SD1.Z. 1985-02-05T05:15:55.00 10.0 positive manual PG 140 0.0021 -0.71 1.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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