Earthquake with magnitude of Md 3.3 on date 20-05-1985 and time 19:59:42 (Italy) in region 1 km E Lucoli (AQ)

A magnitude Md 3.3 earthquake occured in region: 1 km E Lucoli (AQ), on

  • 20-05-1985 17:59:42 (UTC)
  • 20-05-1985 19:59:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.29, 13.35 at 8 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
Lucoli AQ 1 1011 1011
Tornimparte AQ 4 3187 4198
L'Aquila AQ 8 69753 73951
Ocre AQ 10 1167 75118
Fossa AQ 12 721 75839
Scoppito AQ 12 3727 79566
Rocca di Cambio AQ 13 533 80099
Borgorose RI 14 4591 84690
Sant'Eusanio Forconese AQ 15 394 85084
Villa Sant'Angelo AQ 16 424 85508
Poggio Picenze AQ 16 1136 86644
Rocca di Mezzo AQ 17 1526 88170
Pizzoli AQ 17 4326 92496
San Demetrio ne' Vestini AQ 17 1854 94350
Fiamignano RI 19 1413 95763
Barete AQ 19 737 96500
Pescorocchiano RI 19 2075 98575
Fagnano Alto AQ 19 418 98993

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km SW of L'Aquila (69753 inhabitants)
50 Km SW of Teramo (54892 inhabitants)
58 Km NE of Tivoli (56533 inhabitants)
61 Km NE of Guidonia Montecelio (88673 inhabitants)
65 Km E of Terni (111501 inhabitants)
68 Km W of Chieti (51815 inhabitants)
70 Km W of Montesilvano (53738 inhabitants)
74 Km W of Pescara (121014 inhabitants)
82 Km NE of Velletri (53303 inhabitants)
84 Km NE of Roma (2864731 inhabitants)
91 Km SE of Foligno (57155 inhabitants)
97 Km NE of Aprilia (73446 inhabitants)
98 Km NE of Pomezia (62966 inhabitants)
99 Km NE of Latina (125985 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 3.3
ML-VAX 2.7
1985-05-20
17:59:42
42.29 13.35 8 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 6859
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-05-20 17:59:42 ± 0.384
Latitude 42.29 ± 0.02
Longitude 13.35 ± 0.03
Depth (km) 8 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 6859

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) 3414.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00065
Epicentral distance of station farthest from the epicenter (degree) 0.01668
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

Md:3.3

Field Value
Value 3.3
Uncertainty
Num. used stations 7
Type of magnitude Md
Reference to an origin 6859
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:11:08

ML:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 6
Type of magnitude ML
Reference to an origin 6859
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AR1.Z. 1985-05-20T18:00:23.00 10.0 undecidable manual SN 346 0.0112 0.08 0.5
--.AS1.Z. 1985-05-20T18:00:15.50 10.0 undecidable manual SG 326 0.0083 1.18 0.3
--.SOR.Z. 1985-05-20T18:00:14.70 10.0 undecidable manual PN 156 0.0167 0.46 1.7
--.CH1.Z. 1985-05-20T18:00:13.00 10.0 undecidable manual PN 322 0.0151 1.2 1
--.MA1.Z. 1985-05-20T18:00:11.60 10.0 undecidable manual PN 275 0.0146 0.59 0.9
--.AR1.Z. 1985-05-20T18:00:07.00 10.0 undecidable manual PN 346 0.0112 1.25 0.6
--.AM1.Z. 1985-05-20T18:00:06.60 10.0 undecidable manual PN 8 0.0114 0.45 1.1
--.SGG.Z. 1985-05-20T18:00:06.40 10.0 positive manual PN 139 0.0106 1.44 0.9
--.SD1.Z. 1985-05-20T18:00:05.50 10.0 undecidable manual SG 149 0.0061 -0.8 0.4
--.MSC.Z. 1985-05-20T18:00:05.70 10.0 positive manual PN 156 0.0107 0.63 1
--.DUI.Z. 1985-05-20T18:00:01.00 10.0 undecidable manual PG 127 0.0093 -1.88 0.2
--.AS1.Z. 1985-05-20T18:00:00.20 10.0 undecidable manual PG 326 0.0083 -0.59 1.2
--.ALP.Z. 1985-05-20T18:00:00.60 10.0 undecidable manual SG 18 0.0046 -0.54 0.7
--.CM2.Z. 1985-05-20T17:59:59.20 10.0 undecidable manual PG 350 0.0082 -1.37 0.6
--.MNS.Z. 1985-05-20T17:59:59.00 10.0 undecidable manual SG 280 0.0045 -1.76 0.1
--.SD1.Z. 1985-05-20T17:59:54.30 10.0 undecidable manual PG 149 0.0061 -1.85 0.3
--.ALP.Z. 1985-05-20T17:59:52.00 10.0 positive manual PG 18 0.0046 -1.17 1.5
--.MNS.Z. 1985-05-20T17:59:52.20 10.0 positive manual PG 280 0.0045 -0.75 2.2
--.PO9.Z. 1985-05-20T17:59:51.30 10.0 positive manual PG 313 0.0036 0.01 2.8
--.AQU.Z. 1985-05-20T17:59:47.20 10.0 undecidable manual SG 31 0.0006 0.99 0.4
--.AQU.Z. 1985-05-20T17:59:45.00 10.0 positive manual PG 31 0.0006 0.45 2.6
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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