Earthquake with magnitude of Md 2.1 on date 11-08-1985 and time 01:52:08 (Italy) in region 2 km NW Ocre (AQ)

A magnitude Md 2.1 earthquake occured in region: 2 km NW Ocre (AQ), on

  • 10-08-1985 23:52:08 (UTC)
  • 11-08-1985 01:52:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3, 13.46 at 16 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
Ocre AQ 2 1167 1167
Fossa AQ 3 721 1888
Sant'Eusanio Forconese AQ 6 394 2282
L'Aquila AQ 7 69753 72035
Poggio Picenze AQ 8 1136 73171
Rocca di Cambio AQ 8 533 73704
Villa Sant'Angelo AQ 8 424 74128
San Demetrio ne' Vestini AQ 9 1854 75982
Lucoli AQ 10 1011 76993
Fagnano Alto AQ 11 418 77411
Rocca di Mezzo AQ 12 1526 78937
Barisciano AQ 12 1828 80765
Tornimparte AQ 13 3187 83952
Prata d'Ansidonia AQ 13 496 84448
Fontecchio AQ 15 369 84817
Santo Stefano di Sessanio AQ 17 111 84928
San Pio delle Camere AQ 17 661 85589
Scoppito AQ 18 3727 89316
Tione degli Abruzzi AQ 18 310 89626
Caporciano AQ 19 230 89856
Carapelle Calvisio AQ 19 87 89943
Castelvecchio Calvisio AQ 19 153 90096
Ovindoli AQ 19 1227 91323
Pizzoli AQ 20 4326 95649

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km SE of L'Aquila (69753 inhabitants)
45 Km SW of Teramo (54892 inhabitants)
59 Km W of Chieti (51815 inhabitants)
62 Km W of Montesilvano (53738 inhabitants)
65 Km W of Pescara (121014 inhabitants)
66 Km NE of Tivoli (56533 inhabitants)
69 Km E of Guidonia Montecelio (88673 inhabitants)
72 Km E of Terni (111501 inhabitants)
88 Km NE of Velletri (53303 inhabitants)
92 Km NE of Roma (2864731 inhabitants)
95 Km SE of Foligno (57155 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 2.1 1985-08-10
23:52:08
42.3 13.46 16 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 11489
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-08-10 23:52:08 ± 1.063
Latitude 42.30 ± 0.05
Longitude 13.46 ± 0.06
Depth (km) 16 ± 10 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 11489

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) 7480.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 192
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.00057
Epicentral distance of station farthest from the epicenter (degree) 0.00688
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 11489
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:14:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.RDP.Z. 1985-08-10T23:52:36.00 10.0 undecidable manual SG 225 0.0069 0.55 0.6
--.MNS.Z. 1985-08-10T23:52:27.50 10.0 undecidable manual SG 278 0.0052 -1.78 0.1
--.RDP.Z. 1985-08-10T23:52:25.00 10.0 undecidable manual PG 225 0.0069 0.86 1.1
--.SD1.Z. 1985-08-10T23:52:21.00 10.0 undecidable manual PG 155 0.0057 -0.85 1.2
--.MNS.Z. 1985-08-10T23:52:20.00 10.0 undecidable manual PG 278 0.0052 -0.59 1.7
--.PO9.Z. 1985-08-10T23:52:20.00 10.0 undecidable manual PG? 305 0.0041 1.45 0.2
--.AQU.Z. 1985-08-10T23:52:12.00 10.0 undecidable manual PG 323 0.0006 -0.05 2.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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