ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of Md 2.5 on date 10-08-1985 and time 16:50:46 (Italy) in region 2 km SW Sant'Eusanio Forconese (AQ)

A magnitude Md 2.5 earthquake occured in region: 2 km SW Sant'Eusanio Forconese (AQ), on

  • 10-08-1985 14:50:46 (UTC)
  • 10-08-1985 16:50:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.28, 13.51 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
Sant'Eusanio Forconese AQ 2 394 394
Villa Sant'Angelo AQ 2 424 818
Fossa AQ 3 721 1539
Ocre AQ 3 1167 2706
San Demetrio ne' Vestini AQ 4 1854 4560
Rocca di Cambio AQ 5 533 5093
Poggio Picenze AQ 5 1136 6229
Fagnano Alto AQ 6 418 6647
Rocca di Mezzo AQ 8 1526 8173
Prata d'Ansidonia AQ 8 496 8669
Barisciano AQ 9 1828 10497
Fontecchio AQ 10 369 10866
San Pio delle Camere AQ 12 661 11527
L'Aquila AQ 12 69753 81280
Tione degli Abruzzi AQ 13 310 81590
Santo Stefano di Sessanio AQ 13 111 81701
Caporciano AQ 14 230 81931
Lucoli AQ 14 1011 82942
Carapelle Calvisio AQ 14 87 83029
Castelvecchio Calvisio AQ 15 153 83182
Ovindoli AQ 16 1227 84409
Calascio AQ 16 137 84546
Tornimparte AQ 17 3187 87733
Navelli AQ 19 554 88287
Secinaro AQ 20 359 88646

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km SE of L'Aquila (69753 inhabitants)
45 Km SW of Teramo (54892 inhabitants)
55 Km W of Chieti (51815 inhabitants)
59 Km W of Montesilvano (53738 inhabitants)
61 Km W of Pescara (121014 inhabitants)
68 Km NE of Tivoli (56533 inhabitants)
72 Km E of Guidonia Montecelio (88673 inhabitants)
78 Km E of Terni (111501 inhabitants)
89 Km NE of Velletri (53303 inhabitants)
95 Km E of Roma (2864731 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 2.5 1985-08-10
14:50:46
42.28 13.51 8 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 11459
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-08-10 14:50:46 ± 0.284
Latitude 42.28 ± 0.01
Longitude 13.51 ± 0.02
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 11459

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) 2045.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 153
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00097
Epicentral distance of station farthest from the epicenter (degree) 0.00899
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:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 11459
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:14:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AS1.Z. 1985-08-10T14:51:22.00 10.0 undecidable manual SG 321 0.009 0.5 0.4
--.CM2.Z. 1985-08-10T14:51:19.70 10.0 undecidable manual SG 343 0.0085 -0.1 0.9
--.RDP.Z. 1985-08-10T14:51:14.50 10.0 undecidable manual SG 228 0.007 0.04 0.6
--.AS1.Z. 1985-08-10T14:51:08.00 10.0 undecidable manual PG 321 0.009 1.09 0.2
--.PO9.Z. 1985-08-10T14:51:06.00 10.0 undecidable manual SG 305 0.0046 0.3 0.6
--.ALP.Z. 1985-08-10T14:51:05.50 10.0 undecidable manual SG 4 0.0045 0.14 0.7
--.CM2.Z. 1985-08-10T14:51:04.90 10.0 undecidable manual PG 343 0.0085 -1.02 0.4
--.RDP.Z. 1985-08-10T14:51:03.50 10.0 undecidable manual PG 228 0.007 0.66 0.9
--.SD1.Z. 1985-08-10T14:50:59.50 10.0 undecidable manual PG 158 0.0054 -0.1 1.7
--.MNS.Z. 1985-08-10T14:50:59.00 10.0 undecidable manual PG 279 0.0056 -0.8 0.7
--.ALP.Z. 1985-08-10T14:50:57.70 10.0 undecidable manual PG 4 0.0045 0.11 3.4
--.PO9.Z. 1985-08-10T14:50:57.00 10.0 undecidable manual PG 305 0.0046 -0.78 0.8
--.AQU.Z. 1985-08-10T14:50:50.00 10.0 undecidable manual PG 312 0.001 0.09 1.7
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