Earthquake with magnitude of Md 2.1 on date 23-04-1985 and time 17:03:14 (Italy) in region 1 km SW Poggio Picenze (AQ)

A magnitude Md 2.1 earthquake occured in region: 1 km SW Poggio Picenze (AQ), on

  • 23-04-1985 15:03:14 (UTC)
  • 23-04-1985 17:03:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.32, 13.54 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
Poggio Picenze AQ 1 1136 1136
Sant'Eusanio Forconese AQ 3 394 1530
San Demetrio ne' Vestini AQ 4 1854 3384
Barisciano AQ 5 1828 5212
Fossa AQ 5 721 5933
Villa Sant'Angelo AQ 5 424 6357
Ocre AQ 6 1167 7524
Prata d'Ansidonia AQ 7 496 8020
Fagnano Alto AQ 8 418 8438
Santo Stefano di Sessanio AQ 10 111 8549
Rocca di Cambio AQ 10 533 9082
San Pio delle Camere AQ 10 661 9743
Fontecchio AQ 11 369 10112
L'Aquila AQ 12 69753 79865
Rocca di Mezzo AQ 12 1526 81391
Carapelle Calvisio AQ 12 87 81478
Castelvecchio Calvisio AQ 13 153 81631
Calascio AQ 13 137 81768
Caporciano AQ 13 230 81998
Tione degli Abruzzi AQ 15 310 82308
Castel del Monte AQ 17 413 82721
Lucoli AQ 17 1011 83732
Navelli AQ 18 554 84286
Ofena AQ 18 506 84792
Tornimparte AQ 20 3187 87979
Capestrano AQ 20 884 88863
Villa Santa Lucia degli Abruzzi AQ 20 123 88986

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km E of L'Aquila (69753 inhabitants)
41 Km SW of Teramo (54892 inhabitants)
52 Km W of Chieti (51815 inhabitants)
55 Km W of Montesilvano (53738 inhabitants)
58 Km W of Pescara (121014 inhabitants)
72 Km NE of Tivoli (56533 inhabitants)
76 Km E of Guidonia Montecelio (88673 inhabitants)
78 Km E of Terni (111501 inhabitants)
94 Km NE of Velletri (53303 inhabitants)
99 Km SE of Foligno (57155 inhabitants)
99 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 2.1 1985-04-23
15:03:14
42.32 13.54 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 5359
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-23 15:03:14 ± 0.705
Latitude 42.32 ± 0.03
Longitude 13.54 ± 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 5359

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) 4097.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 287
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
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) 0.00089
Epicentral distance of station farthest from the epicenter (degree) 0.00453
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 5359
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:09:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.PO9.Z. 1985-04-23T15:03:33.00 10.0 undecidable manual SG 300 0.0045 0.08 0.7
--.ALP.Z. 1985-04-23T15:03:31.20 10.0 undecidable manual SG 2 0.0041 -0.25 1
--.PO9.Z. 1985-04-23T15:03:26.00 10.0 undecidable manual PG 300 0.0045 0.8 0.6
--.ALP.Z. 1985-04-23T15:03:24.50 10.0 negative manual PG 2 0.0041 0.15 1.9
--.AQU.Z. 1985-04-23T15:03:20.00 10.0 undecidable manual SG 290 0.0009 -0.04 0.9
--.AQU.Z. 1985-04-23T15:03:17.00 10.0 undecidable manual PG 290 0.0009 -0.76 0.8
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