Earthquake with magnitude of Md 2.2 on date 25-02-1985 and time 01:44:17 (Italy) in region 6 km NE L'Aquila (AQ)

A magnitude Md 2.2 earthquake occured in region: 6 km NE L'Aquila (AQ), on

  • 25-02-1985 00:44:17 (UTC)
  • 25-02-1985 01:44:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.39, 13.45 at 24 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
L'Aquila AQ 7 69753 69753
Poggio Picenze AQ 11 1136 70889
Fossa AQ 12 721 71610
Ocre AQ 12 1167 72777
Sant'Eusanio Forconese AQ 13 394 73171
Barisciano AQ 14 1828 74999
Pizzoli AQ 14 4326 79325
San Demetrio ne' Vestini AQ 15 1854 81179
Lucoli AQ 15 1011 82190
Villa Sant'Angelo AQ 15 424 82614
Barete AQ 16 737 83351
Scoppito AQ 16 3727 87078
Pietracamela TE 17 271 87349
Tornimparte AQ 17 3187 90536
Santo Stefano di Sessanio AQ 17 111 90647
Crognaleto TE 17 1297 91944
Rocca di Cambio AQ 18 533 92477
Prata d'Ansidonia AQ 18 496 92973
Fagnano Alto AQ 18 418 93391
Fano Adriano TE 19 296 93687
Capitignano AQ 19 665 94352
Campotosto AQ 20 542 94894

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km NE of L'Aquila (69753 inhabitants)
36 Km SW of Teramo (54892 inhabitants)
59 Km W of Montesilvano (53738 inhabitants)
59 Km W of Chieti (51815 inhabitants)
63 Km W of Pescara (121014 inhabitants)
69 Km E of Terni (111501 inhabitants)
72 Km NE of Tivoli (56533 inhabitants)
74 Km NE of Guidonia Montecelio (88673 inhabitants)
88 Km SE of Foligno (57155 inhabitants)
96 Km NE of Velletri (53303 inhabitants)
97 Km NE 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 2.2 1985-02-25
00:44:17
42.39 13.45 24 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 2469
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-25 00:44:17 ± 0.282
Latitude 42.39 ± 0.03
Longitude 13.45 ± 0.02
Depth (km) 24 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 2469

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) 3287.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 239
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00049
Epicentral distance of station farthest from the epicenter (degree) 0.00745
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 2469
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:07:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CM8.Z. 1985-02-25T00:44:44.90 10.0 undecidable manual SN 344 0.0074 0.27 0.8
--.MNS.Z. 1985-02-25T00:44:38.00 10.0 undecidable manual SG 269 0.0051 0.01 0.9
--.PO9.Z. 1985-02-25T00:44:33.00 10.0 undecidable manual SG 295 0.0037 -0.35 0.6
--.CM8.Z. 1985-02-25T00:44:32.60 10.0 undecidable manual PN 344 0.0074 -0.42 0.8
--.MNS.Z. 1985-02-25T00:44:29.00 10.0 undecidable manual PG 269 0.0051 -0.18 1.9
--.PO9.Z. 1985-02-25T00:44:27.00 10.0 undecidable manual PG 295 0.0037 0.5 0.8
--.AQU.Z. 1985-02-25T00:44:24.50 10.0 undecidable manual SG 223 0.0005 -0.49 0.3
--.AQU.Z. 1985-02-25T00:44:21.90 10.0 undecidable manual PG 223 0.0005 0.22 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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