Earthquake with magnitude of Md 2.4 on date 26-02-1985 and time 05:49:01 (Italy) in region 7 km NE L'Aquila (AQ)

A magnitude Md 2.4 earthquake occured in region: 7 km NE L'Aquila (AQ), on

  • 26-02-1985 04:49:01 (UTC)
  • 26-02-1985 05:49:01 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.41, 13.43 at 22 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
Pizzoli AQ 11 4326 74079
Barete AQ 13 737 74816
Poggio Picenze AQ 14 1136 75952
Fossa AQ 14 721 76673
Ocre AQ 15 1167 77840
Scoppito AQ 15 3727 81567
Crognaleto TE 16 1297 82864
Lucoli AQ 16 1011 83875
Capitignano AQ 16 665 84540
Sant'Eusanio Forconese AQ 16 394 84934
Pietracamela TE 16 271 85205
Barisciano AQ 16 1828 87033
Campotosto AQ 17 542 87575
Tornimparte AQ 17 3187 90762
Cagnano Amiterno AQ 18 1369 92131
San Demetrio ne' Vestini AQ 18 1854 93985
Fano Adriano TE 18 296 94281
Villa Sant'Angelo AQ 18 424 94705
Montereale AQ 19 2581 97286
Santo Stefano di Sessanio AQ 20 111 97397

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)
60 Km W of Montesilvano (53738 inhabitants)
61 Km W of Chieti (51815 inhabitants)
65 Km W of Pescara (121014 inhabitants)
66 Km E of Terni (111501 inhabitants)
72 Km NE of Tivoli (56533 inhabitants)
74 Km NE of Guidonia Montecelio (88673 inhabitants)
85 Km SE of Foligno (57155 inhabitants)
97 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 2.4 1985-02-26
04:49:01
42.41 13.43 22 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 2569
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-26 04:49:01 ± 0.387
Latitude 42.41 ± 0.03
Longitude 13.43 ± 0.02
Depth (km) 22 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 2569

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) 4329.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 213
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) 0.00057
Epicentral distance of station farthest from the epicenter (degree) 0.0072
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:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 2569
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:07:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CM8.Z. 1985-02-26T04:49:29.60 10.0 undecidable manual SN 345 0.0072 0.51 0.2
--.MNS.Z. 1985-02-26T04:49:22.00 10.0 undecidable manual SG 267 0.0049 0.24 0.6
--.CM8.Z. 1985-02-26T04:49:16.60 10.0 undecidable manual PN 345 0.0072 -0.91 0.2
--.PO9.Z. 1985-02-26T04:49:16.80 10.0 undecidable manual SG 294 0.0035 -0.06 0.6
--.MNS.Z. 1985-02-26T04:49:13.00 10.0 undecidable manual PG 267 0.0049 -0.27 1
--.PO9.Z. 1985-02-26T04:49:10.50 10.0 undecidable manual PG 294 0.0035 0.05 1.5
--.AQU.Z. 1985-02-26T04:49:08.50 10.0 undecidable manual SG 198 0.0006 -0.39 0.8
--.AQU.Z. 1985-02-26T04:49:06.00 10.0 positive manual PG 198 0.0006 0.16 3.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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