Earthquake with magnitude of Md 2.5 on date 23-02-1985 and time 06:03:18 (Italy) in region 4 km E Pizzoli (AQ)

A magnitude Md 2.5 earthquake occured in region: 4 km E Pizzoli (AQ), on

  • 23-02-1985 05:03:18 (UTC)
  • 23-02-1985 06:03:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.44, 13.35 at 14 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
Pizzoli AQ 4 4326 4326
Barete AQ 6 737 5063
Capitignano AQ 10 665 5728
Cagnano Amiterno AQ 10 1369 7097
Scoppito AQ 11 3727 10824
L'Aquila AQ 11 69753 80577
Montereale AQ 13 2581 83158
Campotosto AQ 13 542 83700
Crognaleto TE 16 1297 84997
Lucoli AQ 17 1011 86008
Tornimparte AQ 17 3187 89195
Borbona RI 19 617 89812
Pietracamela TE 19 271 90083
Fossa AQ 20 721 90804
Fano Adriano TE 20 296 91100

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km NW of L'Aquila (69753 inhabitants)
38 Km SW of Teramo (54892 inhabitants)
59 Km E of Terni (111501 inhabitants)
66 Km W of Montesilvano (53738 inhabitants)
68 Km W of Chieti (51815 inhabitants)
70 Km NE of Tivoli (56533 inhabitants)
71 Km NE of Guidonia Montecelio (88673 inhabitants)
71 Km W of Pescara (121014 inhabitants)
78 Km SE of Foligno (57155 inhabitants)
94 Km NE of Roma (2864731 inhabitants)
96 Km NE of Velletri (53303 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 1985-02-23
05:03:18
42.44 13.35 14 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 2239
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-23 05:03:18 ± 0.504
Latitude 42.44 ± 0.04
Longitude 13.35 ± 0.04
Depth (km) 14 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 2239

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) 5401.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 165
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) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00081
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:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 2239
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CM8.Z. 1985-02-23T05:03:46.30 10.0 undecidable manual SG 348 0.0069 1.06 0.1
--.SD1.Z. 1985-02-23T05:03:35.00 10.0 undecidable manual PG 154 0.0072 0.25 0.9
--.CM8.Z. 1985-02-23T05:03:33.10 10.0 undecidable manual PG 348 0.0069 -0.9 0.2
--.MNS.Z. 1985-02-23T05:03:29.00 10.0 undecidable manual PG 263 0.0045 0.05 1.3
--.AQU.Z. 1985-02-23T05:03:24.50 10.0 undecidable manual SG 155 0.0008 0 0.8
--.AQU.Z. 1985-02-23T05:03:22.00 10.0 positive manual PG 155 0.0008 -0.02 2.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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