Earthquake with magnitude of Md 2.5 on date 28-02-1985 and time 03:44:17 (Italy) in region 4 km W Cagnano Amiterno (AQ)

A magnitude Md 2.5 earthquake occured in region: 4 km W Cagnano Amiterno (AQ), on

  • 28-02-1985 02:44:17 (UTC)
  • 28-02-1985 03:44:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.45, 13.18 at 5 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
Cagnano Amiterno AQ 4 1369 1369
Borbona RI 8 617 1986
Barete AQ 8 737 2723
Antrodoco RI 9 2588 5311
Pizzoli AQ 10 4326 9637
Montereale AQ 10 2581 12218
Micigliano RI 10 127 12345
Scoppito AQ 11 3727 16072
Posta RI 11 694 16766
Borgo Velino RI 11 972 17738
Capitignano AQ 13 665 18403
Castel Sant'Angelo RI 14 1308 19711
Cittareale RI 19 482 20193
Petrella Salto RI 20 1197 21390
Campotosto AQ 20 542 21932

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km NW of L'Aquila (69753 inhabitants)
46 Km E of Terni (111501 inhabitants)
49 Km W of Teramo (54892 inhabitants)
62 Km NE of Guidonia Montecelio (88673 inhabitants)
63 Km NE of Tivoli (56533 inhabitants)
69 Km SE of Foligno (57155 inhabitants)
80 Km W of Montesilvano (53738 inhabitants)
82 Km W of Chieti (51815 inhabitants)
84 Km NE of Roma (2864731 inhabitants)
85 Km W of Pescara (121014 inhabitants)
88 Km E of Viterbo (67173 inhabitants)
91 Km NE of Velletri (53303 inhabitants)
98 Km SE of Perugia (166134 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 1985-02-28
02:44:17
42.45 13.18 5 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 2729
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-28 02:44:17 ± 0.341
Latitude 42.45 ± 0.01
Longitude 13.18 ± 0.04
Depth (km) 5 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 2729

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) 3119.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 210
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) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.0017
Epicentral distance of station farthest from the epicenter (degree) 0.00785
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:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 2729
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:07:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SD1.Z. 1985-02-28T02:44:48.50 10.0 undecidable manual SG 147 0.0079 0.18 0.3
--.CM8.Z. 1985-02-28T02:44:44.30 10.0 undecidable manual SG 358 0.0066 0.18 0.4
--.SD1.Z. 1985-02-28T02:44:35.10 10.0 undecidable manual PG 147 0.0079 -0.12 0.9
--.CM8.Z. 1985-02-28T02:44:32.70 10.0 negative manual PG 358 0.0066 -0.09 2.3
--.AQU.Z. 1985-02-28T02:44:24.50 10.0 undecidable manual SG 120 0.0017 -0.3 0.2
--.AQU.Z. 1985-02-28T02:44:21.80 10.0 positive manual PG 120 0.0017 0.16 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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