Earthquake with magnitude of Md 2.4 on date 21-08-1985 and time 07:09:28 (UTC) in region 1 km E Castel di Lama (AP)

A magnitude Md 2.4 earthquake occured in region: 1 km E Castel di Lama (AP), on

  • 21-08-1985 07:09:28 (UTC)
  • 21-08-1985 09:09:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.87, 13.73 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
Castel di Lama AP 1 8634 8634
Colli del Tronto AP 2 3668 12302
Ancarano TE 3 1857 14159
Castorano AP 4 2380 16539
Sant'Egidio alla Vibrata TE 5 9811 26350
Spinetoli AP 5 7215 33565
Maltignano AP 5 2401 35966
Torano Nuovo TE 6 1611 37577
Monsampolo del Tronto AP 6 4611 42188
Appignano del Tronto AP 6 1785 43973
Controguerra TE 8 2436 46409
Offida AP 8 5058 51467
Nereto TE 9 5242 56709
Folignano AP 9 9241 65950
Corropoli TE 10 5045 70995
Monteprandone AP 11 12655 83650
Sant'Omero TE 11 5243 88893
Acquaviva Picena AP 11 3831 92724
Colonnella TE 11 3734 96458
Civitella del Tronto TE 12 5116 101574
Castignano AP 12 2796 104370
Ascoli Piceno AP 13 49407 153777
Cossignano AP 14 978 154755
Bellante TE 15 7152 161907
San Benedetto del Tronto AP 15 47303 209210
Ripatransone AP 15 4309 213519
Martinsicuro TE 15 16033 229552
Campli TE 16 7209 236761
Alba Adriatica TE 16 12353 249114
Tortoreto TE 17 11542 260656
Montedinove AP 17 488 261144
Montalto delle Marche AP 17 2122 263266
Rotella AP 17 906 264172
Grottammare AP 18 16006 280178
Mosciano Sant'Angelo TE 18 9308 289486
Carassai AP 19 1100 290586
Venarotta AP 19 2066 292652

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km N of Teramo (54892 inhabitants)
52 Km NW of Montesilvano (53738 inhabitants)
60 Km NW of Pescara (121014 inhabitants)
63 Km NE of L'Aquila (69753 inhabitants)
68 Km NW of Chieti (51815 inhabitants)
84 Km E of Foligno (57155 inhabitants)
85 Km S of Ancona (100861 inhabitants)
95 Km E of Terni (111501 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 1985-08-21
07:09:28
42.87 13.73 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 12159
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-08-21 07:09:28 ± 0.69
Latitude 42.87 ± 0.02
Longitude 13.73 ± 0.05
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 12159

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) 4611.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 242
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
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) 0.0013
Epicentral distance of station farthest from the epicenter (degree) 0.00818
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 12159
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:15:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AR1.Z. 1985-08-21T07:09:58.50 10.0 undecidable manual SG 317 0.0076 0.03 0.6
--.AM1.Z. 1985-08-21T07:09:54.00 10.0 undecidable manual SG 352 0.0062 0.77 0.3
--.MNS.Z. 1985-08-21T07:09:47.60 10.0 undecidable manual PG? 238 0.0082 0.91 0.1
--.AR1.Z. 1985-08-21T07:09:45.50 10.0 undecidable manual PG 317 0.0076 -0.17 1.5
--.AS1.Z. 1985-08-21T07:09:44.50 10.0 undecidable manual PG 284 0.0073 -0.4 1.2
--.PO9.Z. 1985-08-21T07:09:42.00 10.0 undecidable manual PG 243 0.0058 0.15 1.8
--.AM1.Z. 1985-08-21T07:09:41.80 10.0 undecidable manual PG? 352 0.0062 -0.84 0.2
--.ALP.Z. 1985-08-21T07:09:34.10 10.0 undecidable manual SG 234 0.0013 0 1.1
--.ALP.Z. 1985-08-21T07:09:31.10 10.0 negative manual PG 234 0.0013 -0.5 2.2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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