Earthquake with magnitude of Md 2.3 on date 18-04-1985 and time 05:31:08 (UTC) in region 1 km E Arsita (TE)

A magnitude Md 2.3 earthquake occured in region: 1 km E Arsita (TE), on

  • 18-04-1985 05:31:08 (UTC)
  • 18-04-1985 07:31:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.51, 13.8 at 10 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
Arsita TE 2 829 829
Bisenti TE 2 1952 2781
Castiglione Messer Raimondo TE 7 2324 5105
Farindola PE 7 1518 6623
Castelli TE 8 1159 7782
Montefino TE 8 1027 8809
Castel Castagna TE 8 500 9309
Cermignano TE 9 1649 10958
Castilenti TE 10 1508 12466
Cellino Attanasio TE 10 2520 14986
Penna Sant'Andrea TE 10 1698 16684
Colledara TE 11 2179 18863
Basciano TE 11 2434 21297
Montebello di Bertona PE 11 991 22288
Penne PE 12 12267 34555
Isola del Gran Sasso d'Italia TE 12 4773 39328
Tossicia TE 13 1406 40734
Elice PE 14 1712 42446
Villa Celiera PE 15 681 43127
Canzano TE 16 1934 45061
Picciano PE 16 1351 46412
Atri TE 16 10772 57184
Montorio al Vomano TE 16 8218 65402
Castel del Monte AQ 17 413 65815
Loreto Aprutino PE 17 7479 73294
Civitella Casanova PE 17 1815 75109
Collecorvino PE 18 5997 81106
Notaresco TE 19 6907 88013
Teramo TE 19 54892 142905
Castellalto TE 19 7513 150418
Villa Santa Lucia degli Abruzzi AQ 20 123 150541
Carpineto della Nora PE 20 662 151203
Morro d'Oro TE 20 3661 154864

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km SE of Teramo (54892 inhabitants)
28 Km W of Montesilvano (53738 inhabitants)
34 Km W of Pescara (121014 inhabitants)
35 Km NW of Chieti (51815 inhabitants)
38 Km E of L'Aquila (69753 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 2.3 1985-04-18
05:31:08
42.51 13.8 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 4869
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-18 05:31:08 ± 0.154
Latitude 42.51 ± 0.01
Longitude 13.80 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 4869

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) 1517.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 212
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) 0.00283
Epicentral distance of station farthest from the epicenter (degree) 0.00753
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:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 4869
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:09:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MNS.Z. 1985-04-18T05:31:37.00 10.0 undecidable manual SG 261 0.0075 0.1 0.5
--.SD1.Z. 1985-04-18T05:31:36.00 10.0 undecidable manual SG 179 0.0071 0.34 0.2
--.SD1.Z. 1985-04-18T05:31:24.00 10.0 undecidable manual PG 179 0.0071 -0.02 1.5
--.MNS.Z. 1985-04-18T05:31:24.50 10.0 undecidable manual PG 261 0.0075 -0.23 0.8
--.ALP.Z. 1985-04-18T05:31:20.80 10.0 undecidable manual SG 327 0.0028 0.41 0.1
--.ALP.Z. 1985-04-18T05:31:15.10 10.0 undecidable manual PG 327 0.0028 -0.1 2.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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