Earthquake with magnitude of Md 2.4 on date 28-07-1985 and time 14:12:20 (Italy) in region 4 km E Montegallo (AP)

A magnitude Md 2.4 earthquake occured in region: 4 km E Montegallo (AP), on

  • 28-07-1985 12:12:20 (UTC)
  • 28-07-1985 14:12:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.85, 13.38 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
Montegallo AP 4 523 523
Montemonaco AP 7 604 1127
Roccafluvione AP 8 2010 3137
Palmiano AP 9 196 3333
Acquasanta Terme AP 10 2916 6249
Venarotta AP 10 2066 8315
Montefortino FM 10 1178 9493
Arquata del Tronto AP 11 1178 10671
Comunanza AP 12 3166 13837
Amandola FM 14 3629 17466
Force AP 16 1354 18820
Valle Castellana TE 16 977 19797
Ascoli Piceno AP 17 49407 69204
Montefalcone Appennino FM 17 424 69628
Smerillo FM 18 365 69993
Castelsantangelo sul Nera MC 19 281 70274
Rotella AP 19 906 71180
Bolognola MC 20 142 71322

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km NW of Teramo (54892 inhabitants)
56 Km N of L'Aquila (69753 inhabitants)
56 Km E of Foligno (57155 inhabitants)
68 Km E of Terni (111501 inhabitants)
74 Km NW of Montesilvano (53738 inhabitants)
81 Km NW of Pescara (121014 inhabitants)
85 Km E of Perugia (166134 inhabitants)
86 Km NW of Chieti (51815 inhabitants)
86 Km S of Ancona (100861 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 1985-07-28
12:12:20
42.85 13.38 5 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 10999
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-07-28 12:12:20 ± 0.196
Latitude 42.85 ± 0.01
Longitude 13.38 ± 0.02
Depth (km) 5 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 10999

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) 2052.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 143
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
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) 0.00138
Epicentral distance of station farthest from the epicenter (degree) 0.00639
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 10999
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:14:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AR1.Z. 1985-07-28T12:12:47.50 10.0 undecidable manual SG 334 0.0064 0.89 0.1
--.AS1.Z. 1985-07-28T12:12:42.00 10.0 undecidable manual SG 291 0.0051 0.18 0.6
--.PO9.Z. 1985-07-28T12:12:38.00 10.0 undecidable manual SG 229 0.0038 0.96 0.2
--.AR1.Z. 1985-07-28T12:12:36.00 10.0 undecidable manual PG 334 0.0064 0.36 1.1
--.CM2.Z. 1985-07-28T12:12:35.90 10.0 undecidable manual SG 333 0.0034 0.51 0.7
--.AS1.Z. 1985-07-28T12:12:32.00 10.0 undecidable manual PG 291 0.0051 -0.87 0.4
--.PO9.Z. 1985-07-28T12:12:29.70 10.0 undecidable manual PG 229 0.0038 -0.41 1.3
--.CM2.Z. 1985-07-28T12:12:28.90 10.0 positive manual PG 333 0.0034 -0.26 3.1
--.ALP.Z. 1985-07-28T12:12:27.30 10.0 undecidable manual SG 117 0.0014 0.35 0.8
--.ALP.Z. 1985-07-28T12:12:24.20 10.0 undecidable manual PG 117 0.0014 -0.09 1.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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