Earthquake with magnitude of Md 2.6 on date 04-08-1985 and time 03:34:45 (Italy) in region 2 km E Ripatransone (AP)

A magnitude Md 2.6 earthquake occured in region: 2 km E Ripatransone (AP), on

  • 04-08-1985 01:34:45 (UTC)
  • 04-08-1985 03:34:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.99, 13.79 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
Ripatransone AP 2 4309 4309
Acquaviva Picena AP 6 3831 8140
Grottammare AP 7 16006 24146
Massignano AP 7 1638 25784
Cupra Marittima AP 7 5398 31182
Montefiore dell'Aso AP 8 2123 33305
Cossignano AP 8 978 34283
Monteprandone AP 9 12655 46938
San Benedetto del Tronto AP 9 47303 94241
Carassai AP 10 1100 95341
Offida AP 10 5058 100399
Campofilone FM 10 1916 102315
Monsampolo del Tronto AP 10 4611 106926
Castorano AP 11 2380 109306
Spinetoli AP 11 7215 116521
Moresco FM 12 598 117119
Monterubbiano FM 12 2230 119349
Pedaso FM 13 2800 122149
Colli del Tronto AP 13 3668 125817
Altidona FM 13 3390 129207
Lapedona FM 13 1166 130373
Petritoli FM 14 2335 132708
Appignano del Tronto AP 14 1785 134493
Monte Vidon Combatte FM 14 433 134926
Castignano AP 15 2796 137722
Colonnella TE 15 3734 141456
Montalto delle Marche AP 15 2122 143578
Castel di Lama AP 15 8634 152212
Controguerra TE 15 2436 154648
Ortezzano FM 15 774 155422
Martinsicuro TE 16 16033 171455
Ponzano di Fermo FM 16 1674 173129
Montedinove AP 17 488 173617
Monte Giberto FM 17 801 174418
Monte Rinaldo FM 17 379 174797
Ancarano TE 18 1857 176654
Montottone FM 18 979 177633
Corropoli TE 19 5045 182678
Torano Nuovo TE 19 1611 184289
Rotella AP 19 906 185195
Nereto TE 19 5242 190437
Sant'Egidio alla Vibrata TE 19 9811 200248
Maltignano AP 19 2401 202649
Fermo FM 20 37655 240304

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km N of Teramo (54892 inhabitants)
61 Km NW of Montesilvano (53738 inhabitants)
68 Km NW of Pescara (121014 inhabitants)
73 Km SE of Ancona (100861 inhabitants)
78 Km NW of Chieti (51815 inhabitants)
78 Km NE of L'Aquila (69753 inhabitants)
88 Km E of Foligno (57155 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 2.6 1985-08-04
01:34:45
42.99 13.79 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 11279
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-08-04 01:34:45 ± 1.118
Latitude 42.99 ± 0.03
Longitude 13.79 ± 0.09
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 11279

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) 7837.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 229
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1
Epicentral distance of station closest to the epicenter (degree) 0.00235
Epicentral distance of station farthest from the epicenter (degree) 0.01328
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

Md:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 11279
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:14:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AS1.Z. 1985-08-04T01:35:15.50 10.0 undecidable manual SG 275 0.0074 1.78 0.2
--.CH1.Z. 1985-08-04T01:35:13.00 10.0 undecidable manual PN? 295 0.0133 1.54 0.2
--.PO9.Z. 1985-08-04T01:35:10.50 10.0 undecidable manual SG 236 0.0067 -0.47 0.6
--.SD1.Z. 1985-08-04T01:35:10.50 10.0 undecidable manual PN 179 0.0115 1.81 0.3
--.MNS.Z. 1985-08-04T01:35:05.00 10.0 undecidable manual PG 233 0.0091 0.04 1.5
--.CM2.Z. 1985-08-04T01:35:04.50 10.0 undecidable manual SG 293 0.0046 1.05 0.7
--.PO9.Z. 1985-08-04T01:35:01.00 10.0 undecidable manual PG 236 0.0067 0.98 1.1
--.AS1.Z. 1985-08-04T01:35:00.50 10.0 undecidable manual PG 275 0.0074 -1.11 1
--.AR1.Z. 1985-08-04T01:35:00.20 10.0 undecidable manual PG 309 0.0071 -0.76 1.3
--.CM2.Z. 1985-08-04T01:34:54.90 10.0 undecidable manual PG 293 0.0046 -0.78 2.6
--.ALP.Z. 1985-08-04T01:34:53.90 10.0 undecidable manual SG 217 0.0023 -1.6 0.4
--.ALP.Z. 1985-08-04T01:34:50.00 10.0 positive manual PG 217 0.0023 -1.08 2.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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