ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of Md 2.8 on date 09-08-1985 and time 01:17:21 (Italy) in region E Ripatransone (AP)

A magnitude Md 2.8 earthquake occured in region: E Ripatransone (AP), on

  • 08-08-1985 23:17:21 (UTC)
  • 09-08-1985 01:17:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43, 13.77 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 0 4309 4309
Montefiore dell'Aso AP 6 2123 6432
Massignano AP 6 1638 8070
Cossignano AP 7 978 9048
Acquaviva Picena AP 7 3831 12879
Carassai AP 8 1100 13979
Cupra Marittima AP 8 5398 19377
Grottammare AP 8 16006 35383
Offida AP 10 5058 40441
Campofilone FM 10 1916 42357
Moresco FM 10 598 42955
Monterubbiano FM 10 2230 45185
Monteprandone AP 11 12655 57840
San Benedetto del Tronto AP 11 47303 105143
Monsampolo del Tronto AP 12 4611 109754
Petritoli FM 12 2335 112089
Castorano AP 12 2380 114469
Altidona FM 12 3390 117859
Lapedona FM 12 1166 119025
Spinetoli AP 12 7215 126240
Monte Vidon Combatte FM 12 433 126673
Pedaso FM 12 2800 129473
Montalto delle Marche AP 13 2122 131595
Ortezzano FM 13 774 132369
Castignano AP 14 2796 135165
Colli del Tronto AP 14 3668 138833
Appignano del Tronto AP 14 1785 140618
Ponzano di Fermo FM 14 1674 142292
Monte Giberto FM 15 801 143093
Montedinove AP 15 488 143581
Castel di Lama AP 15 8634 152215
Monte Rinaldo FM 16 379 152594
Montottone FM 16 979 153573
Colonnella TE 16 3734 157307
Controguerra TE 17 2436 159743
Rotella AP 18 906 160649
Martinsicuro TE 18 16033 176682
Grottazzolina FM 18 3398 180080
Ancarano TE 18 1857 181937
Fermo FM 18 37655 219592
Monsampietro Morico FM 19 659 220251
Montelparo FM 19 778 221029
Torano Nuovo TE 20 1611 222640
Maltignano AP 20 2401 225041
Sant'Egidio alla Vibrata TE 20 9811 234852
Corropoli TE 20 5045 239897

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km N of Teramo (54892 inhabitants)
62 Km NW of Montesilvano (53738 inhabitants)
70 Km NW of Pescara (121014 inhabitants)
72 Km S of Ancona (100861 inhabitants)
78 Km NE of L'Aquila (69753 inhabitants)
79 Km NW of Chieti (51815 inhabitants)
87 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 2.8 1985-08-08
23:17:21
43 13.77 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 11389
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-08-08 23:17:21 ± 0.466
Latitude 43.00 ± 0.03
Longitude 13.77 ± 0.03
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 11389

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) 4445
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 214
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) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00664
Epicentral distance of station farthest from the epicenter (degree) 0.02202
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

Md:2.8

Field Value
Value 2.8
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 11389
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:14:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SD1.Z. 1985-08-08T23:18:03.00 10.0 undecidable manual SN 178 0.0116 -0.07 0.8
--.SOR.Z. 1985-08-08T23:18:01.00 10.0 undecidable manual PN 169 0.022 -0.63 1.1
--.TR9.Z. 1985-08-08T23:17:59.00 10.0 undecidable manual PN 149 0.0201 0.38 1.4
--.MNS.Z. 1985-08-08T23:17:57.00 10.0 undecidable manual SG 232 0.0091 0.83 0.5
--.SGG.Z. 1985-08-08T23:17:52.10 10.0 undecidable manual PN 163 0.0151 1.16 0.6
--.AS1.Z. 1985-08-08T23:17:51.50 10.0 undecidable manual SG 274 0.0073 1.45 0.1
--.CH1.Z. 1985-08-08T23:17:48.50 10.0 undecidable manual PN 295 0.0131 0.46 1.7
--.DUI.Z. 1985-08-08T23:17:48.00 10.0 undecidable manual PN? 158 0.0129 0.37 0.7
--.SD1.Z. 1985-08-08T23:17:44.80 10.0 undecidable manual PN 178 0.0116 -0.87 1.1
--.MNS.Z. 1985-08-08T23:17:41.00 10.0 undecidable manual PG 232 0.0091 -0.68 1.4
--.PO9.Z. 1985-08-08T23:17:37.00 10.0 undecidable manual PG 234 0.0066 0.27 1.9
--.AS1.Z. 1985-08-08T23:17:37.00 10.0 undecidable manual PG 274 0.0073 -1.14 0.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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