INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of Md 2.9 on date 13-12-1985 and time 18:26:53 (UTC) in region 4 km SW Porto Sant'Elpidio (FM)

A magnitude Md 2.9 earthquake occured in region: 4 km SW Porto Sant'Elpidio (FM), on

  • 13-12-1985 18:26:53 (UTC)
  • 13-12-1985 19:26:53 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.23, 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
Porto Sant'Elpidio FM 4 26152 26152
Sant'Elpidio a Mare FM 4 17110 43262
Monte Urano FM 6 8353 51615
Porto San Giorgio FM 8 16121 67736
Montegranaro FM 8 12990 80726
Fermo FM 8 37655 118381
Civitanova Marche MC 8 41983 160364
Monte San Giusto MC 11 8191 168555
Torre San Patrizio FM 11 2048 170603
Montecosaro MC 12 7113 177716
Monte San Pietrangeli FM 13 2458 180174
Rapagnano FM 14 2145 182319
Lapedona FM 14 1166 183485
Altidona FM 15 3390 186875
Morrovalle MC 15 10195 197070
Ponzano di Fermo FM 16 1674 198744
Magliano di Tenna FM 16 1452 200196
Francavilla d'Ete FM 16 964 201160
Monterubbiano FM 16 2230 203390
Moresco FM 16 598 203988
Grottazzolina FM 17 3398 207386
Potenza Picena MC 17 15936 223322
Pedaso FM 17 2800 226122
Monte Giberto FM 18 801 226923
Corridonia MC 18 15430 242353
Montelupone MC 18 3596 245949
Campofilone FM 18 1916 247865
Petritoli FM 19 2335 250200
Montegiorgio FM 19 6851 257051

Municipalities with at least 50000 inhabitants

An earthquake occurred to
46 Km SE of Ancona (100861 inhabitants)
64 Km N of Teramo (54892 inhabitants)
87 Km NW of Montesilvano (53738 inhabitants)
89 Km SE of Fano (60888 inhabitants)
89 Km E of Foligno (57155 inhabitants)
94 Km NW of Pescara (121014 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 2.9 1985-12-13
18:26:53
43.23 13.73 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 18049
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-12-13 18:26:53 ± 0.299
Latitude 43.23 ± 0.01
Longitude 13.73 ± 0.02
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 18049

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) 2450.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 171
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
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) 0.00291
Epicentral distance of station farthest from the epicenter (degree) 0.03076
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

Md:2.9

Field Value
Value 2.9
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 18049
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:20:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.FO1.Z. 1985-12-13T18:27:48.00 10.0 undecidable manual PN 348 0.0308 0.55 0.7
--.CTI.Z. 1985-12-13T18:27:43.00 10.0 undecidable manual PN 332 0.0286 -1.05 0.4
--.SD1.Z. 1985-12-13T18:27:42.00 10.0 undecidable manual SN 177 0.0137 0.33 0.6
--.MNS.Z. 1985-12-13T18:27:33.50 10.0 undecidable manual SN 222 0.0103 0.83 0.4
--.DUI.Z. 1985-12-13T18:27:24.00 10.0 undecidable manual PN 160 0.0149 0.76 0.9
--.ASS.Z. 1985-12-13T18:27:22.90 10.0 undecidable manual SG 258 0.0072 0.59 0.8
--.SD1.Z. 1985-12-13T18:27:22.00 10.0 undecidable manual PN 177 0.0137 0.65 1.1
--.CRE.Z. 1985-12-13T18:27:20.00 10.0 undecidable manual PN 287 0.0121 1.05 0.6
--.ARV.Z. 1985-12-13T18:27:16.50 10.0 undecidable manual SG 295 0.0057 -0.21 1.1
--.MNS.Z. 1985-12-13T18:27:15.00 10.0 undecidable manual PN 222 0.0103 -1.16 0.5
--.AQU.Z. 1985-12-13T18:27:11.50 10.0 undecidable manual PG 195 0.0082 -0.63 1.3
--.CM2.Z. 1985-12-13T18:27:11.90 10.0 undecidable manual SG 264 0.0038 0.79 0.6
--.ASS.Z. 1985-12-13T18:27:09.80 10.0 positive manual PG 258 0.0072 -0.38 3.3
--.AM1.Z. 1985-12-13T18:27:07.57 10.0 undecidable manual SG 343 0.0029 1.13 0.3
--.ARV.Z. 1985-12-13T18:27:06.50 10.0 undecidable manual PG 295 0.0057 -0.44 1.6
--.CM2.Z. 1985-12-13T18:27:02.91 10.0 undecidable manual PG 264 0.0038 -0.33 1.7
--.AM1.Z. 1985-12-13T18:27:00.33 10.0 undecidable manual PG 343 0.0029 -0.68 1.2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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