Earthquake with magnitude of Md 3.2 on date 20-07-1985 and time 10:25:17 (UTC) in region 2 km NW Porto Sant'Elpidio (FM)

A magnitude Md 3.2 earthquake occured in region: 2 km NW Porto Sant'Elpidio (FM), on

  • 20-07-1985 10:25:17 (UTC)
  • 20-07-1985 12:25:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.28, 13.75 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
Porto Sant'Elpidio FM 2 26152 26152
Civitanova Marche MC 4 41983 68135
Sant'Elpidio a Mare FM 7 17110 85245
Monte Urano FM 10 8353 93598
Montecosaro MC 10 7113 100711
Montegranaro FM 10 12990 113701
Porto San Giorgio FM 11 16121 129822
Fermo FM 13 37655 167477
Monte San Giusto MC 13 8191 175668
Morrovalle MC 14 10195 185863
Potenza Picena MC 14 15936 201799
Torre San Patrizio FM 15 2048 203847
Monte San Pietrangeli FM 16 2458 206305
Montelupone MC 16 3596 209901
Rapagnano FM 18 2145 212046
Porto Recanati MC 18 12531 224577
Lapedona FM 19 1166 225743
Altidona FM 19 3390 229133
Francavilla d'Ete FM 19 964 230097
Corridonia MC 20 15430 245527

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km SE of Ancona (100861 inhabitants)
69 Km N of Teramo (54892 inhabitants)
86 Km SE of Fano (60888 inhabitants)
91 Km NW of Montesilvano (53738 inhabitants)
92 Km E of Foligno (57155 inhabitants)
97 Km SE of Pesaro (94582 inhabitants)
98 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 3.2 1985-07-20
10:25:17
43.28 13.75 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 10449
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-07-20 10:25:17 ± 0.419
Latitude 43.28 ± 0.02
Longitude 13.75 ± 0.04
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 10449

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) 4096.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 182
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.00259
Epicentral distance of station farthest from the epicenter (degree) 0.02825
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

Md:3.2

Field Value
Value 3.2
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 10449
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:14:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CTI.Z. 1985-07-20T10:26:07.50 10.0 undecidable manual PN 332 0.0283 0.63 0.7
--.MNS.Z. 1985-07-20T10:25:57.50 10.0 undecidable manual SN 221 0.0106 1.17 0.4
--.PO9.Z. 1985-07-20T10:25:50.00 10.0 undecidable manual SG 220 0.0082 1 0.6
--.DUI.Z. 1985-07-20T10:25:48.00 10.0 undecidable manual PN 161 0.0153 0.96 0.8
--.AS1.Z. 1985-07-20T10:25:47.50 10.0 undecidable manual SG 255 0.0074 1.41 0.3
--.SD1.Z. 1985-07-20T10:25:45.80 10.0 undecidable manual PN 178 0.0141 0.57 1.2
--.MNS.Z. 1985-07-20T10:25:39.00 10.0 undecidable manual PN 221 0.0106 -0.98 1
--.AQU.Z. 1985-07-20T10:25:37.00 10.0 undecidable manual PG 195 0.0086 0.51 1.6
--.PO9.Z. 1985-07-20T10:25:35.00 10.0 undecidable manual PG 220 0.0082 -0.75 1.3
--.ALP.Z. 1985-07-20T10:25:35.70 10.0 undecidable manual SG 194 0.0046 -0.36 1
--.AS1.Z. 1985-07-20T10:25:33.50 10.0 undecidable manual PG 255 0.0074 -0.57 1.5
--.ALP.Z. 1985-07-20T10:25:26.70 10.0 undecidable manual PG 194 0.0046 -1.58 0.4
--.CM2.Z. 1985-07-20T10:25:26.20 10.0 undecidable manual PG 259 0.004 -0.88 1.2
--.AM1.Z. 1985-07-20T10:25:24.10 10.0 undecidable manual PG 338 0.0026 -0.09 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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