Earthquake with magnitude of Md 2.5 on date 07-04-1985 and time 02:14:00 (UTC) in region 3 km E Potenza Picena (MC)

A magnitude Md 2.5 earthquake occured in region: 3 km E Potenza Picena (MC), on

  • 07-04-1985 02:14:00 (UTC)
  • 07-04-1985 04:14:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.38, 13.66 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
Potenza Picena MC 3 15936 15936
Porto Recanati MC 6 12531 28467
Montecosaro MC 7 7113 35580
Montelupone MC 8 3596 39176
Loreto AN 8 12814 51990
Morrovalle MC 9 10195 62185
Recanati MC 9 21349 83534
Civitanova Marche MC 10 41983 125517
Castelfidardo AN 13 18733 144250
Porto Sant'Elpidio FM 15 26152 170402
Montegranaro FM 16 12990 183392
Numana AN 16 3775 187167
Monte San Giusto MC 16 8191 195358
Sant'Elpidio a Mare FM 16 17110 212468
Sirolo AN 17 4051 216519
Montecassiano MC 18 7125 223644
Montefano MC 18 3541 227185
Macerata MC 18 42473 269658
Corridonia MC 18 15430 285088
Osimo AN 19 34977 320065
Monte Urano FM 19 8353 328418
Camerano AN 19 7322 335740

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km SE of Ancona (100861 inhabitants)
73 Km SE of Fano (60888 inhabitants)
80 Km N of Teramo (54892 inhabitants)
84 Km SE of Pesaro (94582 inhabitants)
90 Km NE 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 2.5 1985-04-07
02:14:00
43.38 13.66 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 4209
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-07 02:14:00 ± 1.078
Latitude 43.38 ± 0.05
Longitude 13.66 ± 0.08
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 4209

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) 8400.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 266
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
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) 0.00478
Epicentral distance of station farthest from the epicenter (degree) 0.01133
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 4209
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:08:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CH1.Z. 1985-04-07T02:14:41.00 10.0 undecidable manual SN 281 0.0113 0.06 0.7
--.AQU.Z. 1985-04-07T02:14:36.00 10.0 undecidable manual SN 189 0.0093 0.43 0.7
--.PO9.Z. 1985-04-07T02:14:35.00 10.0 undecidable manual SG? 212 0.0086 2 0
--.AS1.Z. 1985-04-07T02:14:29.50 10.0 undecidable manual SG 246 0.0071 1.67 0.2
--.CH1.Z. 1985-04-07T02:14:25.00 10.0 undecidable manual PN 281 0.0113 1.18 0.8
--.MNS.Z. 1985-04-07T02:14:22.50 10.0 undecidable manual PN 215 0.0109 -0.73 1.3
--.AQU.Z. 1985-04-07T02:14:21.50 10.0 undecidable manual PN 189 0.0093 0.78 1.4
--.PO9.Z. 1985-04-07T02:14:19.00 10.0 undecidable manual PG 212 0.0086 -0.23 1.9
--.AR1.Z. 1985-04-07T02:14:19.50 10.0 undecidable manual SG 283 0.0048 0.09 0.8
--.AS1.Z. 1985-04-07T02:14:14.50 10.0 undecidable manual PG 246 0.0071 -1.75 0.4
--.AR1.Z. 1985-04-07T02:14:11.00 10.0 undecidable manual PG 283 0.0048 -0.39 1.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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