Earthquake with magnitude of Md 3.1 on date 07-04-1985 and time 12:15:51 (Italy) in region Costa Marchigiana Maceratese (Macerata)

A magnitude Md 3.1 earthquake occured in region: Costa Marchigiana Maceratese (Macerata), on

  • 07-04-1985 10:15:51 (UTC)
  • 07-04-1985 12:15:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.48, 13.76 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 Recanati MC 9 12531 12531
Numana AN 11 3775 16306
Sirolo AN 12 4051 20357
Loreto AN 13 12814 33171
Potenza Picena MC 17 15936 49107
Castelfidardo AN 17 18733 67840
Camerano AN 17 7322 75162
Recanati MC 19 21349 96511
Civitanova Marche MC 20 41983 138494

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km SE of Ancona (100861 inhabitants)
72 Km SE of Fano (60888 inhabitants)
83 Km SE of Pesaro (94582 inhabitants)
92 Km N of Teramo (54892 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 3.1 1985-04-07
10:15:51
43.48 13.76 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 4329
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-07 10:15:51 ± 0.631
Latitude 43.48 ± 0.03
Longitude 13.76 ± 0.05
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 4329

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) 5328
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 193
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.9
Epicentral distance of station closest to the epicenter (degree) 0.00113
Epicentral distance of station farthest from the epicenter (degree) 0.02663
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:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 4329
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:08:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CTI.Z. 1985-04-07T10:16:39.50 10.0 undecidable manual PN 330 0.0266 0.99 0.7
--.MNS.Z. 1985-04-07T10:16:36.00 10.0 undecidable manual SN 215 0.0121 1.68 0.2
--.AQU.Z. 1985-04-07T10:16:30.00 10.0 undecidable manual SN 192 0.0104 0.27 0.7
--.PO9.Z. 1985-04-07T10:16:29.00 10.0 undecidable manual SN 213 0.0097 0.98 0.5
--.DUI.Z. 1985-04-07T10:16:25.00 10.0 undecidable manual PN 163 0.017 1.22 0.8
--.AS1.Z. 1985-04-07T10:16:24.50 10.0 undecidable manual SG 242 0.0081 1.75 0.2
--.SD1.Z. 1985-04-07T10:16:22.50 10.0 undecidable manual PN 178 0.0159 0.39 1.3
--.CH1.Z. 1985-04-07T10:16:18.50 10.0 undecidable manual PN? 276 0.0118 2.63 0
--.MNS.Z. 1985-04-07T10:16:17.00 10.0 undecidable manual PN 215 0.0121 0.68 1.4
--.ALP.Z. 1985-04-07T10:16:15.80 10.0 undecidable manual SG 191 0.0064 -0.8 0.9
--.AQU.Z. 1985-04-07T10:16:14.00 10.0 undecidable manual PN 192 0.0104 0.34 1.7
--.AR1.Z. 1985-04-07T10:16:13.00 10.0 undecidable manual SG 271 0.0053 0.39 0.7
--.PO9.Z. 1985-04-07T10:16:13.50 10.0 undecidable manual PN 213 0.0097 0.82 1.4
--.AS1.Z. 1985-04-07T10:16:08.50 10.0 undecidable manual PG 242 0.0081 -1.14 1.1
--.ALP.Z. 1985-04-07T10:16:04.30 10.0 negative manual PG 191 0.0064 -1.79 1.1
--.AR1.Z. 1985-04-07T10:16:03.50 10.0 undecidable manual PG 271 0.0053 -0.28 1.8
--.AM1.Z. 1985-04-07T10:15:57.60 10.0 undecidable manual SG 301 0.0011 -0.25 1.1
--.AM1.Z. 1985-04-07T10:15:54.20 10.0 undecidable manual PG 301 0.0011 -1.06 2.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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