Earthquake with magnitude of Md 2.7 on date 07-04-1985 and time 03:04:19 (UTC) in region Costa Marchigiana Maceratese (Macerata)

A magnitude Md 2.7 earthquake occured in region: Costa Marchigiana Maceratese (Macerata), on

  • 07-04-1985 03:04:19 (UTC)
  • 07-04-1985 05:04:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.45, 13.75 at 4 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 7 12531 12531
Loreto AN 12 12814 25345
Numana AN 13 3775 29120
Potenza Picena MC 14 15936 45056
Sirolo AN 14 4051 49107
Civitanova Marche MC 16 41983 91090
Castelfidardo AN 17 18733 109823
Recanati MC 17 21349 131172
Montecosaro MC 17 7113 138285
Camerano AN 19 7322 145607
Montelupone MC 19 3596 149203

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SE of Ancona (100861 inhabitants)
74 Km SE of Fano (60888 inhabitants)
85 Km SE of Pesaro (94582 inhabitants)
88 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 2.7 1985-04-07
03:04:19
43.45 13.75 4 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 4229
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-07 03:04:19 ± 0.374
Latitude 43.45 ± 0.02
Longitude 13.75 ± 0.03
Depth (km) 4 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 4229

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) 3465.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 225
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.0013
Epicentral distance of station farthest from the epicenter (degree) 0.01562
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:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 4229
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:08:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MNS.Z. 1985-04-07T03:05:02.00 10.0 undecidable manual SN 216 0.0118 -0.73 0.3
--.PO9.Z. 1985-04-07T03:04:56.00 10.0 undecidable manual SG 214 0.0095 -0.15 0.6
--.AS1.Z. 1985-04-07T03:04:51.00 10.0 undecidable manual SG 244 0.0079 0.2 0.7
--.SD1.Z. 1985-04-07T03:04:50.50 10.0 undecidable manual PN 178 0.0156 0.41 1
--.MNS.Z. 1985-04-07T03:04:45.20 10.0 undecidable manual PN 216 0.0118 0.85 0.5
--.CH1.Z. 1985-04-07T03:04:44.00 10.0 undecidable manual PN 278 0.0118 -0.33 1.2
--.ALP.Z. 1985-04-07T03:04:44.00 10.0 undecidable manual SG 191 0.0061 -0.14 1
--.AQU.Z. 1985-04-07T03:04:42.00 10.0 undecidable manual PN 193 0.01 0.36 1.3
--.AR1.Z. 1985-04-07T03:04:41.00 10.0 undecidable manual SG 275 0.0053 -0.2 1
--.PO9.Z. 1985-04-07T03:04:41.50 10.0 undecidable manual PG 214 0.0095 0.95 0.5
--.AS1.Z. 1985-04-07T03:04:37.50 10.0 undecidable manual PG 244 0.0079 0.04 1.8
--.ALP.Z. 1985-04-07T03:04:32.30 10.0 undecidable manual PG 191 0.0061 -1.32 0.2
--.AR1.Z. 1985-04-07T03:04:31.50 10.0 undecidable manual PG 275 0.0053 -0.42 1.4
--.AM1.Z. 1985-04-07T03:04:25.90 10.0 undecidable manual SG 313 0.0013 0.74 0.5
--.AM1.Z. 1985-04-07T03:04:22.30 10.0 undecidable manual PG 313 0.0013 -0.36 3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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