Earthquake with magnitude of Md 2.4 on date 07-04-1985 and time 01:20:00 (UTC) in region Costa Marchigiana Anconetana (Ancona)

A magnitude Md 2.4 earthquake occured in region: Costa Marchigiana Anconetana (Ancona), on

  • 07-04-1985 01:20:00 (UTC)
  • 07-04-1985 03:20:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.56, 13.7 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
Sirolo AN 8 4051 4051
Numana AN 8 3775 7826
Camerano AN 12 7322 15148
Porto Recanati MC 15 12531 27679
Loreto AN 15 12814 40493
Ancona AN 16 100861 141354
Castelfidardo AN 16 18733 160087
Osimo AN 20 34977 195064

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km E of Ancona (100861 inhabitants)
63 Km SE of Fano (60888 inhabitants)
74 Km SE of Pesaro (94582 inhabitants)
100 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 2.4 1985-04-07
01:20:00
43.56 13.7 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 4199
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-07 01:20:00 ± 0.934
Latitude 43.56 ± 0.05
Longitude 13.70 ± 0.06
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 4199

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) 7658
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 276
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
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) 0.00065
Epicentral distance of station farthest from the epicenter (degree) 0.01247
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:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 4199
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
--.MNS.Z. 1985-04-07T01:20:45.00 10.0 undecidable manual SN 212 0.0125 1.33 0.3
--.AQU.Z. 1985-04-07T01:20:41.00 10.0 undecidable manual SN 190 0.011 1.3 0.3
--.CH1.Z. 1985-04-07T01:20:41.50 10.0 undecidable manual SN 273 0.0114 0.7 0.6
--.AS1.Z. 1985-04-07T01:20:30.00 10.0 undecidable manual SG 237 0.0082 -1.25 0.3
--.MNS.Z. 1985-04-07T01:20:25.50 10.0 undecidable manual PN 212 0.0125 0.26 1.6
--.CH1.Z. 1985-04-07T01:20:24.50 10.0 undecidable manual PN 273 0.0114 0.91 1.1
--.AQU.Z. 1985-04-07T01:20:23.00 10.0 undecidable manual PN 190 0.011 0.04 1.8
--.AR1.Z. 1985-04-07T01:20:21.00 10.0 undecidable manual SG 263 0.0049 1.22 0.4
--.AS1.Z. 1985-04-07T01:20:17.00 10.0 undecidable manual PG 237 0.0082 -1.07 1.2
--.AR1.Z. 1985-04-07T01:20:12.00 10.0 undecidable manual PG 263 0.0049 0.55 1.8
--.AM1.Z. 1985-04-07T01:20:04.30 10.0 undecidable manual SG 262 0.0006 -0.24 1.2
--.AM1.Z. 1985-04-07T01:20:01.10 10.0 undecidable manual PG 262 0.0006 -1.55 1.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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