Earthquake with magnitude of Md 2.8 on date 02-05-1985 and time 21:41:49 (Italy) in region Costa Marchigiana Anconetana (Ancona)

A magnitude Md 2.8 earthquake occured in region: Costa Marchigiana Anconetana (Ancona), on

  • 02-05-1985 19:41:49 (UTC)
  • 02-05-1985 21:41:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.85, 13.28 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
Senigallia AN 16 45027 45027
Mondolfo PU 18 14277 59304
San Costanzo PU 19 4786 64090

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km E of Fano (60888 inhabitants)
30 Km E of Pesaro (94582 inhabitants)
33 Km NW of Ancona (100861 inhabitants)
61 Km E of Rimini (147750 inhabitants)
88 Km E of Cesena (96758 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 2.8 1985-05-02
19:41:49
43.85 13.28 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 5759
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-05-02 19:41:49 ± 0.2
Latitude 43.85 ± 0.01
Longitude 13.28 ± 0.03
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 5759

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) 3072.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 145
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) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.0038
Epicentral distance of station farthest from the epicenter (degree) 0.02477
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitude information

Md:2.8

Field Value
Value 2.8
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 5759
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:10:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.LJU.Z. 1985-05-02T19:42:58.00 10.0 undecidable manual SN 21 0.0212 1.74 0
--.CEY.Z. 1985-05-02T19:42:49.50 10.0 undecidable manual SN 22 0.0185 0.56 0.5
--.FO1.Z. 1985-05-02T19:42:33.80 10.0 undecidable manual PN 352 0.0248 0.2 1.2
--.RBL.Z. 1985-05-02T19:42:32.00 10.0 undecidable manual PN 4 0.0233 0.7 0.8
--.CTI.Z. 1985-05-02T19:42:30.00 10.0 undecidable manual PN 332 0.0223 0.31 1.3
--.LJU.Z. 1985-05-02T19:42:28.30 10.0 undecidable manual PN 21 0.0212 0.19 1.4
--.VOY.Z. 1985-05-02T19:42:25.40 10.0 undecidable manual PN 10 0.0199 -0.77 0.8
--.CEY.Z. 1985-05-02T19:42:23.20 10.0 undecidable manual PN 22 0.0185 -0.68 1
--.CH1.Z. 1985-05-02T19:42:22.50 10.0 undecidable manual SG 256 0.0088 -0.7 0.4
--.TRI.Z. 1985-05-02T19:42:20.50 10.0 undecidable manual PN 10 0.0169 -1.09 0.5
--.MNS.Z. 1985-05-02T19:42:18.00 10.0 undecidable manual PN 196 0.0138 1.27 0.4
--.PO9.Z. 1985-05-02T19:42:14.00 10.0 undecidable manual PN 190 0.0117 0.42 1.5
--.ALP.Z. 1985-05-02T19:42:10.50 10.0 undecidable manual PN 168 0.0098 -0.22 1.7
--.AS1.Z. 1985-05-02T19:42:08.50 10.0 undecidable manual PG 209 0.0082 0.85 0.9
--.CH1.Z. 1985-05-02T19:42:08.80 10.0 undecidable manual PG 256 0.0088 -0.23 1.7
--.AR1.Z. 1985-05-02T19:42:06.00 10.0 undecidable manual SG 214 0.0038 0.64 0.7
--.CM2.Z. 1985-05-02T19:42:02.40 10.0 undecidable manual PG 188 0.006 -0.74 2
--.AR1.Z. 1985-05-02T19:41:58.20 10.0 undecidable manual PG 214 0.0038 -0.52 1.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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