Earthquake with magnitude of Md 2.3 on date 21-06-1985 and time 04:44:49 (UTC) in region 2 km SW Filottrano (AN)

A magnitude Md 2.3 earthquake occured in region: 2 km SW Filottrano (AN), on

  • 21-06-1985 04:44:49 (UTC)
  • 21-06-1985 06:44:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.42, 13.33 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
Filottrano AN 2 9499 9499
Appignano MC 7 4213 13712
Santa Maria Nuova AN 8 4179 17891
Montefano MC 9 3541 21432
Cingoli MC 11 10352 31784
Montecassiano MC 11 7125 38909
Staffolo AN 11 2253 41162
Treia MC 13 9403 50565
Polverigi AN 13 4508 55073
San Paolo di Jesi AN 13 933 56006
Jesi AN 13 40399 96405
Agugliano AN 14 4865 101270
Osimo AN 14 34977 136247
Offagna AN 15 1935 138182
Apiro MC 16 2280 140462
Castelbellino AN 16 4947 145409
Monte Roberto AN 17 3061 148470
Monsano AN 17 3405 151875
Macerata MC 17 42473 194348
Cupramontana AN 17 4756 199104
Pollenza MC 17 6618 205722
Camerata Picena AN 17 2567 208289
Maiolati Spontini AN 18 6248 214537
Recanati MC 18 21349 235886
Castelfidardo AN 18 18733 254619
Chiaravalle AN 20 14796 269415
San Marcello AN 20 2057 271472

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SW of Ancona (100861 inhabitants)
53 Km SE of Fano (60888 inhabitants)
64 Km SE of Pesaro (94582 inhabitants)
73 Km NE of Foligno (57155 inhabitants)
84 Km E of Perugia (166134 inhabitants)
90 Km NW of Teramo (54892 inhabitants)
94 Km SE of Rimini (147750 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 2.3 1985-06-21
04:44:49
43.42 13.33 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 8819
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-06-21 04:44:49 ± 0.2
Latitude 43.42 ± 0.02
Longitude 13.33 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 8819

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) 2424.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 132
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
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) 0.0021
Epicentral distance of station farthest from the epicenter (degree) 0.00801
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:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 8819
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:12:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ALP.Z. 1985-06-21T04:45:14.50 10.0 undecidable manual SG 164 0.006 1.19 0
--.PO9.Z. 1985-06-21T04:45:07.00 10.0 undecidable manual PG 198 0.008 -0.68 0.4
--.ALP.Z. 1985-06-21T04:45:03.50 10.0 undecidable manual PG 164 0.006 0.05 1.2
--.AS1.Z. 1985-06-21T04:45:02.00 10.0 undecidable manual PG 234 0.0054 -0.4 0.9
--.AR1.Z. 1985-06-21T04:45:02.00 10.0 undecidable manual SG 285 0.0026 0.81 0.2
--.CM2.Z. 1985-06-21T04:45:00.76 10.0 undecidable manual SG 210 0.0023 0.25 0.8
--.AM1.Z. 1985-06-21T04:44:59.88 10.0 undecidable manual SG 57 0.0021 0.42 0.6
--.AR1.Z. 1985-06-21T04:44:56.00 10.0 undecidable manual PG 285 0.0026 -0.45 1
--.CM2.Z. 1985-06-21T04:44:55.72 10.0 negative manual PG 210 0.0023 -0.34 2.4
--.AM1.Z. 1985-06-21T04:44:55.13 10.0 undecidable manual PG 57 0.0021 -0.33 2.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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