Earthquake with magnitude of Md 2.3 on date 21-06-1985 and time 02:21:53 (UTC) in region 1 km N Filottrano (AN)

A magnitude Md 2.3 earthquake occured in region: 1 km N Filottrano (AN), on

  • 21-06-1985 02:21:53 (UTC)
  • 21-06-1985 04:21:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.45, 13.35 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 1 9499 9499
Santa Maria Nuova AN 6 4179 13678
Montefano MC 8 3541 17219
Polverigi AN 9 4508 21727
Appignano MC 9 4213 25940
Agugliano AN 11 4865 30805
Osimo AN 11 34977 65782
Offagna AN 11 1935 67717
Montecassiano MC 12 7125 74842
Jesi AN 12 40399 115241
Staffolo AN 13 2253 117494
Cingoli MC 14 10352 127846
San Paolo di Jesi AN 14 933 128779
Camerata Picena AN 15 2567 131346
Monsano AN 15 3405 134751
Treia MC 16 9403 144154
Castelfidardo AN 16 18733 162887
Recanati MC 17 21349 184236
Chiaravalle AN 17 14796 199032
Castelbellino AN 17 4947 203979
Monte Roberto AN 18 3061 207040
Monte San Vito AN 18 6848 213888
Macerata MC 18 42473 256361
San Marcello AN 19 2057 258418
Camerano AN 19 7322 265740
Apiro MC 19 2280 268020
Maiolati Spontini AN 19 6248 274268
Cupramontana AN 19 4756 279024
Falconara Marittima AN 20 26565 305589
Pollenza MC 20 6618 312207

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SW of Ancona (100861 inhabitants)
51 Km SE of Fano (60888 inhabitants)
62 Km SE of Pesaro (94582 inhabitants)
76 Km NE of Foligno (57155 inhabitants)
87 Km E of Perugia (166134 inhabitants)
92 Km NW of Teramo (54892 inhabitants)
93 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
02:21:53
43.45 13.35 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 8809
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-06-21 02:21:53 ± 0.183
Latitude 43.45 ± 0.02
Longitude 13.35 ± 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 8809

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) 2338.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 141
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00186
Epicentral distance of station farthest from the epicenter (degree) 0.00826
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 8809
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
--.PO9.Z. 1985-06-21T02:22:24.00 10.0 undecidable manual SG 199 0.0083 -0.61 0.2
--.ALP.Z. 1985-06-21T02:22:18.00 10.0 undecidable manual SG 166 0.0062 1.01 0.1
--.AS1.Z. 1985-06-21T02:22:14.50 10.0 undecidable manual SG 233 0.0057 -0.96 0
--.PO9.Z. 1985-06-21T02:22:11.50 10.0 undecidable manual PG 199 0.0083 0.23 1
--.ALP.Z. 1985-06-21T02:22:06.50 10.0 undecidable manual PG 166 0.0062 -0.37 1
--.AS1.Z. 1985-06-21T02:22:05.50 10.0 undecidable manual PG 233 0.0057 -0.49 0.8
--.CM2.Z. 1985-06-21T02:22:05.00 10.0 undecidable manual SG 210 0.0027 0.47 0.5
--.AR1.Z. 1985-06-21T02:22:05.50 10.0 undecidable manual SG 279 0.0027 0.88 0.1
--.AM1.Z. 1985-06-21T02:22:01.80 10.0 undecidable manual SG 60 0.0019 0.17 0.9
--.CM2.Z. 1985-06-21T02:21:59.60 10.0 undecidable manual PG 210 0.0027 -0.07 3.1
--.AR1.Z. 1985-06-21T02:21:59.80 10.0 undecidable manual PG 279 0.0027 0.08 1.6
--.AM1.Z. 1985-06-21T02:21:57.80 10.0 negative manual PG 60 0.0019 -0.2 2.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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