Earthquake with magnitude of Md 3.1 on date 23-06-1985 and time 14:22:25 (UTC) in region 4 km S Filottrano (AN)

A magnitude Md 3.1 earthquake occured in region: 4 km S Filottrano (AN), on

  • 23-06-1985 14:22:25 (UTC)
  • 23-06-1985 16:22:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.404, 13.355 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
Filottrano AN 4 9499 9499
Appignano MC 4 4213 13712
Montefano MC 7 3541 17253
Montecassiano MC 8 7125 24378
Treia MC 11 9403 33781
Santa Maria Nuova AN 11 4179 37960
Cingoli MC 12 10352 48312
Staffolo AN 14 2253 50565
Osimo AN 14 34977 85542
Macerata MC 14 42473 128015
Polverigi AN 14 4508 132523
Pollenza MC 15 6618 139141
Offagna AN 16 1935 141076
San Paolo di Jesi AN 16 933 142009
Recanati MC 16 21349 163358
Agugliano AN 16 4865 168223
Jesi AN 16 40399 208622
Castelfidardo AN 17 18733 227355
Apiro MC 18 2280 229635
Montelupone MC 18 3596 233231
Castelbellino AN 19 4947 238178
Monte Roberto AN 20 3061 241239
Camerata Picena AN 20 2567 243806
Monsano AN 20 3405 247211
Cupramontana AN 20 4756 251967

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SW of Ancona (100861 inhabitants)
56 Km SE of Fano (60888 inhabitants)
67 Km SE of Pesaro (94582 inhabitants)
73 Km NE of Foligno (57155 inhabitants)
85 Km E of Perugia (166134 inhabitants)
88 Km NW of Teramo (54892 inhabitants)
97 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
Bulletin
Rev1000
Md 3.1
ML-VAX 3.1
1985-06-23
14:22:25
43.404 13.355 4 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 8999
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-06-23 14:22:25 ± 0.242
Latitude 43.4040 ± 0.0149
Longitude 13.3550 ± 0.0190
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 8999

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) 2254.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 115
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) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00202
Epicentral distance of station farthest from the epicenter (degree) 0.0289
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 8999
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:12:54

ML:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 8999
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.FO1.Z. 1985-06-23T14:23:15.50 10.0 undecidable manual PN 353 0.0289 -0.61 0.3
--.PS9.Z. 1985-06-23T14:23:01.50 10.0 undecidable manual PN 279 0.0186 1.02 0.2
--.PO9.Z. 1985-06-23T14:22:57.50 10.0 undecidable manual SG 200 0.0079 1.11 0.2
--.SD1.Z. 1985-06-23T14:22:56.50 10.0 undecidable manual PN 168 0.0155 0.79 0.4
--.ALP.Z. 1985-06-23T14:22:49.80 10.0 undecidable manual SG 166 0.0057 1.12 0.2
--.CH1.Z. 1985-06-23T14:22:47.00 10.0 undecidable manual PG 282 0.0094 0.86 0.4
--.AS1.Z. 1985-06-23T14:22:46.50 10.0 undecidable manual SG 236 0.0055 -1.3 0.1
--.PO9.Z. 1985-06-23T14:22:42.80 10.0 positive manual PG 200 0.0079 -0.34 2.1
--.ALP.Z. 1985-06-23T14:22:38.00 10.0 negative manual PG 166 0.0057 -0.69 1.3
--.AS1.Z. 1985-06-23T14:22:37.50 10.0 negative manual PG 236 0.0055 -0.69 1.3
--.AR1.Z. 1985-06-23T14:22:37.50 10.0 undecidable manual SG 287 0.0028 0.27 0.7
--.CM2.Z. 1985-06-23T14:22:35.60 10.0 undecidable manual SG 216 0.0023 0.34 0.6
--.AR1.Z. 1985-06-23T14:22:32.00 10.0 negative manual PG 287 0.0028 -0.09 2.4
--.CM2.Z. 1985-06-23T14:22:31.10 10.0 undecidable manual PG 216 0.0023 0.16 2.3
--.AM1.Z. 1985-06-23T14:22:30.30 10.0 undecidable manual PG 50 0.002 0.04 2.4
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download