Earthquake with magnitude of Md 2.1 on date 15-04-1985 and time 19:34:39 (Italy) in region Costa Marchigiana Fermana (Fermo)

A magnitude Md 2.1 earthquake occured in region: Costa Marchigiana Fermana (Fermo), on

  • 15-04-1985 17:34:39 (UTC)
  • 15-04-1985 19:34:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.17, 13.9 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
Porto San Giorgio FM 9 16121 16121
Pedaso FM 9 2800 18921
Altidona FM 11 3390 22311
Campofilone FM 12 1916 24227
Lapedona FM 12 1166 25393
Fermo FM 15 37655 63048
Porto Sant'Elpidio FM 15 26152 89200
Massignano AP 16 1638 90838
Cupra Marittima AP 17 5398 96236
Moresco FM 17 598 96834
Monterubbiano FM 18 2230 99064
Montefiore dell'Aso AP 18 2123 101187
Sant'Elpidio a Mare FM 19 17110 118297
Monte Urano FM 19 8353 126650

Municipalities with at least 50000 inhabitants

An earthquake occurred to
59 Km SE of Ancona (100861 inhabitants)
59 Km N of Teramo (54892 inhabitants)
76 Km N of Montesilvano (53738 inhabitants)
83 Km NW of Pescara (121014 inhabitants)
94 Km N of Chieti (51815 inhabitants)
100 Km NE of L'Aquila (69753 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 2.1 1985-04-15
17:34:39
43.17 13.9 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 4699
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-15 17:34:39 ± 0.889
Latitude 43.17 ± 0.02
Longitude 13.90 ± 0.08
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 4699

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) 7155.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 241
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
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) 0.00389
Epicentral distance of station farthest from the epicenter (degree) 0.00826
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 4699
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:09:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.PO9.Z. 1985-04-15T17:35:11.00 10.0 undecidable manual SG 229 0.0083 0.45 0.5
--.AR1.Z. 1985-04-15T17:35:05.00 10.0 undecidable manual SG 295 0.0069 -0.69 0.5
--.ALP.Z. 1985-04-15T17:34:57.60 10.0 undecidable manual SG 211 0.0041 1.86 0.1
--.PO9.Z. 1985-04-15T17:34:56.50 10.0 undecidable manual PG 229 0.0083 -0.73 1
--.AM1.Z. 1985-04-15T17:34:56.20 10.0 undecidable manual SG 329 0.0039 1.21 0.4
--.AR1.Z. 1985-04-15T17:34:53.50 10.0 undecidable manual PG 295 0.0069 -0.92 0.9
--.AM1.Z. 1985-04-15T17:34:48.70 10.0 negative manual PG 329 0.0039 0.46 1.5
--.ALP.Z. 1985-04-15T17:34:48.40 10.0 negative manual PG 211 0.0041 -0.29 3.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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