Earthquake with magnitude of Md 2.5 on date 12-12-1986 and time 15:28:19 (UTC) in region 4 km W Appignano (MC)

A magnitude Md 2.5 earthquake occured in region: 4 km W Appignano (MC), on

  • 12-12-1986 15:28:19 (UTC)
  • 12-12-1986 16:28:19 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.36, 13.29 at 5 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
Appignano MC 4 4213 4213
Treia MC 6 9403 13616
Cingoli MC 6 10352 23968
Filottrano AN 9 9499 33467
Pollenza MC 12 6618 40085
Staffolo AN 12 2253 42338
Montecassiano MC 12 7125 49463
Montefano MC 13 3541 53004
Apiro MC 13 2280 55284
San Paolo di Jesi AN 14 933 56217
Macerata MC 15 42473 98690
Santa Maria Nuova AN 15 4179 102869
Cupramontana AN 17 4756 107625
Tolentino MC 17 20069 127694
Poggio San Vicino MC 17 246 127940
San Severino Marche MC 18 12726 140666
Monte Roberto AN 18 3061 143727
Castelbellino AN 18 4947 148674
Jesi AN 18 40399 189073
Maiolati Spontini AN 19 6248 195321
Urbisaglia MC 20 2628 197949
Polverigi AN 20 4508 202457

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km SW of Ancona (100861 inhabitants)
58 Km SE of Fano (60888 inhabitants)
66 Km NE of Foligno (57155 inhabitants)
68 Km SE of Pesaro (94582 inhabitants)
79 Km E of Perugia (166134 inhabitants)
85 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
Rev 1000 Md 2.5 1986-12-12
15:28:19
43.36 13.29 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 38119
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-12-12 15:28:19 ± 0.971
Latitude 43.36 ± 0.02
Longitude 13.29 ± 0.06
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 38119

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) 5844.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 299
Number of associated phases, regardless of their use for origin computation 5
Number of defining phases 5
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) 0.00251
Epicentral distance of station farthest from the epicenter (degree) 0.00899
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 38119
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:38:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CRE.Z. 1986-12-12T15:28:40.50 10.0 undecidable manual PG 284 0.009 0.82 0.4
--.ASS.Z. 1986-12-12T15:28:39.50 10.0 undecidable manual SG 237 0.0049 -0.56 0.4
--.ASS.Z. 1986-12-12T15:28:31.50 10.0 undecidable manual PG 237 0.0049 0.18 1.5
--.ARV.Z. 1986-12-12T15:28:31.00 10.0 undecidable manual SG 297 0.0025 0.44 0.7
--.ARV.Z. 1986-12-12T15:28:25.30 10.0 negative manual PG 297 0.0025 -0.53 2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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