Earthquake with magnitude of Md 2.5 on date 21-03-1985 and time 12:39:22 (Italy) in region 1 km SE Mergo (AN)

A magnitude Md 2.5 earthquake occured in region: 1 km SE Mergo (AN), on

  • 21-03-1985 11:39:22 (UTC)
  • 21-03-1985 12:39:22 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.46, 13.05 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
Mergo AN 1 1037 1037
Rosora AN 3 1985 3022
Serra San Quirico AN 3 2850 5872
Castelplanio AN 5 3540 9412
Cupramontana AN 6 4756 14168
Poggio San Marcello AN 6 693 14861
Maiolati Spontini AN 6 6248 21109
Montecarotto AN 7 1987 23096
Monte Roberto AN 8 3061 26157
Castelbellino AN 9 4947 31104
Serra de' Conti AN 9 3746 34850
Arcevia AN 10 4612 39462
Genga AN 10 1797 41259
Poggio San Vicino MC 10 246 41505
San Paolo di Jesi AN 10 933 42438
Apiro MC 10 2280 44718
Staffolo AN 12 2253 46971
Barbara AN 13 1368 48339
Sassoferrato AN 16 7285 55624
Ostra Vetere AN 16 3311 58935
Belvedere Ostrense AN 16 2234 61169
Cerreto d'Esi AN 17 3817 64986
Cingoli MC 17 10352 75338
Castelleone di Suasa AN 17 1676 77014
Jesi AN 17 40399 117413
San Lorenzo in Campo PU 18 3414 120827
San Marcello AN 18 2057 122884
Fabriano AN 18 31480 154364
Ostra AN 19 6875 161239
Monsano AN 20 3405 164644

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km W of Ancona (100861 inhabitants)
43 Km S of Fano (60888 inhabitants)
51 Km S of Pesaro (94582 inhabitants)
63 Km NE of Foligno (57155 inhabitants)
66 Km NE of Perugia (166134 inhabitants)
77 Km SE of Rimini (147750 inhabitants)
94 Km E of Arezzo (99543 inhabitants)
99 Km SE of Cesena (96758 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 1985-03-21
11:39:22
43.46 13.05 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 3449
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-03-21 11:39:22 ± 0.043
Latitude 43.46 ± 0.00
Longitude 13.05 ± 0.00
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 3449

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) 318.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 281
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
Epicentral distance of station closest to the epicenter (degree) 0.00073
Epicentral distance of station farthest from the epicenter (degree) 0.00729
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 3449
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:08:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AS1.Z. 1985-03-21T11:39:40.00 10.0 undecidable manual SG 215 0.0044 0 0.4
--.CH1.Z. 1985-03-21T11:39:38.50 10.0 undecidable manual PG 281 0.0073 0.05 0.7
--.AS1.Z. 1985-03-21T11:39:32.50 10.0 undecidable manual PG 215 0.0044 0 1
--.AR1.Z. 1985-03-21T11:39:27.00 10.0 undecidable manual SG 294 0.0007 -0.02 0.7
--.AR1.Z. 1985-03-21T11:39:25.00 10.0 undecidable manual PG 294 0.0007 -0.01 2.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download