Earthquake with magnitude of Md 2.2 on date 22-04-1985 and time 11:05:35 (Italy) in region 7 km W Arcevia (AN)

A magnitude Md 2.2 earthquake occured in region: 7 km W Arcevia (AN), on

  • 22-04-1985 09:05:35 (UTC)
  • 22-04-1985 11:05:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.5, 12.86 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
Arcevia AN 7 4612 4612
Pergola PU 7 6333 10945
Serra Sant'Abbondio PU 7 1027 11972
Sassoferrato AN 8 7285 19257
Frontone PU 10 1300 20557
Genga AN 10 1797 22354
San Lorenzo in Campo PU 13 3414 25768
Serra San Quirico AN 14 2850 28618
Fratte Rosa PU 15 966 29584
Mergo AN 15 1037 30621
Castelleone di Suasa AN 15 1676 32297
Serra de' Conti AN 15 3746 36043
Barbara AN 16 1368 37411
Montecarotto AN 17 1987 39398
Rosora AN 17 1985 41383
Cagli PU 18 8731 50114
Poggio San Marcello AN 18 693 50807
Castelplanio AN 18 3540 54347
Cantiano PU 19 2245 56592
Scheggia e Pascelupo PG 19 1393 57985
Fabriano AN 19 31480 89465
Acqualagna PU 20 4393 93858
Ostra Vetere AN 20 3311 97169
Barchi PU 20 967 98136
Costacciaro PG 20 1216 99352

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km SW of Fano (60888 inhabitants)
46 Km S of Pesaro (94582 inhabitants)
55 Km W of Ancona (100861 inhabitants)
58 Km NE of Perugia (166134 inhabitants)
62 Km N of Foligno (57155 inhabitants)
66 Km SE of Rimini (147750 inhabitants)
79 Km E of Arezzo (99543 inhabitants)
86 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 2.2 1985-04-22
09:05:35
43.5 12.86 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 5259
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-22 09:05:35 ± 1.955
Latitude 43.50 ± 0.11
Longitude 12.86 ± 0.16
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 5259

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) 17865.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 256
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00049
Epicentral distance of station farthest from the epicenter (degree) 0.00834
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:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 5259
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:09:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.PO9.Z. 1985-04-22T09:06:07.00 10.0 undecidable manual SG 176 0.0083 -0.66 0.6
--.PO9.Z. 1985-04-22T09:05:58.00 10.0 undecidable manual PG? 176 0.0083 3.78 0
--.AS1.Z. 1985-04-22T09:05:50.50 10.0 undecidable manual SG 198 0.0041 -2.23 0.3
--.AS1.Z. 1985-04-22T09:05:46.00 10.0 undecidable manual PG 198 0.0041 0.4 2.2
--.AR1.Z. 1985-04-22T09:05:40.00 10.0 undecidable manual SG 95 0.0005 -0.04 0.9
--.AR1.Z. 1985-04-22T09:05:37.50 10.0 undecidable manual PG 95 0.0005 -0.77 2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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