Earthquake with magnitude of Md 2.2 on date 04-06-1985 and time 18:13:36 (Italy) in region 6 km E Acquasparta (TR)

A magnitude Md 2.2 earthquake occured in region: 6 km E Acquasparta (TR), on

  • 04-06-1985 16:13:36 (UTC)
  • 04-06-1985 18:13:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7, 12.62 at 8 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
Acquasparta TR 6 4778 4778
San Gemini TR 11 5018 9796
Spoleto PG 11 38218 48014
Montecastrilli TR 12 5022 53036
Massa Martana PG 12 3770 56806
Castel Ritaldi PG 15 3278 60084
Terni TR 15 111501 171585
Giano dell'Umbria PG 16 3846 175431
Avigliano Umbro TR 16 2558 177989
Montefranco TR 17 1276 179265
Ferentillo TR 17 1913 181178
Arrone TR 18 2763 183941
Scheggino PG 18 461 184402
Sant'Anatolia di Narco PG 19 564 184966
Campello sul Clitunno PG 19 2442 187408
Todi PG 20 16851 204259

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km N of Terni (111501 inhabitants)
30 Km S of Foligno (57155 inhabitants)
49 Km SE of Perugia (166134 inhabitants)
52 Km NE of Viterbo (67173 inhabitants)
75 Km NW of L'Aquila (69753 inhabitants)
78 Km N of Guidonia Montecelio (88673 inhabitants)
83 Km N of Tivoli (56533 inhabitants)
89 Km W of Teramo (54892 inhabitants)
90 Km N of Roma (2864731 inhabitants)
95 Km NE of Civitavecchia (52991 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 1985-06-04
16:13:36
42.7 12.62 8 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 7959
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-06-04 16:13:36 ± 1.23
Latitude 42.70 ± 0.09
Longitude 12.62 ± 0.10
Depth (km) 8 ± 23 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 7959

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) 13009
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 161
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) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00235
Epicentral distance of station farthest from the epicenter (degree) 0.00939
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 7959
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:12:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CH1.Z. 1985-06-04T16:13:58.50 10.0 undecidable manual PG 332 0.0094 1.17 0.7
--.AR1.Z. 1985-06-04T16:13:52.00 10.0 undecidable manual PG 16 0.0075 -1.36 0.6
--.AS1.Z. 1985-06-04T16:13:51.00 10.0 undecidable manual SG 4 0.0032 0.34 0.8
--.MNS.Z. 1985-06-04T16:13:50.10 10.0 undecidable manual SG 171 0.0028 1.22 0.4
--.PO9.Z. 1985-06-04T16:13:48.50 10.0 undecidable manual SG 117 0.0023 1.35 0.3
--.AS1.Z. 1985-06-04T16:13:45.00 10.0 undecidable manual PG 4 0.0032 0.34 2
--.MNS.Z. 1985-06-04T16:13:42.50 10.0 undecidable manual PG 171 0.0028 -1.14 1.1
--.PO9.Z. 1985-06-04T16:13:42.50 10.0 undecidable manual PG 117 0.0023 -0.14 2.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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