Earthquake with magnitude of Md 2.4 on date 09-07-1985 and time 21:31:29 (Italy) in region 4 km E Giano dell'Umbria (PG)

A magnitude Md 2.4 earthquake occured in region: 4 km E Giano dell'Umbria (PG), on

  • 09-07-1985 19:31:29 (UTC)
  • 09-07-1985 21:31:29 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.84, 12.63 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
Giano dell'Umbria PG 4 3846 3846
Castel Ritaldi PG 4 3278 7124
Montefalco PG 7 5679 12803
Gualdo Cattaneo PG 10 6155 18958
Trevi PG 11 8469 27427
Bevagna PG 11 5081 32508
Massa Martana PG 11 3770 36278
Campello sul Clitunno PG 13 2442 38720
Foligno PG 15 57155 95875
Spoleto PG 15 38218 134093
Collazzone PG 17 3473 137566
Acquasparta TR 18 4778 142344
Spello PG 18 8645 150989
Cannara PG 18 4305 155294
Todi PG 19 16851 172145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km SW of Foligno (57155 inhabitants)
31 Km N of Terni (111501 inhabitants)
36 Km SE of Perugia (166134 inhabitants)
63 Km NE of Viterbo (67173 inhabitants)
83 Km NW of L'Aquila (69753 inhabitants)
90 Km W of Teramo (54892 inhabitants)
92 Km SE of Arezzo (99543 inhabitants)
94 Km N of Guidonia Montecelio (88673 inhabitants)
98 Km N of Tivoli (56533 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
Bulletin
Rev1000
Md 2.4 1985-07-09
19:31:29
42.84 12.63 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 9919
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-07-09 19:31:29 ± 0.327
Latitude 42.84 ± 0.01
Longitude 12.63 ± 0.04
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 9919

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) 3184.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 153
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
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) 0.00194
Epicentral distance of station farthest from the epicenter (degree) 0.00899
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 9919
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:13:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AM1.Z. 1985-07-09T19:32:04.60 10.0 undecidable manual SG 44 0.009 0.72 0.5
--.AM1.Z. 1985-07-09T19:31:51.00 10.0 undecidable manual PG 44 0.009 1.56 0.2
--.CH1.Z. 1985-07-09T19:31:49.00 10.0 undecidable manual PG 328 0.0083 0.95 0.6
--.CM2.Z. 1985-07-09T19:31:48.30 10.0 undecidable manual SG 46 0.0046 0.11 1
--.AR1.Z. 1985-07-09T19:31:42.50 10.0 undecidable manual PG 19 0.0062 -1.24 0.4
--.PO9.Z. 1985-07-09T19:31:42.50 10.0 undecidable manual SG 138 0.0032 -0.38 0.6
--.MNS.Z. 1985-07-09T19:31:39.50 10.0 undecidable manual PG 174 0.004 0.26 1.5
--.CM2.Z. 1985-07-09T19:31:39.90 10.0 undecidable manual PG 46 0.0046 -0.47 1.3
--.AS1.Z. 1985-07-09T19:31:38.50 10.0 undecidable manual SG 4 0.0019 -0.3 0.9
--.PO9.Z. 1985-07-09T19:31:37.00 10.0 undecidable manual PG 138 0.0032 -0.31 1.5
--.AS1.Z. 1985-07-09T19:31:34.50 10.0 positive manual PG 4 0.0019 -0.45 2.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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