Earthquake with magnitude of Md 2.4 on date 02-04-1985 and time 11:32:56 (Italy) in region 4 km NW Giano dell'Umbria (PG)

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

  • 02-04-1985 09:32:56 (UTC)
  • 02-04-1985 11:32:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.86, 12.56 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
Gualdo Cattaneo PG 5 6155 10001
Montefalco PG 8 5679 15680
Bevagna PG 9 5081 20761
Massa Martana PG 10 3770 24531
Castel Ritaldi PG 10 3278 27809
Collazzone PG 10 3473 31282
Cannara PG 15 4305 35587
Todi PG 15 16851 52438
Trevi PG 16 8469 60907
Fratta Todina PG 16 1839 62746
Foligno PG 16 57155 119901
Monte Castello di Vibio PG 17 1567 121468
Spello PG 17 8645 130113
Deruta PG 17 9669 139782
Bettona PG 18 4367 144149
Campello sul Clitunno PG 19 2442 146591
Marsciano PG 19 18902 165493
Acquasparta TR 19 4778 170271

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km SW of Foligno (57155 inhabitants)
30 Km SE of Perugia (166134 inhabitants)
34 Km N of Terni (111501 inhabitants)
62 Km NE of Viterbo (67173 inhabitants)
87 Km SE of Arezzo (99543 inhabitants)
89 Km NW of L'Aquila (69753 inhabitants)
96 Km W of Teramo (54892 inhabitants)
97 Km N of Guidonia Montecelio (88673 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 2.4 1985-04-02
09:32:56
42.86 12.56 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 3919
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-02 09:32:56 ± 0.989
Latitude 42.86 ± 0.02
Longitude 12.56 ± 0.10
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 3919

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) 8856.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 243
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) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00186
Epicentral distance of station farthest from the epicenter (degree) 0.00615
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:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 3919
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:08:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AR1.Z. 1985-04-02T09:33:21.00 10.0 undecidable manual SG 23 0.0062 0.13 0.7
--.AR1.Z. 1985-04-02T09:33:12.00 10.0 undecidable manual PG 23 0.0062 1.33 0.5
--.PO9.Z. 1985-04-02T09:33:12.00 10.0 undecidable manual SG 135 0.0036 0.4 0.8
--.PO9.Z. 1985-04-02T09:33:05.00 10.0 undecidable manual PG 135 0.0036 -0.31 1.9
--.AS1.Z. 1985-04-02T09:33:04.50 10.0 undecidable manual SG 18 0.0019 -0.86 0.3
--.AS1.Z. 1985-04-02T09:33:01.50 10.0 undecidable manual PG 18 0.0019 -0.21 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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