Earthquake with magnitude of Md 2.3 on date 01-05-1985 and time 00:47:37 (Italy) in region 5 km SE Assisi (PG)

A magnitude Md 2.3 earthquake occured in region: 5 km SE Assisi (PG), on

  • 30-04-1985 22:47:37 (UTC)
  • 01-05-1985 00:47:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.04, 12.65 at 6 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
Assisi PG 5 28299 28299
Spello PG 6 8645 36944
Cannara PG 8 4305 41249
Valtopina PG 9 1398 42647
Bastia Umbra PG 9 21874 64521
Foligno PG 10 57155 121676
Bevagna PG 12 5081 126757
Nocera Umbra PG 14 5839 132596
Valfabbrica PG 14 3389 135985
Bettona PG 14 4367 140352
Montefalco PG 16 5679 146031
Gualdo Cattaneo PG 17 6155 152186
Torgiano PG 18 6725 158911
Trevi PG 20 8469 167380

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km NW of Foligno (57155 inhabitants)
23 Km E of Perugia (166134 inhabitants)
53 Km N of Terni (111501 inhabitants)
78 Km SE of Arezzo (99543 inhabitants)
83 Km NE of Viterbo (67173 inhabitants)
94 Km SW of Fano (60888 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
96 Km W of Teramo (54892 inhabitants)
98 Km NW of L'Aquila (69753 inhabitants)
99 Km S of Pesaro (94582 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 2.3 1985-04-30
22:47:37
43.04 12.65 6 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 5709
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-30 22:47:37 ± 0.354
Latitude 43.04 ± 0.03
Longitude 12.65 ± 0.05
Depth (km) 6 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 5709

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) 5019.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 140
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) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00016
Epicentral distance of station farthest from the epicenter (degree) 0.00696
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:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 5709
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:10:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MNS.Z. 1985-04-30T22:48:03.00 10.0 undecidable manual SG 178 0.0059 1.57 0
--.CH1.Z. 1985-04-30T22:47:54.00 10.0 undecidable manual PG? 318 0.007 0.34 0.4
--.CM2.Z. 1985-04-30T22:47:53.40 10.0 undecidable manual SG 66 0.0035 0.65 0.6
--.MNS.Z. 1985-04-30T22:47:50.50 10.0 undecidable manual PG 178 0.0059 -0.91 0.4
--.PO9.Z. 1985-04-30T22:47:48.80 10.0 undecidable manual PG 155 0.0046 0.05 1.5
--.CM2.Z. 1985-04-30T22:47:45.80 10.0 undecidable manual PG 66 0.0035 -0.61 1
--.AS1.Z. 1985-04-30T22:47:40.00 10.0 undecidable manual SG 357 0.0002 -0.11 1
--.AS1.Z. 1985-04-30T22:47:39.30 10.0 positive manual PG 357 0.0002 0.19 3.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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