Earthquake with magnitude of Md 2.4 on date 23-08-1985 and time 00:46:17 (UTC) in region 7 km SE Cascia (PG)

A magnitude Md 2.4 earthquake occured in region: 7 km SE Cascia (PG), on

  • 23-08-1985 00:46:17 (UTC)
  • 23-08-1985 02:46:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.68, 13.08 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
Cascia PG 7 3217 3217
Cittareale RI 10 482 3699
Monteleone di Spoleto PG 11 599 4298
Poggiodomo PG 12 117 4415
Norcia PG 12 4957 9372
Accumoli RI 14 667 10039
Leonessa RI 16 2435 12474
Posta RI 18 694 13168
Amatrice RI 18 2657 15825
Borbona RI 20 617 16442

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Terni (111501 inhabitants)
43 Km SE of Foligno (57155 inhabitants)
45 Km NW of L'Aquila (69753 inhabitants)
51 Km W of Teramo (54892 inhabitants)
73 Km SE of Perugia (166134 inhabitants)
81 Km NE of Guidonia Montecelio (88673 inhabitants)
83 Km N of Tivoli (56533 inhabitants)
85 Km E of Viterbo (67173 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
96 Km W of Pescara (121014 inhabitants)
97 Km W of Chieti (51815 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 1985-08-23
00:46:17
42.68 13.08 6 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 12239
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-08-23 00:46:17 ± 0.129
Latitude 42.68 ± 0.01
Longitude 13.08 ± 0.01
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 12239

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) 1366.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.0013
Epicentral distance of station farthest from the epicenter (degree) 0.00996
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 12239
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:15:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SD1.Z. 1985-08-23T00:46:39.00 10.0 undecidable manual PN 150 0.01 0 1.4
--.CM2.Z. 1985-08-23T00:46:35.90 10.0 undecidable manual SG 5 0.0045 -0.16 1.2
--.ALP.Z. 1985-08-23T00:46:32.00 10.0 undecidable manual SG 74 0.0033 0.44 0.5
--.CM2.Z. 1985-08-23T00:46:28.50 10.0 undecidable manual PG? 5 0.0045 0.46 0.3
--.ALP.Z. 1985-08-23T00:46:25.00 10.0 undecidable manual PG 74 0.0033 -0.44 0.8
--.PO9.Z. 1985-08-23T00:46:23.00 10.0 undecidable manual SG 222 0.0013 -0.22 0.7
--.PO9.Z. 1985-08-23T00:46:20.80 10.0 undecidable manual PG 222 0.0013 0.18 2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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