Earthquake with magnitude of Md 2.5 on date 15-08-1985 and time 23:41:12 (Italy) in region 5 km NE Cascia (PG)

A magnitude Md 2.5 earthquake occured in region: 5 km NE Cascia (PG), on

  • 15-08-1985 21:41:12 (UTC)
  • 15-08-1985 23:41:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.75, 13.05 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
Cascia PG 5 3217 3217
Norcia PG 6 4957 8174
Poggiodomo PG 10 117 8291
Cerreto di Spoleto PG 13 1075 9366
Monteleone di Spoleto PG 14 599 9965
Preci PG 14 724 10689
Vallo di Nera PG 16 364 11053
Cittareale RI 17 482 11535
Accumoli RI 17 667 12202
Sant'Anatolia di Narco PG 18 564 12766
Castelsantangelo sul Nera MC 18 281 13047
Scheggino PG 18 461 13508
Sellano PG 19 1079 14587

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SE of Foligno (57155 inhabitants)
39 Km NE of Terni (111501 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
54 Km W of Teramo (54892 inhabitants)
67 Km SE of Perugia (166134 inhabitants)
86 Km E of Viterbo (67173 inhabitants)
88 Km NE of Guidonia Montecelio (88673 inhabitants)
90 Km N of Tivoli (56533 inhabitants)
94 Km W of Montesilvano (53738 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 2.5 1985-08-15
21:41:12
42.75 13.05 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 11829
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-08-15 21:41:12 ± 0.168
Latitude 42.75 ± 0.01
Longitude 13.05 ± 0.01
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 11829

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) 1765.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.0017
Epicentral distance of station farthest from the epicenter (degree) 0.00405
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:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 11829
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:15:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CM2.Z. 1985-08-15T21:41:30.10 10.0 undecidable manual SG 8 0.004 0.95 0.1
--.MNS.Z. 1985-08-15T21:41:30.00 10.0 undecidable manual SG 216 0.004 0.48 0.3
--.ALP.Z. 1985-08-15T21:41:27.10 10.0 undecidable manual SG 85 0.0034 0.08 0.9
--.MNS.Z. 1985-08-15T21:41:22.00 10.0 undecidable manual PG 216 0.004 -0.5 0.7
--.AS1.Z. 1985-08-15T21:41:22.00 10.0 undecidable manual PG 316 0.0038 0.05 1.5
--.ALP.Z. 1985-08-15T21:41:21.00 10.0 undecidable manual PG 85 0.0034 -0.06 1.5
--.CM2.Z. 1985-08-15T21:41:21.90 10.0 undecidable manual PG 8 0.004 -0.4 1.9
--.PO9.Z. 1985-08-15T21:41:18.00 10.0 undecidable manual PG 204 0.0017 0.36 1.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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