Earthquake with magnitude of Md 2.9 on date 11-07-1986 and time 08:57:46 (Italy) in region 3 km E Cascia (PG)

A magnitude Md 2.9 earthquake occured in region: 3 km E Cascia (PG), on

  • 11-07-1986 06:57:46 (UTC)
  • 11-07-1986 08:57:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.71, 13.05 at 5 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 3 3217 3217
Poggiodomo PG 9 117 3334
Norcia PG 10 4957 8291
Monteleone di Spoleto PG 11 599 8890
Cittareale RI 14 482 9372
Cerreto di Spoleto PG 16 1075 10447
Accumoli RI 16 667 11114
Vallo di Nera PG 17 364 11478
Sant'Anatolia di Narco PG 18 564 12042
Scheggino PG 18 461 12503
Leonessa RI 18 2435 14938
Preci PG 18 724 15662

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Terni (111501 inhabitants)
39 Km SE of Foligno (57155 inhabitants)
49 Km NW of L'Aquila (69753 inhabitants)
54 Km W of Teramo (54892 inhabitants)
69 Km SE of Perugia (166134 inhabitants)
84 Km NE of Guidonia Montecelio (88673 inhabitants)
84 Km E of Viterbo (67173 inhabitants)
86 Km N of Tivoli (56533 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
99 Km W of Pescara (121014 inhabitants)
100 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 2.9 1986-07-11
06:57:46
42.71 13.05 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 30839
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-07-11 06:57:46 ± 0.209
Latitude 42.71 ± 0.01
Longitude 13.05 ± 0.02
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 30839

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) 2312.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 146
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
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) 0.0038
Epicentral distance of station farthest from the epicenter (degree) 0.03489
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:2.9

Field Value
Value 2.9
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 30839
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:31:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.FO1.Z. 1986-07-11T06:58:47.00 10.0 undecidable manual PN 356 0.0349 0.69 0.5
--.CTI.Z. 1986-07-11T06:58:41.30 10.0 undecidable manual PN 343 0.0312 0.54 0.7
--.BDI.Z. 1986-07-11T06:58:24.00 10.0 undecidable manual PN 307 0.0201 0.32 1.2
--.MAO.Z. 1986-07-11T06:58:13.00 10.0 undecidable manual PN 258 0.0128 0.39 1.4
--.ARV.Z. 1986-07-11T06:58:13.00 10.0 undecidable manual SG 354 0.007 -1.35 0.1
--.AQU.Z. 1986-07-11T06:58:03.00 10.0 undecidable manual SG 143 0.004 -0.28 1
--.ARV.Z. 1986-07-11T06:58:02.00 10.0 undecidable manual PG 354 0.007 -0.44 1.3
--.MNS.Z. 1986-07-11T06:58:02.00 10.0 undecidable manual SG 219 0.0038 -0.72 0.3
--.AQU.Z. 1986-07-11T06:57:56.00 10.0 undecidable manual PG 143 0.004 -0.05 1.8
--.MNS.Z. 1986-07-11T06:57:55.50 10.0 undecidable manual PG 219 0.0038 -0.23 1.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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