Earthquake with magnitude of Md 2.6 on date 04-03-1985 and time 16:07:41 (UTC) in region 3 km S Poggiodomo (PG)

A magnitude Md 2.6 earthquake occured in region: 3 km S Poggiodomo (PG), on

  • 04-03-1985 16:07:41 (UTC)
  • 04-03-1985 17:07:41 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.68, 12.94 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
Poggiodomo PG 3 117 117
Monteleone di Spoleto PG 4 599 716
Cascia PG 7 3217 3933
Scheggino PG 10 461 4394
Sant'Anatolia di Narco PG 10 564 4958
Vallo di Nera PG 12 364 5322
Polino TR 13 233 5555
Leonessa RI 13 2435 7990
Ferentillo TR 14 1913 9903
Cerreto di Spoleto PG 16 1075 10978
Montefranco TR 17 1276 12254
Spoleto PG 17 38218 50472
Norcia PG 18 4957 55429
Arrone TR 18 2763 58192
Morro Reatino RI 19 373 58565
Cittareale RI 19 482 59047
Rivodutri RI 20 1253 60300

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km E of Terni (111501 inhabitants)
36 Km SE of Foligno (57155 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
63 Km W of Teramo (54892 inhabitants)
65 Km SE of Perugia (166134 inhabitants)
74 Km E of Viterbo (67173 inhabitants)
78 Km N of Guidonia Montecelio (88673 inhabitants)
81 Km N of Tivoli (56533 inhabitants)
95 Km NE of Roma (2864731 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 2.6 1985-03-04
16:07:41
42.68 12.94 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 3019
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-03-04 16:07:41 ± 0.281
Latitude 42.68 ± 0.01
Longitude 12.94 ± 0.04
Depth (km) 10 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 3019

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) 3297.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 133
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
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) 0.00089
Epicentral distance of station farthest from the epicenter (degree) 0.01044
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

Md:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 6
Type of magnitude Md
Reference to an origin 3019
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:07:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SD1.Z. 1985-03-04T16:08:20.00 10.0 undecidable manual SN 146 0.0104 0.64 0.2
--.AR1.Z. 1985-03-04T16:08:09.00 10.0 undecidable manual SG 0 0.0073 -0.23 0.5
--.SD1.Z. 1985-03-04T16:08:03.00 10.0 undecidable manual PN 146 0.0104 -0.19 0.9
--.AS1.Z. 1985-03-04T16:07:58.00 10.0 undecidable manual SG 331 0.0039 1.01 0.3
--.AQU.Z. 1985-03-04T16:07:57.00 10.0 undecidable manual SG 133 0.0042 -1.21 0.1
--.AR1.Z. 1985-03-04T16:07:56.00 10.0 undecidable manual PG 0 0.0073 -1.35 0.1
--.MNS.Z. 1985-03-04T16:07:54.00 10.0 undecidable manual SG 212 0.0032 -0.38 0.7
--.AQU.Z. 1985-03-04T16:07:52.00 10.0 undecidable manual PG 133 0.0042 1.01 0.4
--.AS1.Z. 1985-03-04T16:07:50.50 10.0 undecidable manual PG 331 0.0039 0.22 2.8
--.MNS.Z. 1985-03-04T16:07:48.50 10.0 undecidable manual PG 212 0.0032 -0.27 2.7
--.PO9.Z. 1985-03-04T16:07:46.20 10.0 undecidable manual SG 179 0.0009 -0.29 0.5
--.PO9.Z. 1985-03-04T16:07:44.50 10.0 negative manual PG 179 0.0009 0.29 2.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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