Earthquake with magnitude of Md 2.7 on date 05-02-1985 and time 08:11:10 (Italy) in region 5 km SW Norcia (PG)

A magnitude Md 2.7 earthquake occured in region: 5 km SW Norcia (PG), on

  • 05-02-1985 07:11:10 (UTC)
  • 05-02-1985 08:11:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.76, 13.06 at 8 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
Norcia PG 5 4957 4957
Cascia PG 6 3217 8174
Poggiodomo PG 11 117 8291
Cerreto di Spoleto PG 13 1075 9366
Preci PG 13 724 10090
Monteleone di Spoleto PG 15 599 10689
Vallo di Nera PG 16 364 11053
Castelsantangelo sul Nera MC 17 281 11334
Accumoli RI 17 667 12001
Sellano PG 18 1079 13080
Cittareale RI 18 482 13562
Sant'Anatolia di Narco PG 18 564 14126
Visso MC 19 1107 15233
Scheggino PG 19 461 15694
Arquata del Tronto AP 20 1178 16872

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SE of Foligno (57155 inhabitants)
40 Km NE of Terni (111501 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
54 Km W of Teramo (54892 inhabitants)
67 Km SE of Perugia (166134 inhabitants)
87 Km E of Viterbo (67173 inhabitants)
89 Km NE of Guidonia Montecelio (88673 inhabitants)
91 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 2.7 1985-02-05
07:11:10
42.76 13.06 8 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 1139
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-05 07:11:10 ± 0.196
Latitude 42.76 ± 0.01
Longitude 13.06 ± 0.02
Depth (km) 8 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 1139

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) 2053.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 139
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
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) 0.00178
Epicentral distance of station farthest from the epicenter (degree) 0.01069
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

Md:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 1139
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:06:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CH1.Z. 1985-02-05T07:11:50.00 10.0 undecidable manual SN 317 0.0106 0.21 0.4
--.CH1.Z. 1985-02-05T07:11:33.50 10.0 undecidable manual PN 317 0.0106 0.27 1
--.SD1.Z. 1985-02-05T07:11:32.50 10.0 undecidable manual PN 151 0.0107 -0.84 0.2
--.MNS.Z. 1985-02-05T07:11:28.50 10.0 undecidable manual SG 216 0.0041 0.58 0.2
--.CM8.Z. 1985-02-05T07:11:27.10 10.0 undecidable manual SG 8 0.0039 0.14 0.7
--.AR1.Z. 1985-02-05T07:11:26.00 10.0 undecidable manual PG 353 0.0066 0.33 1.2
--.AS1.Z. 1985-02-05T07:11:26.50 10.0 undecidable manual SG 315 0.0037 0.06 0.7
--.AQU.Z. 1985-02-05T07:11:21.50 10.0 undecidable manual PG 147 0.0043 0.64 0.4
--.MNS.Z. 1985-02-05T07:11:20.00 10.0 undecidable manual PG 216 0.0041 -0.6 0.7
--.AS1.Z. 1985-02-05T07:11:19.50 10.0 undecidable manual PG 315 0.0037 -0.25 1.5
--.CM8.Z. 1985-02-05T07:11:19.70 10.0 undecidable manual PG 8 0.0039 -0.35 1.3
--.PO9.Z. 1985-02-05T07:11:19.00 10.0 undecidable manual SG 203 0.0018 0.02 1.1
--.PO9.Z. 1985-02-05T07:11:15.50 10.0 positive manual PG 203 0.0018 0.05 3.6
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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