Earthquake with magnitude of Md 2.9 on date 05-02-1985 and time 03:51:08 (Italy) in region 5 km E Cerreto di Spoleto (PG)

A magnitude Md 2.9 earthquake occured in region: 5 km E Cerreto di Spoleto (PG), on

  • 05-02-1985 02:51:08 (UTC)
  • 05-02-1985 03:51:08 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.83, 12.98 at 4 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
Cerreto di Spoleto PG 5 1075 1075
Preci PG 8 724 1799
Sellano PG 8 1079 2878
Norcia PG 10 4957 7835
Vallo di Nera PG 11 364 8199
Cascia PG 12 3217 11416
Poggiodomo PG 13 117 11533
Visso MC 15 1107 12640
Sant'Anatolia di Narco PG 16 564 13204
Castelsantangelo sul Nera MC 16 281 13485
Campello sul Clitunno PG 17 2442 15927
Scheggino PG 17 461 16388
Ussita MC 19 444 16832
Monte Cavallo MC 19 145 16977
Monteleone di Spoleto PG 20 599 17576
Trevi PG 20 8469 26045

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SE of Foligno (57155 inhabitants)
40 Km NE of Terni (111501 inhabitants)
57 Km SE of Perugia (166134 inhabitants)
62 Km W of Teramo (54892 inhabitants)
63 Km NW of L'Aquila (69753 inhabitants)
85 Km NE of Viterbo (67173 inhabitants)
94 Km N of Guidonia Montecelio (88673 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
98 Km SW of Ancona (100861 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
M 2.6
1985-02-05
02:51:08
42.83 12.98 4 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 1109
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-05 02:51:08 ± 0.174
Latitude 42.83 ± 0.01
Longitude 12.98 ± 0.02
Depth (km) 4 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 1109

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) 1532.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 128
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00227
Epicentral distance of station farthest from the epicenter (degree) 0.03019
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

Md:2.9

Field Value
Value 2.9
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 1109
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:06:17

M:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 1109
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:50:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CTI.Z. 1985-02-05T02:52:01.50 10.0 undecidable manual PN 344 0.0302 -0.45 0.4
--.SD1.Z. 1985-02-05T02:51:34.00 10.0 undecidable manual PN 150 0.0114 0.64 1.2
--.AR1.Z. 1985-02-05T02:51:33.20 10.0 undecidable manual SG 357 0.006 -0.32 0.5
--.AQU.Z. 1985-02-05T02:51:30.50 10.0 undecidable manual SG 146 0.005 0.43 0.5
--.CH1.Z. 1985-02-05T02:51:30.50 10.0 undecidable manual PN 317 0.0099 -0.46 0.8
--.PRG.Z. 1985-02-05T02:51:29.00 10.0 undecidable manual SG 302 0.0045 0.75 0.5
--.MNS.Z. 1985-02-05T02:51:27.20 10.0 undecidable manual SG 206 0.0044 -0.58 0.5
--.CM8.Z. 1985-02-05T02:51:24.00 10.0 undecidable manual SG 17 0.0035 0.18 0.6
--.AR1.Z. 1985-02-05T02:51:22.50 10.0 undecidable manual PG 357 0.006 -0.6 0.8
--.AS1.Z. 1985-02-05T02:51:21.50 10.0 undecidable manual SG 314 0.003 -0.41 0.7
--.PRG.Z. 1985-02-05T02:51:21.00 10.0 undecidable manual PG 302 0.0045 0.95 0.9
--.AQU.Z. 1985-02-05T02:51:21.00 10.0 undecidable manual PG 146 0.005 -0.1 1.5
--.MNS.Z. 1985-02-05T02:51:19.00 10.0 positive manual PG 206 0.0044 -0.79 1.2
--.PO9.Z. 1985-02-05T02:51:18.00 10.0 undecidable manual SG 186 0.0023 -0.72 0.5
--.CM8.Z. 1985-02-05T02:51:17.20 10.0 undecidable manual PG 17 0.0035 -0.3 1.3
--.AS1.Z. 1985-02-05T02:51:16.50 10.0 negative manual PG 314 0.003 0.11 3
--.PO9.Z. 1985-02-05T02:51:15.00 10.0 positive manual PG 186 0.0023 0.45 2.2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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