Earthquake with magnitude of Md 4.1 on date 04-10-1997 and time 08:49:57 (Italy) in region 3 km N Sellano (PG)

A magnitude Md 4.1 earthquake occured in region: 3 km N Sellano (PG), on

  • 04-10-1997 06:49:57 (UTC)
  • 04-10-1997 08:49:57 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.91, 12.94 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
Sellano PG 3 1079 1079
Preci PG 9 724 1803
Monte Cavallo MC 11 145 1948
Cerreto di Spoleto PG 11 1075 3023
Visso MC 13 1107 4130
Trevi PG 16 8469 12599
Campello sul Clitunno PG 17 2442 15041
Ussita MC 17 444 15485
Vallo di Nera PG 17 364 15849
Pieve Torina MC 17 1458 17307
Serravalle di Chienti MC 18 1070 18377
Castelsantangelo sul Nera MC 18 281 18658
Norcia PG 19 4957 23615
Fiordimonte MC 19 202 23817
Foligno PG 19 57155 80972

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km E of Foligno (57155 inhabitants)
46 Km NE of Terni (111501 inhabitants)
49 Km E of Perugia (166134 inhabitants)
69 Km W of Teramo (54892 inhabitants)
73 Km NW of L'Aquila (69753 inhabitants)
87 Km NE of Viterbo (67173 inhabitants)
92 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 4.1 1997-10-04
06:49:57
42.91 12.94 5 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 288949
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-10-04 06:49:57 ± 0.321
Latitude 42.91 ± 0.01
Longitude 12.94 ± 0.02
Depth (km) 5 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 288949

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) 1724.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 147
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
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) 0.00227
Epicentral distance of station farthest from the epicenter (degree) 0.01222
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

Md:4.1

Field Value
Value 4.1
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 288949
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:32:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SDI.Z. 1997-10-04T06:50:24.37 10.0 undecidable manual PN 151 0.0122 0.79 0.1
--.AQU.Z. 1997-10-04T06:50:21.77 10.0 undecidable manual SG 148 0.0059 -0.16 0.5
--.RDP.Z. 1997-10-04T06:50:20.54 10.0 undecidable manual PN 187 0.0104 -0.29 0.9
--.RSM.Z. 1997-10-04T06:50:20.13 10.0 undecidable manual PG 340 0.0096 0.6 0.4
--.RMP.Z. 1997-10-04T06:50:19.72 10.0 undecidable manual PN 188 0.01 -0.42 0.7
--.MNS.Z. 1997-10-04T06:50:19.00 10.0 undecidable manual SG 199 0.005 0.13 0.6
--.ARV.Z. 1997-10-04T06:50:19.70 10.0 undecidable manual SG 0 0.0052 0.08 0.6
--.CRE.Z. 1997-10-04T06:50:18.00 10.0 undecidable manual PG 314 0.009 -0.27 1
--.PQ9.Z. 1997-10-04T06:50:16.71 10.0 undecidable manual PG 158 0.0086 -0.63 0.4
--.AQU.Z. 1997-10-04T06:50:11.91 10.0 positive manual PG 148 0.0059 0.1 2.8
--.MNS.Z. 1997-10-04T06:50:10.19 10.0 positive manual PG 199 0.005 0.15 2.7
--.ARV.Z. 1997-10-04T06:50:10.22 10.0 positive manual PG 0 0.0052 -0.25 2.4
--.ASS.Z. 1997-10-04T06:50:07.39 10.0 undecidable manual SG 305 0.0023 -0.55 0.2
--.ASS.Z. 1997-10-04T06:50:04.20 10.0 undecidable manual PG 305 0.0023 0.47 0.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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