Earthquake with magnitude of Md 2.4 on date 30-09-1997 and time 23:41:03 (UTC) in region 6 km N Nocera Umbra (PG)

A magnitude Md 2.4 earthquake occured in region: 6 km N Nocera Umbra (PG), on

  • 30-09-1997 23:41:03 (UTC)
  • 01-10-1997 01:41:03 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.17, 12.797 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
Nocera Umbra PG 7 5839 5839
Gualdo Tadino PG 7 15208 21047
Fiuminata MC 11 1402 22449
Valtopina PG 13 1398 23847
Sefro MC 13 422 24269
Fossato di Vico PG 14 2840 27109
Esanatoglia MC 15 2034 29143
Pioraco MC 15 1134 30277
Valfabbrica PG 16 3389 33666
Serravalle di Chienti MC 17 1070 34736
Assisi PG 18 28299 63035
Sigillo PG 19 2404 65439
Matelica MC 20 9981 75420

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km NE of Foligno (57155 inhabitants)
34 Km E of Perugia (166134 inhabitants)
69 Km N of Terni (111501 inhabitants)
77 Km SW of Ancona (100861 inhabitants)
77 Km S of Fano (60888 inhabitants)
81 Km E of Arezzo (99543 inhabitants)
83 Km S of Pesaro (94582 inhabitants)
93 Km NW of Teramo (54892 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
Bulletin
Rev1000
Md 2.4 1997-09-30
23:41:03
43.17 12.797 4 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 285939
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-09-30 23:41:03 ± 0.249
Latitude 43.1700 ± 0.0116
Longitude 12.7970 ± 0.0347
Depth (km) 4 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 285939

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) 3099.6
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 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) 0.0013
Epicentral distance of station farthest from the epicenter (degree) 0.01473
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:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 285939
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:29:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SDI.Z. 1997-09-30T23:41:33.00 10.0 undecidable manual PN 152 0.0147 0.37 0.9
--.MNS.Z. 1997-09-30T23:41:30.50 10.0 undecidable manual SG 186 0.007 -1.02 0.1
--.FB9.Z. 1997-09-30T23:41:23.67 10.0 undecidable manual SG 358 0.0047 0.73 0.3
--.AQU.Z. 1997-09-30T23:41:22.00 10.0 undecidable manual PG 151 0.0083 -0.1 1.8
--.MNS.Z. 1997-09-30T23:41:20.00 10.0 undecidable manual PG 186 0.007 0.48 1.3
--.ARV.Z. 1997-09-30T23:41:17.41 10.0 undecidable manual SG 17 0.0031 0.88 0.2
--.FB9.Z. 1997-09-30T23:41:13.97 10.0 undecidable manual PG 358 0.0047 -0.61 1.1
--.ARV.Z. 1997-09-30T23:41:10.40 10.0 undecidable manual PG 17 0.0031 -0.48 1.4
--.ASS.Z. 1997-09-30T23:41:09.50 10.0 undecidable manual SG 224 0.0013 0.38 0.7
--.ASS.Z. 1997-09-30T23:41:06.50 10.0 undecidable manual PG 224 0.0013 -0.09 2.2
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download