Earthquake with magnitude of Md 2.1 on date 28-09-1997 and time 23:32:03 (Italy) in region 4 km E Foligno (PG)

A magnitude Md 2.1 earthquake occured in region: 4 km E Foligno (PG), on

  • 28-09-1997 21:32:03 (UTC)
  • 28-09-1997 23:32:03 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.966, 12.758 at 26 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
Foligno PG 5 57155 57155
Spello PG 8 8645 65800
Trevi PG 10 8469 74269
Valtopina PG 11 1398 75667
Montefalco PG 12 5679 81346
Bevagna PG 13 5081 86427
Cannara PG 15 4305 90732
Sellano PG 16 1079 91811
Campello sul Clitunno PG 16 2442 94253
Nocera Umbra PG 16 5839 100092
Assisi PG 17 28299 128391
Castel Ritaldi PG 17 3278 131669
Gualdo Cattaneo PG 18 6155 137824
Serravalle di Chienti MC 20 1070 138894

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km E of Foligno (57155 inhabitants)
34 Km E of Perugia (166134 inhabitants)
46 Km N of Terni (111501 inhabitants)
81 Km NE of Viterbo (67173 inhabitants)
84 Km W of Teramo (54892 inhabitants)
86 Km NW of L'Aquila (69753 inhabitants)
90 Km SE of Arezzo (99543 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
100 Km S of Fano (60888 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 2.1
ML-VAX 1.6
1997-09-28
21:32:03
42.966 12.758 26 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 283789
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-09-28 21:32:03 ± 0.176
Latitude 42.9660 ± 0.0093
Longitude 12.7580 ± 0.0545
Depth (km) 26 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 283789

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) 4554.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 171
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00105
Epicentral distance of station farthest from the epicenter (degree) 0.00882
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 283789
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:27:39

ML:1.6

Field Value
Value 1.6
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 283789
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.FB9.Z. 1997-09-28T21:32:28.80 10.0 undecidable manual SN 1 0.0065 0.35 0.3
--.MNS.Z. 1997-09-28T21:32:24.59 10.0 undecidable manual SN 185 0.0052 0.24 0.6
--.ARV.Z. 1997-09-28T21:32:24.15 10.0 undecidable manual SG 14 0.0049 0.76 0
--.RSM.Z. 1997-09-28T21:32:20.91 10.0 undecidable manual PN 347 0.0088 0.01 1.5
--.FB9.Z. 1997-09-28T21:32:17.20 10.0 undecidable manual PN 1 0.0065 -0.28 1.1
--.MNS.Z. 1997-09-28T21:32:15.37 10.0 undecidable manual PN 185 0.0052 0.01 2
--.ARV.Z. 1997-09-28T21:32:14.42 10.0 undecidable manual PG 14 0.0049 -0.38 0.9
--.ASS.Z. 1997-09-28T21:32:12.60 10.0 undecidable manual SG 321 0.0011 -0.13 0.7
--.ASS.Z. 1997-09-28T21:32:08.49 10.0 undecidable manual PG 321 0.0011 0.15 1.8
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