Earthquake with magnitude of Md 2.5 on date 14-09-1997 and time 17:39:58 (Italy) in region 3 km W Nocera Umbra (PG)

A magnitude Md 2.5 earthquake occured in region: 3 km W Nocera Umbra (PG), on

  • 14-09-1997 15:39:58 (UTC)
  • 14-09-1997 17:39:58 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.11, 12.75 at 10 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 3 5839 5839
Valtopina PG 6 1398 7237
Assisi PG 12 28299 35536
Valfabbrica PG 13 3389 38925
Gualdo Tadino PG 13 15208 54133
Spello PG 15 8645 62778
Sefro MC 16 422 63200
Serravalle di Chienti MC 17 1070 64270
Fiuminata MC 17 1402 65672
Bastia Umbra PG 17 21874 87546
Foligno PG 18 57155 144701
Cannara PG 19 4305 149006

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km N of Foligno (57155 inhabitants)
30 Km E of Perugia (166134 inhabitants)
62 Km N of Terni (111501 inhabitants)
81 Km E of Arezzo (99543 inhabitants)
84 Km SW of Ancona (100861 inhabitants)
84 Km S of Fano (60888 inhabitants)
90 Km S of Pesaro (94582 inhabitants)
93 Km NW of Teramo (54892 inhabitants)
94 Km NE of Viterbo (67173 inhabitants)
100 Km NW of L'Aquila (69753 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 2.5
ML-VAX 2.1
1997-09-14
15:39:58
43.11 12.75 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 277859
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-09-14 15:39:58 ± 0.283
Latitude 43.11 ± 0.02
Longitude 12.75 ± 0.04
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 277859

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) 3648.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 144
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) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00081
Epicentral distance of station farthest from the epicenter (degree) 0.01441
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 277859
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:22:29

ML:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 277859
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
--.SDI.Z. 1997-09-14T15:40:48.67 10.0 undecidable manual SN 150 0.0144 1.36 0.1
--.SDI.Z. 1997-09-14T15:40:27.46 10.0 undecidable manual PN 150 0.0144 0.71 0.7
--.MNS.Z. 1997-09-14T15:40:22.74 10.0 undecidable manual SG 184 0.0066 -1.27 0.1
--.PQ9.Z. 1997-09-14T15:40:20.94 10.0 undecidable manual PN 156 0.0107 -0.1 1.4
--.AQU.Z. 1997-09-14T15:40:16.60 10.0 undecidable manual PG 147 0.008 0.24 1.6
--.ARV.Z. 1997-09-14T15:40:13.95 10.0 undecidable manual SG 19 0.0036 0.25 0.7
--.MNS.Z. 1997-09-14T15:40:12.25 10.0 undecidable manual PG 184 0.0066 -1.04 0.5
--.ARV.Z. 1997-09-14T15:40:06.75 10.0 undecidable manual PG 19 0.0036 -0.59 1.2
--.ASS.Z. 1997-09-14T15:40:04.68 10.0 undecidable manual SG 235 0.0008 1.13 0.2
--.ASS.Z. 1997-09-14T15:40:01.53 10.0 positive manual PG 235 0.0008 0.05 3.6
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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