Earthquake with magnitude of Md 2.4 on date 28-09-1997 and time 05:30:12 (Italy) in region 5 km NE Trevi (PG)

A magnitude Md 2.4 earthquake occured in region: 5 km NE Trevi (PG), on

  • 28-09-1997 03:30:12 (UTC)
  • 28-09-1997 05:30:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.92, 12.78 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
Trevi PG 5 8469 8469
Foligno PG 7 57155 65624
Montefalco PG 10 5679 71303
Campello sul Clitunno PG 11 2442 73745
Spello PG 12 8645 82390
Sellano PG 13 1079 83469
Bevagna PG 14 5081 88550
Castel Ritaldi PG 14 3278 91828
Valtopina PG 16 1398 93226
Cerreto di Spoleto PG 16 1075 94301
Cannara PG 18 4305 98606
Gualdo Cattaneo PG 18 6155 104761
Vallo di Nera PG 18 364 105125
Giano dell'Umbria PG 19 3846 108971

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km SE of Foligno (57155 inhabitants)
38 Km SE of Perugia (166134 inhabitants)
41 Km N of Terni (111501 inhabitants)
78 Km NE of Viterbo (67173 inhabitants)
81 Km W of Teramo (54892 inhabitants)
81 Km NW of L'Aquila (69753 inhabitants)
95 Km SE of Arezzo (99543 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 2.4
ML-VAX 1.5
1997-09-28
03:30:12
42.92 12.78 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 282669
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-09-28 03:30:12 ± 0.247
Latitude 42.92 ± 0.02
Longitude 12.78 ± 0.05
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 282669

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) 4128.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 140
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00146
Epicentral distance of station farthest from the epicenter (degree) 0.01287
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 282669
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:26:41

ML:1.5

Field Value
Value 1.5
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 282669
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. 1997-09-28T03:30:39.70 10.0 undecidable manual PN 147 0.0129 0.26 1.2
--.FB9.Z. 1997-09-28T03:30:38.54 10.0 undecidable manual SG 0 0.0069 -1.41 0.1
--.CSNT.Z. 1997-09-28T03:30:36.69 10.0 undecidable manual PN 297 0.0108 0.88 1
--.RSM.Z. 1997-09-28T03:30:34.83 10.0 undecidable manual PG 346 0.0093 1.67 0.2
--.PQ9.Z. 1997-09-28T03:30:33.37 10.0 undecidable manual PG 152 0.0091 0.7 1.1
--.MNS.Z. 1997-09-28T03:30:32.00 10.0 undecidable manual SG 187 0.0048 -0.5 0.5
--.CRE.Z. 1997-09-28T03:30:31.14 10.0 undecidable manual PG 319 0.0083 0.1 1.7
--.FB9.Z. 1997-09-28T03:30:28.34 10.0 undecidable manual PG 0 0.0069 0.07 1.9
--.AQU.Z. 1997-09-28T03:30:26.60 10.0 undecidable manual PG 140 0.0066 -0.9 1
--.MNS.Z. 1997-09-28T03:30:23.80 10.0 undecidable manual PG 187 0.0048 -0.17 1.8
--.ASS.Z. 1997-09-28T03:30:18.50 10.0 undecidable manual SG 327 0.0015 -0.51 0.5
--.ASS.Z. 1997-09-28T03:30:15.50 10.0 undecidable manual PG 327 0.0015 -0.68 1.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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