Earthquake with magnitude of Md 2.0 on date 25-04-1998 and time 22:26:50 (UTC) in region 4 km NE Nocera Umbra (PG)

A magnitude Md 2.0 earthquake occured in region: 4 km NE Nocera Umbra (PG), on

  • 25-04-1998 22:26:50 (UTC)
  • 26-04-1998 00:26:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.14, 12.82 at 0 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 4 5839 5839
Gualdo Tadino PG 10 15208 21047
Valtopina PG 11 1398 22445
Fiuminata MC 11 1402 23847
Sefro MC 11 422 24269
Serravalle di Chienti MC 14 1070 25339
Pioraco MC 14 1134 26473
Esanatoglia MC 16 2034 28507
Valfabbrica PG 17 3389 31896
Fossato di Vico PG 18 2840 34736
Assisi PG 18 28299 63035
Muccia MC 20 915 63950

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NE of Foligno (57155 inhabitants)
35 Km E of Perugia (166134 inhabitants)
66 Km N of Terni (111501 inhabitants)
78 Km SW of Ancona (100861 inhabitants)
80 Km S of Fano (60888 inhabitants)
84 Km E of Arezzo (99543 inhabitants)
86 Km S of Pesaro (94582 inhabitants)
90 Km NW of Teramo (54892 inhabitants)
99 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 2.0
ML-VAX 1.5
1998-04-25
22:26:50
43.14 12.82 0 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 336459
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1998-04-25 22:26:50 ± 0.325
Latitude 43.14 ± 0.01
Longitude 12.82 ± 0.01
Depth (km) 0 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 336459

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) 1573.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 121
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
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) 0.00121
Epicentral distance of station farthest from the epicenter (degree) 0.00494
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

Md:2

Field Value
Value 2
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 336459
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:15:10

ML:1.5

Field Value
Value 1.5
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 336459
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. 1998-04-25T22:27:07.42 10.0 undecidable manual SG! 356 0.0049 -3.95 0
--.NRCA.Z. 1998-04-25T22:27:05.37 10.0 undecidable manual SG 144 0.0034 0.59 0.2
--.FB9.Z. 1998-04-25T22:27:02.63 10.0 undecidable manual PG 356 0.0049 0.2 1.2
--.NRCA.Z. 1998-04-25T22:26:58.22 10.0 undecidable manual PG 144 0.0034 -0.4 1
--.ASS.Z. 1998-04-25T22:26:56.21 10.0 undecidable manual SG 235 0.0013 0.45 0.4
--.SNTG.Z. 1998-04-25T22:26:55.97 10.0 undecidable manual SG 38 0.0012 0.22 0.7
--.ASS.Z. 1998-04-25T22:26:53.10 10.0 undecidable manual PG 235 0.0013 -0.41 1
--.SNTG.Z. 1998-04-25T22:26:53.80 10.0 positive manual PG 38 0.0012 -0.33 2.6
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download