Earthquake with magnitude of Md 2.3 on date 21-02-1998 and time 15:35:11 (Italy) in region 1 km SW Preci (PG)

A magnitude Md 2.3 earthquake occured in region: 1 km SW Preci (PG), on

  • 21-02-1998 14:35:11 (UTC)
  • 21-02-1998 15:35:11 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.87, 13.03 at 6 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
Preci PG 2 724 724
Sellano PG 8 1079 1803
Visso MC 9 1107 2910
Norcia PG 10 4957 7867
Cerreto di Spoleto PG 11 1075 8942
Castelsantangelo sul Nera MC 11 281 9223
Ussita MC 12 444 9667
Monte Cavallo MC 14 145 9812
Cascia PG 17 3217 13029
Vallo di Nera PG 17 364 13393
Poggiodomo PG 19 117 13510
Fiordimonte MC 19 202 13712
Pieve Torina MC 20 1458 15170

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Foligno (57155 inhabitants)
46 Km NE of Terni (111501 inhabitants)
58 Km E of Perugia (166134 inhabitants)
60 Km W of Teramo (54892 inhabitants)
65 Km NW of L'Aquila (69753 inhabitants)
91 Km NE of Viterbo (67173 inhabitants)
92 Km SW of Ancona (100861 inhabitants)
100 Km N of Guidonia Montecelio (88673 inhabitants)
100 Km W of Montesilvano (53738 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 2.3
ML-VAX 1.7
1998-02-21
14:35:11
42.87 13.03 6 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 323649
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1998-02-21 14:35:11 ± 0.277
Latitude 42.87 ± 0.01
Longitude 13.03 ± 0.02
Depth (km) 6 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 323649

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) 2121.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 157
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
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) 0.003
Epicentral distance of station farthest from the epicenter (degree) 0.01166
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:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 323649
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:03:26

ML:1.7

Field Value
Value 1.7
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 323649
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. 1998-02-21T14:35:36.94 10.0 undecidable manual PN 152 0.0117 1.01 0.3
--.ARV.Z. 1998-02-21T14:35:33.69 10.0 undecidable manual SG 354 0.0057 -0.64 0.4
--.AQU.Z. 1998-02-21T14:35:32.67 10.0 undecidable manual SG 151 0.0053 -0.27 0.5
--.MNS.Z. 1998-02-21T14:35:32.30 10.0 undecidable manual SG 207 0.0049 0.31 0.7
--.SNTG.Z. 1998-02-21T14:35:25.75 10.0 undecidable manual SG 350 0.0035 -0.75 0.3
--.ASS.Z. 1998-02-21T14:35:24.60 10.0 undecidable manual SG 304 0.003 0.2 0.6
--.ARV.Z. 1998-02-21T14:35:24.86 10.0 undecidable manual PG 354 0.0057 0.21 1.8
--.AQU.Z. 1998-02-21T14:35:23.83 10.0 undecidable manual PG 151 0.0053 -0.01 1.9
--.MNS.Z. 1998-02-21T14:35:22.43 10.0 undecidable manual PG 207 0.0049 -0.7 0.7
--.SNTG.Z. 1998-02-21T14:35:20.26 10.0 undecidable manual PG 350 0.0035 0.14 1.9
--.ASS.Z. 1998-02-21T14:35:18.84 10.0 undecidable manual PG 304 0.003 -0.07 2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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