Earthquake with magnitude of Md 2.3 on date 12-02-1998 and time 01:39:18 (Italy) in region 3 km W Norcia (PG)

A magnitude Md 2.3 earthquake occured in region: 3 km W Norcia (PG), on

  • 12-02-1998 00:39:18 (UTC)
  • 12-02-1998 01:39:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8, 13.06 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
Norcia PG 3 4957 4957
Preci PG 9 724 5681
Cascia PG 10 3217 8898
Cerreto di Spoleto PG 12 1075 9973
Castelsantangelo sul Nera MC 13 281 10254
Visso MC 14 1107 11361
Sellano PG 15 1079 12440
Poggiodomo PG 15 117 12557
Vallo di Nera PG 17 364 12921
Ussita MC 17 444 13365
Monteleone di Spoleto PG 19 599 13964
Accumoli RI 19 667 14631
Arquata del Tronto AP 20 1178 15809

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km SE of Foligno (57155 inhabitants)
43 Km NE of Terni (111501 inhabitants)
55 Km W of Teramo (54892 inhabitants)
57 Km NW of L'Aquila (69753 inhabitants)
64 Km SE of Perugia (166134 inhabitants)
89 Km E of Viterbo (67173 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km W of Montesilvano (53738 inhabitants)
96 Km N of Tivoli (56533 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 2.3 1998-02-12
00:39:18
42.81 13.06 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 322809
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1998-02-12 00:39:18 ± 0.192
Latitude 42.81 ± 0.01
Longitude 13.06 ± 0.03
Depth (km) 10 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 322809

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) 2935.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 98
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) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.0004
Epicentral distance of station farthest from the epicenter (degree) 0.00461
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 322809
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:02:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MNS.Z. 1998-02-12T00:39:36.42 10.0 undecidable manual SG 213 0.0045 0.02 0.7
--.SNTG.Z. 1998-02-12T00:39:35.90 10.0 undecidable manual SG 348 0.004 0.2 0.7
--.ASS.Z. 1998-02-12T00:39:32.50 10.0 undecidable manual SG 310 0.0035 -0.38 0.6
--.AQU.Z. 1998-02-12T00:39:29.51 10.0 undecidable manual PG 150 0.0046 0.59 1
--.MNS.Z. 1998-02-12T00:39:28.30 10.0 undecidable manual PG 213 0.0045 -0.44 1.3
--.ASS.Z. 1998-02-12T00:39:27.51 10.0 undecidable manual PG 310 0.0035 0.81 0.7
--.SNTG.Z. 1998-02-12T00:39:27.60 10.0 undecidable manual PG 348 0.004 -0.27 1.6
--.NRCA.Z. 1998-02-12T00:39:22.93 10.0 undecidable manual SG 52 0.0004 0.77 0.3
--.NRCA.Z. 1998-02-12T00:39:19.81 10.0 positive manual PG 52 0.0004 -0.7 2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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