Earthquake with magnitude of Md 2.1 on date 20-03-1998 and time 08:43:30 (UTC) in region 7 km S Serra Sant'Abbondio (PU)

A magnitude Md 2.1 earthquake occured in region: 7 km S Serra Sant'Abbondio (PU), on

  • 20-03-1998 08:43:30 (UTC)
  • 20-03-1998 09:43:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.4300, 12.7540 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
Serra Sant'Abbondio PU 7 1027 1027
Scheggia e Pascelupo PG 7 1393 2420
Costacciaro PG 9 1216 3636
Sassoferrato AN 9 7285 10921
Frontone PU 10 1300 12221
Sigillo PG 11 2404 14625
Cantiano PU 11 2245 16870
Genga AN 15 1797 18667
Fossato di Vico PG 15 2840 21507
Cagli PU 16 8731 30238
Fabriano AN 16 31480 61718
Pergola PU 16 6333 68051
Gubbio PG 16 32216 100267
Arcevia AN 17 4612 104879

Municipalities with at least 50000 inhabitants

An earthquake occurred to
46 Km NE of Perugia (166134 inhabitants)
51 Km SW of Fano (60888 inhabitants)
53 Km N of Foligno (57155 inhabitants)
55 Km S of Pesaro (94582 inhabitants)
65 Km W of Ancona (100861 inhabitants)
70 Km E of Arezzo (99543 inhabitants)
72 Km S of Rimini (147750 inhabitants)
89 Km SE of Cesena (96758 inhabitants)
97 Km N of Terni (111501 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
Bulletin
Rev1000
Md 2.1 1998-03-20
08:43:30
43.43 12.754 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 325729
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1998-03-20 08:43:30 ± 0.41
Latitude 43.4300 ± 0.0161
Longitude 12.7540 ± 0.0381
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 325729

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) 3555.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 172
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) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00138
Epicentral distance of station farthest from the epicenter (degree) 0.00583
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:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 325729
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:05:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.NRCA.Z. 1998-03-20T08:43:53.50 10.0 undecidable manual SG 156 0.6438 -0.71 0.3
--.NRCA.Z. 1998-03-20T08:43:44.50 10.0 undecidable manual PG 156 0.6438 0.33 1.2
--.FB9.Z. 1998-03-20T08:43:42.50 10.0 undecidable manual SG 3 0.2553 1.78 0
--.SNTG.Z. 1998-03-20T08:43:40.50 10.0 undecidable manual SG 142 0.2109 1.36 0.1
--.ASS.Z. 1998-03-20T08:43:38.50 10.0 undecidable manual PG 191 0.3663 -0.33 1.6
--.FB9.Z. 1998-03-20T08:43:36.00 10.0 undecidable manual PG 3 0.2553 -0.38 1.7
--.ARV.Z. 1998-03-20T08:43:36.00 10.0 undecidable manual SG 63 0.1554 -0.64 0.7
--.SNTG.Z. 1998-03-20T08:43:35.50 10.0 undecidable manual PG 142 0.2109 0.03 1.9
--.ARV.Z. 1998-03-20T08:43:33.50 10.0 undecidable manual PG 63 0.1554 -0.52 1.4
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download