Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 21-11-2005 and time 02:14:25 (Italy) in region 6 km W Arquata del Tronto (AP)

A magnitude ML 1.5 earthquake occured in region: 6 km W Arquata del Tronto (AP), on

  • 21-11-2005 01:14:25 (UTC)
  • 21-11-2005 02:14:25 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7630, 13.2310 at 8 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Arquata del Tronto AP 6 1178 1178
Accumoli RI 8 667 1845
Norcia PG 12 4957 6802
Montegallo AP 12 523 7325
Acquasanta Terme AP 15 2916 10241
Amatrice RI 16 2657 12898
Castelsantangelo sul Nera MC 16 281 13179
Cittareale RI 17 482 13661
Montemonaco AP 17 604 14265
Cascia PG 18 3217 17482

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km W of Teramo (54892 inhabitants)
48 Km N of L'Aquila (69753 inhabitants)
48 Km E of Foligno (57155 inhabitants)
53 Km E of Terni (111501 inhabitants)
79 Km E of Perugia (166134 inhabitants)
80 Km W of Montesilvano (53738 inhabitants)
87 Km W of Pescara (121014 inhabitants)
89 Km NW of Chieti (51815 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km NE of Tivoli (56533 inhabitants)
98 Km S of Ancona (100861 inhabitants)
100 Km E of Viterbo (67173 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
ML 1.5 		2005-11-21
01:14:25		 42.763 13.231 8 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 541829
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2005-11-21 01:14:25 ± 0.15
Latitude 42.7630 ± 0.0081
Longitude 13.2310 ± 0.0086
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 541829

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 659
Semi-minor axis of confidence ellipse (meter) 616
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 160
Circular confidence region, given by single value of horizontal uncertainty (meter) 1140.2
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 15
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.47
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.58006
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.5
Num. used stations
Type of magnitude ML
Reference to an origin 541829
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 10:27:29

Md:2.1

Field Value
Value 2.1
Uncertainty 0.1
Num. used stations
Type of magnitude Md
Reference to an origin 541829
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 10:27:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VCEL.EHN. 2005-11-21T01:14:47.45 0.1 undecidable manual Sg 129 64.3911 0.438 46
IV.FAGN.EHE. 2005-11-21T01:14:46.47 0.3 undecidable manual Sg 152 62.2932 0.105 33
IV.MNS.BHZ. 2005-11-21T01:14:45.01 0.1 undecidable manual Sg 227 61.3941 -1.102 26
IV.SNTG.SHZ. 2005-11-21T01:14:45.27 0.3 undecidable manual Sg 337 59.496 -0.262 27
MN.AQU.HHZ. 2005-11-21T01:14:40.77 10.0 undecidable manual Pg 0 0 0
IV.MNS.BHZ. 2005-11-21T01:14:37.10 0.1 undecidable manual Pg 227 61.3941 0.02 86
IV.TERO.HHN. 2005-11-21T01:14:37.55 0.1 undecidable manual Sg 117 34.1436 -0.468 38
IV.FAGN.EHE. 2005-11-21T01:14:37.26 0.1 undecidable manual Pg 152 62.2932 0.037 87
IV.VCEL.EHN. 2005-11-21T01:14:37.71 0.1 undecidable manual Pg 129 64.3911 0.124 88
IV.SNTG.SHZ. 2005-11-21T01:14:36.71 0.1 undecidable manual Pg 337 59.496 -0.044 82
IV.CAMP.EHE. 2005-11-21T01:14:35.80 0.1 undecidable manual Sg 150 29.0487 -0.478 40
IV.LNSS.BHE. 2005-11-21T01:14:34.29 0.1 undecidable manual Sg 221 23.5542 -0.116 46
IV.TERO.HHN. 2005-11-21T01:14:32.46 0.1 undecidable manual Pg 117 34.1436 -0.073 89
IV.CAMP.EHE. 2005-11-21T01:14:31.62 0.1 positive manual Pg 150 29.0487 0.064 93
IV.LNSS.BHE. 2005-11-21T01:14:30.94 0.1 undecidable manual Pg 221 23.5542 0.436 100
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