Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 10-12-2011 and time 02:38:43 (UTC) in region 4 km NE Cittareale (RI)

A magnitude ML 1.6 earthquake occured in region: 4 km NE Cittareale (RI), on

  • 10-12-2011 02:38:43 (UTC)
  • 10-12-2011 03:38:43 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6480, 13.1970 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.

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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
Cittareale RI 4 482 482
Accumoli RI 7 667 1149
Amatrice RI 8 2657 3806
Montereale AQ 14 2581 6387
Borbona RI 16 617 7004
Posta RI 16 694 7698
Arquata del Tronto AP 16 1178 8876
Capitignano AQ 17 665 9541
Cascia PG 17 3217 12758
Campotosto AQ 17 542 13300
Norcia PG 18 4957 18257

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km NW of L'Aquila (69753 inhabitants)
42 Km W of Teramo (54892 inhabitants)
46 Km E of Terni (111501 inhabitants)
53 Km SE of Foligno (57155 inhabitants)
79 Km W of Montesilvano (53738 inhabitants)
82 Km NE of Guidonia Montecelio (88673 inhabitants)
83 Km NE of Tivoli (56533 inhabitants)
83 Km SE of Perugia (166134 inhabitants)
86 Km W of Pescara (121014 inhabitants)
86 Km W of Chieti (51815 inhabitants)
93 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 1.9
ML 1.6 		2011-12-10
02:38:43		 42.648 13.197 10 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1320509
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-12-10 02:38:43 ± 0.07
Latitude 42.6480 ± 0.0036
Longitude 13.1970 ± 0.0061
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1320509

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 567
Semi-minor axis of confidence ellipse (meter) 74
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 240
Circular confidence region, given by single value of horizontal uncertainty (meter) 640.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 81
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0.10342
Epicentral distance of station farthest from the epicenter (degree) 0.47664
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.4
Num. used stations
Type of magnitude ML
Reference to an origin 1320509
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 02:14:57

Md:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 1320509
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 02:14:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FAGN.HHE. 2011-12-10T02:39:01.20 0.6 undecidable manual Sg 143 52.9026 0.434 43
IV.GUMA.HHN. 2011-12-10T02:39:00.24 0.3 undecidable manual Sg 14 47.3193 0.963 53
IV.CESI.HHE. 2011-12-10T02:38:59.07 0.1 undecidable manual Sg 329 46.2204 0.104 94
IV.FDMO.HHN. 2011-12-10T02:38:58.69 0.3 undecidable manual Sg 348 44.0226 0.306 68
IV.FIAM.HHE. 2011-12-10T02:38:57.93 0.3 undecidable manual Sg 189 42.624 -0.097 71
IV.T0104.HHE. 2011-12-10T02:38:56.02 0.3 undecidable manual Sg 160 33.9438 0.308 69
MN.AQU.HHZ. 2011-12-10T02:38:56.54 0.3 undecidable manual Sg 152 36.8298 0.081 72
IV.TERO.HHN. 2011-12-10T02:38:55.05 0.1 undecidable manual Sg 95 33.3444 -0.485 89
IV.GUMA.HHN. 2011-12-10T02:38:53.01 0.1 undecidable manual Pg 14 47.3193 0.211 92
IV.FAGN.HHE. 2011-12-10T02:38:53.54 0.3 undecidable manual Pg 143 52.9026 -0.118 69
IV.FDMO.HHN. 2011-12-10T02:38:52.04 0.1 undecidable manual Pg 348 44.0226 -0.243 92
IV.CESI.HHE. 2011-12-10T02:38:52.43 0.1 undecidable manual Pg 329 46.2204 -0.189 92
IV.NRCA.HHE. 2011-12-10T02:38:51.72 0.1 undecidable manual Sg 342 21.6672 -0.506 90
IV.CAMP.HHZ. 2011-12-10T02:38:51.73 0.3 undecidable manual Sg 126 21.3675 -0.394 69
MN.AQU.HHZ. 2011-12-10T02:38:51.01 0.3 undecidable manual Pg 152 36.8298 -0.162 71
IV.FIAM.HHE. 2011-12-10T02:38:51.91 0.1 undecidable manual Pg 189 42.624 -0.166 93
IV.LNSS.HHZ. 2011-12-10T02:38:50.00 0.1 undecidable manual Sg 249 13.7751 0.153 99
IV.TERO.HHN. 2011-12-10T02:38:50.40 0.1 undecidable manual Pg 95 33.3444 -0.237 94
IV.T0104.HHE. 2011-12-10T02:38:50.59 0.3 undecidable manual Pg 160 33.9438 -0.15 71
IV.SMA1.EHN. 2011-12-10T02:38:49.64 0.1 undecidable manual Sg 100 11.4774 0.411 94
IV.NRCA.HHE. 2011-12-10T02:38:48.52 0.1 undecidable manual Pg 342 21.6672 -0.208 96
IV.CAMP.HHZ. 2011-12-10T02:38:48.65 0.1 undecidable manual Pg 126 21.3675 -0.018 100
IV.SMA1.EHN. 2011-12-10T02:38:47.37 0.1 undecidable manual Pg 100 11.4774 0.374 94
IV.LNSS.HHZ. 2011-12-10T02:38:47.52 0.1 undecidable manual Pg 249 13.7751 0.166 98
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