Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 26-08-2012 and time 04:29:14 (Italy) in region 4 km W Valle Castellana (TE)

A magnitude ML 1.0 earthquake occured in region: 4 km W Valle Castellana (TE), on

  • 26-08-2012 02:29:14 (UTC)
  • 26-08-2012 04:29:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7200, 13.4530 at 18 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
Valle Castellana TE 4 977 977
Acquasanta Terme AP 7 2916 3893
Rocca Santa Maria TE 7 537 4430
Cortino TE 12 656 5086
Arquata del Tronto AP 14 1178 6264
Roccafluvione AP 16 2010 8274
Amatrice RI 17 2657 10931
Montegallo AP 17 523 11454
Accumoli RI 17 667 12121
Torricella Sicura TE 18 2641 14762
Ascoli Piceno AP 18 49407 64169
Venarotta AP 18 2066 66235
Civitella del Tronto TE 18 5116 71351
Folignano AP 19 9241 80592
Crognaleto TE 19 1297 81889
Campli TE 19 7209 89098
Campotosto AQ 19 542 89640
Fano Adriano TE 20 296 89936
Palmiano AP 20 196 90132

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km W of Teramo (54892 inhabitants)
41 Km N of L'Aquila (69753 inhabitants)
61 Km W of Montesilvano (53738 inhabitants)
67 Km E of Foligno (57155 inhabitants)
68 Km E of Terni (111501 inhabitants)
69 Km W of Pescara (121014 inhabitants)
72 Km NW of Chieti (51815 inhabitants)
97 Km E of Perugia (166134 inhabitants)
100 Km NE of Tivoli (56533 inhabitants)
100 Km NE of Guidonia Montecelio (88673 inhabitants)
100 Km S 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
Reviewed
Rev100 		ML 1.0 2012-08-26
02:29:14		 42.7368 13.4598 15 2014-10-21
12:08:56		 Sala Sismica INGV-Roma 2070871
Bulletin
Rev1000 		ML 1.0 2012-08-26
02:29:14		 42.7197 13.4528 18 2014-09-19
08:14:18		 Bollettino Sismico Italiano INGV 3027861
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2012-08-26 02:29:14 ± 0.14
Latitude 42.7197 ± 0.0081
Longitude 13.4528 ± 0.0061
Depth (km) 18 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 3027861

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 810
Semi-minor axis of confidence ellipse (meter) 574
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 184
Circular confidence region, given by single value of horizontal uncertainty (meter) 810.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 171
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.12411
Epicentral distance of station farthest from the epicenter (degree) 0.41459
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.4
Num. used stations 4
Type of magnitude ML
Reference to an origin 3027861
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2014-09-18 12:44:47

ML:1.0

Field Value
Value 1.0
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 2070871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2012-08-26 02:34:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2012-08-26T02:29:29.24 0.1 undecidable manual S 320 46.0206 102 0.15 91
IV.NRCA.HHZ. 2012-08-26T02:29:25.00 0.1 undecidable manual S 295 30.3474 111 -0.06 98
IV.CAMP.HHZ. 2012-08-26T02:29:22.85 0.3 undecidable manual S 190 20.6682 123 0.09 74
IV.FDMO.HHZ. 2012-08-26T02:29:22.62 0.1 undecidable manual P 320 46.0206 102 -0.15 93
IV.SMA1.EHZ. 2012-08-26T02:29:21.18 0.1 undecidable manual S 224 13.7751 136 -0.14 98
IV.TERO.HHZ. 2012-08-26T02:29:21.75 0.1 undecidable manual S 131 16.3725 131 -0.07 98
IV.NRCA.HHZ. 2012-08-26T02:29:20.34 0.1 undecidable manual P 295 30.3474 111 -0.1 96
IV.CAMP.HHZ. 2012-08-26T02:29:19.21 0.1 undecidable manual P 190 20.6682 123 0.09 98
IV.SMA1.EHZ. 2012-08-26T02:29:18.42 0.1 undecidable manual P 224 13.7751 136 0.13 98
IV.TERO.HHZ. 2012-08-26T02:29:18.62 0.1 undecidable manual P 131 16.3725 131 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:1.0 0.000027 0.22 AML other m 2012-08-26T02:29:29.51
IV.FDMO.HHE. ML:0.7 0.00001405 1.08 AML other m 2012-08-26T02:29:31.24
IV.NRCA.HHE. ML:1.6 0.00016049999999999997 0.1 AML other m 2012-08-26T02:29:25.40
IV.NRCA.HHN. ML:1.4 0.0001041 0.6 AML other m 2012-08-26T02:29:25.44
IV.SMA1.EHE. ML:1.2 0.0001255 0.22 AML other m 2012-08-26T02:29:21.56
IV.SMA1.EHN. ML:1.2 0.00010575000000000001 0.5 AML other m 2012-08-26T02:29:21.89
IV.TERO.HHN. ML:0.6 0.0000251 0.38 AML other m 2012-08-26T02:29:21.80
IV.TERO.HHE. ML:0.6 0.000023399999999999996 0.38 AML other m 2012-08-26T02:29:21.85
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