Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 10-09-2021 and time 03:46:33 (Italy) in region 5 km NE Antrodoco (RI)

A magnitude ML 0.8 earthquake occured in region: 5 km NE Antrodoco (RI), on

  • 10-09-2021 01:46:33 (UTC)
  • 10-09-2021 03:46:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.4550, 13.1230 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Antrodoco RI 5 2588 2588
Micigliano RI 6 127 2715
Borbona RI 7 617 3332
Borgo Velino RI 8 972 4304
Posta RI 8 694 4998
Cagnano Amiterno AQ 8 1369 6367
Castel Sant'Angelo RI 10 1308 7675
Montereale AQ 13 2581 10256
Barete AQ 13 737 10993
Scoppito AQ 14 3727 14720
Pizzoli AQ 14 4326 19046
Cittaducale RI 16 6828 25874
Capitignano AQ 16 665 26539
Leonessa RI 18 2435 28974
Cantalice RI 18 2755 31729
Petrella Salto RI 18 1197 32926
Concerviano RI 18 291 33217
Cittareale RI 19 482 33699

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km W of L'Aquila (69753 inhabitants)
41 Km E of Terni (111501 inhabitants)
53 Km W of Teramo (54892 inhabitants)
60 Km NE of Guidonia Montecelio (88673 inhabitants)
61 Km NE of Tivoli (56533 inhabitants)
65 Km SE of Foligno (57155 inhabitants)
82 Km NE of Roma (2864731 inhabitants)
84 Km E of Viterbo (67173 inhabitants)
85 Km W of Montesilvano (53738 inhabitants)
87 Km W of Chieti (51815 inhabitants)
90 Km W of Pescara (121014 inhabitants)
90 Km NE of Velletri (53303 inhabitants)
94 Km SE of Perugia (166134 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 0.8 2021-09-10
01:46:33		 42.4548 13.1228 10 2021-09-10
01:50:56		 Sala Sismica INGV-Roma 95254711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-10 01:46:33 ± 0.04
Latitude 42.4548 ± 0.0027
Longitude 13.1228 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95254711

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 365
Semi-minor axis of confidence ellipse (meter) 210
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 128
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 130
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.09
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.37861
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 95254711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-10 01:50:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MURB.HHZ. 2021-09-10T01:47:02.95 3.0 undecidable manual S -0.1 0
IV.NRCA.HHZ. 2021-09-10T01:46:47.15 0.1 undecidable manual S 359 42.0246 50 -0.02 96
IV.ROM9.HNZ. 2021-09-10T01:46:46.60 3.0 positive manual P -0.05 0
IV.ARRO.EHZ. 2021-09-10T01:46:44.53 0.1 undecidable manual S 295 32.2455 50 -0.04 97
IV.SMA1.EHZ. 2021-09-10T01:46:42.94 0.1 undecidable manual S 42 26.0517 50 0.02 99
IV.FIAM.HHZ. 2021-09-10T01:46:41.33 0.1 undecidable manual S 181 20.7681 117 -0.05 99
IV.NRCA.HHZ. 2021-09-10T01:46:41.28 0.6 undecidable manual P 359 42.0246 50 -0.04 48
IV.ARRO.EHZ. 2021-09-10T01:46:39.95 0.6 negative manual P 295 32.2455 50 0.13 48
IV.RM33.EHZ. 2021-09-10T01:46:38.14 0.1 undecidable manual S 51 9.5793 137 -0.09 100
IV.FIAM.HHZ. 2021-09-10T01:46:38.09 1.0 undecidable manual P 181 20.7681 117 0.11 24
IV.SMA1.EHZ. 2021-09-10T01:46:38.80 0.6 undecidable manual P 42 26.0517 50 -0.07 49
IV.RM33.EHZ. 2021-09-10T01:46:36.36 0.3 undecidable manual P 51 9.5793 137 0.2 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHE. ML:1.5 0.000368 0.28 AML other m 2021-09-10T01:46:38.29
IV.RM33.EHN. ML:1.1 0.000148 0.14 AML other m 2021-09-10T01:46:38.64
IV.FIAM.HHE. ML:0.2 0.000011099999999999999 1.48 AML other m 2021-09-10T01:46:41.90
IV.FIAM.HHN. ML:0.3 0.00001365 0.78 AML other m 2021-09-10T01:46:42.30
IV.SMA1.EHN. ML:0.6 0.0000235 0.74 AML other m 2021-09-10T01:46:42.59
IV.SMA1.EHE. ML:0.7 0.0000281 1.48 AML other m 2021-09-10T01:46:46.04
IV.NRCA.HHN. ML:1.0 0.00003345 0.66 AML other m 2021-09-10T01:46:47.51
IV.NRCA.HHE. ML:1.0 0.0000324 0.08 AML other m 2021-09-10T01:46:47.76
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