Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 09-12-2021 and time 08:35:20 (Italy) in region 4 km SE Capitignano (AQ)

A magnitude ML 1.3 earthquake occured in region: 4 km SE Capitignano (AQ), on

  • 09-12-2021 07:35:20 (UTC)
  • 09-12-2021 08:35:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.4910, 13.3300 at 13 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
Capitignano AQ 4 665 665
Barete AQ 6 737 1402
Pizzoli AQ 7 4326 5728
Montereale AQ 8 2581 8309
Campotosto AQ 8 542 8851
Cagnano Amiterno AQ 9 1369 10220
Crognaleto TE 14 1297 11517
Scoppito AQ 15 3727 15244
Amatrice RI 16 2657 17901
Borbona RI 16 617 18518
L'Aquila AQ 17 69753 88271
Fano Adriano TE 18 296 88567
Pietracamela TE 19 271 88838
Posta RI 20 694 89532
Cittareale RI 20 482 90014

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km NW of L'Aquila (69753 inhabitants)
36 Km SW of Teramo (54892 inhabitants)
57 Km E of Terni (111501 inhabitants)
67 Km W of Montesilvano (53738 inhabitants)
71 Km W of Chieti (51815 inhabitants)
73 Km W of Pescara (121014 inhabitants)
73 Km SE of Foligno (57155 inhabitants)
73 Km NE of Tivoli (56533 inhabitants)
74 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km NE of Roma (2864731 inhabitants)
100 Km NE of Velletri (53303 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 		ML 1.3 2021-12-09
07:35:20		 42.4912 13.3302 13 2022-03-30
13:04:27		 Bollettino Sismico Italiano INGV 99434851
Reviewed
Rev100 		ML 1.5 2021-12-09
07:35:20		 42.5043 13.3133 8 2021-12-09
07:45:32		 Sala Sismica INGV-Roma 98338901
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-09 07:35:20 ± 0.12
Latitude 42.4912 ± 0.0072
Longitude 13.3302 ± 0.0098
Depth (km) 13 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99434851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 799
Semi-minor axis of confidence ellipse (meter) 527
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 218
Circular confidence region, given by single value of horizontal uncertainty (meter) 800.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.07285
Epicentral distance of station farthest from the epicenter (degree) 0.60704
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:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 98338901
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-09 07:45:32

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 99434851
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-15 14:11:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-12-09T07:35:41.70 0.6 undecidable manual S 351 67.377 92 0.74 50
IV.MC2.EHZ. 2021-12-09T07:35:36.40 0.6 undecidable manual S 346 48.0186 93 0.61 55
IV.MMO1.EHE. 2021-12-09T07:35:35.40 0.6 undecidable manual S 360 45.3213 93 0.34 59
IV.NRCA.HHZ. 2021-12-09T07:35:34.10 0.6 undecidable manual S 335 41.8248 93 -0.05 62
IV.CSP1.EHZ. 2021-12-09T07:35:32.53 0.6 undecidable manual P 351 67.377 92 0.21 58
IV.FAGN.HHZ. 2021-12-09T07:35:32.40 0.6 undecidable manual S 140 32.5452 95 0.74 52
IV.TERO.HHZ. 2021-12-09T07:35:29.80 0.3 undecidable manual S 57 26.751 97 -0.32 91
IV.MC2.EHZ. 2021-12-09T07:35:29.42 0.6 undecidable manual P 346 48.0186 93 0.09 62
IV.LNSS.HHE. 2021-12-09T07:35:29.80 0.3 undecidable manual S 298 26.751 97 -0.33 90
IV.GIGS.HHN. 2021-12-09T07:35:28.10 0.3 undecidable manual S 102 20.2686 102 -0.33 92
IV.NRCA.HHZ. 2021-12-09T07:35:28.13 0.3 undecidable manual P 335 41.8248 93 -0.25 89
IV.MMO1.EHE. 2021-12-09T07:35:28.39 0.6 undecidable manual P 360 45.3213 93 -0.52 55
IV.ARRO.EHZ. 2021-12-09T07:35:28.92 0.3 undecidable manual P 282 47.1195 93 -0.28 88
IV.FAGN.HHZ. 2021-12-09T07:35:27.73 0.3 undecidable manual P 140 32.5452 95 0.78 77
IV.SMA1.EHZ. 2021-12-09T07:35:27.30 0.3 undecidable manual S 2 15.4734 112 0.1 97
IV.FIAM.HNN. 2021-12-09T07:35:26.31 0.6 undecidable manual P 215 30.2475 96 -0.3 61
IV.LNSS.HHE. 2021-12-09T07:35:25.83 0.3 undecidable manual P 298 26.751 97 -0.23 92
IV.TERO.HHZ. 2021-12-09T07:35:25.73 0.3 undecidable manual P 57 26.751 97 -0.33 91
IV.CAMP.HHZ. 2021-12-09T07:35:25.50 0.3 undecidable manual S 52 8.0808 138 -0.09 100
IV.SMA1.EHZ. 2021-12-09T07:35:24.56 0.3 undecidable manual P 2 15.4734 112 0.19 95
IV.GIGS.HHN. 2021-12-09T07:35:24.88 0.3 undecidable manual P 102 20.2686 102 -0.2 95
IV.CAMP.HHZ. 2021-12-09T07:35:23.56 0.3 undecidable manual P 52 8.0808 138 0.12 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CAMP.HHN. ML:1.2 0.0001630429 0.384 AML other m 2021-12-09T07:35:25.78
IV.CAMP.HHE. ML:0.8 0.00007149528499999999 0.32 AML other m 2021-12-09T07:35:26.56
IV.SMA1.EHE. ML:1.6 0.0003555 1.72 AML other m 2021-12-09T07:35:27.13
IV.SMA1.EHN. ML:1.4 0.00021500000000000002 1.72 AML other m 2021-12-09T07:35:28.03
IV.TERO.HHE. ML:1.7 0.00026949999999999994 1 AML other m 2021-12-09T07:35:30.19
IV.TERO.HHN. ML:1.1 0.000065609225 0.224 AML other m 2021-12-09T07:35:31.43
IV.NRCA.HHE. ML:1.6 0.000140937445 0.096 AML other m 2021-12-09T07:35:35.24
IV.NRCA.HNE. ML:1.6 0.00013192177 0.1088 AML other m 2021-12-09T07:35:35.24
IV.NRCA.HHN. ML:1.2 0.000057136559999999995 0.16 AML other m 2021-12-09T07:35:36.03
IV.TERO.HNE. ML:0.9 0.000041916920000000007 0.1216 AML other m 2021-12-09T07:35:30.67
IV.TERO.HNN. ML:1.1 0.000057865064999999993 0.2304 AML other m 2021-12-09T07:35:30.09
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