Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 14-10-2021 and time 07:33:36 (Italy) in region 3 km S Accumoli (RI)

A magnitude ML 1.2 earthquake occured in region: 3 km S Accumoli (RI), on

  • 14-10-2021 05:33:36 (UTC)
  • 14-10-2021 07:33:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6730, 13.2550 at 11 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
Accumoli RI 3 667 667
Amatrice RI 6 2657 3324
Cittareale RI 10 482 3806
Arquata del Tronto AP 12 1178 4984
Campotosto AQ 16 542 5526
Montereale AQ 17 2581 8107
Acquasanta Terme AP 17 2916 11023
Capitignano AQ 17 665 11688
Norcia PG 19 4957 16645
Montegallo AP 20 523 17168

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km W of Teramo (54892 inhabitants)
38 Km NW of L'Aquila (69753 inhabitants)
51 Km E of Terni (111501 inhabitants)
55 Km SE of Foligno (57155 inhabitants)
75 Km W of Montesilvano (53738 inhabitants)
82 Km W of Pescara (121014 inhabitants)
83 Km W of Chieti (51815 inhabitants)
86 Km SE of Perugia (166134 inhabitants)
86 Km NE of Guidonia Montecelio (88673 inhabitants)
87 Km NE of Tivoli (56533 inhabitants)
98 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
Reviewed
Rev100 		ML 1.2 2021-10-14
05:33:36		 42.673 13.2552 11 2021-10-14
06:11:05		 Sala Sismica INGV-Roma 96531361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-14 05:33:36 ± 0.09
Latitude 42.6730 ± 0.0045
Longitude 13.2552 ± 0.0061
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96531361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 488
Semi-minor axis of confidence ellipse (meter) 354
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 223
Circular confidence region, given by single value of horizontal uncertainty (meter) 490.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 134
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.26080
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 96531361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-14 06:11:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SCHR.EHZ. 2021-10-14T05:35:14.42 3.0 undecidable manual Sg 6.76 0
IV.CDRU.HHZ. 2021-10-14T05:35:03.68 3.0 undecidable manual Sg 10.03 0
OX.MPRI.HHZ. 2021-10-14T05:35:01.58 3.0 undecidable manual Sn 0.54 0
IV.MCRV.HHZ. 2021-10-14T05:34:50.66 3.0 undecidable manual Sg 4.01 0
IV.MTSN.HNZ. 2021-10-14T05:34:49.42 3.0 undecidable manual Sn -9.99 0
GU.MGRO.HHZ. 2021-10-14T05:34:34.61 3.0 undecidable manual Pg 5.1 0
IV.VARE.HHZ. 2021-10-14T05:34:33.06 3.0 undecidable manual Pg -0.41 0
IV.GRIS.EHZ. 2021-10-14T05:34:33.65 3.0 undecidable manual Pg 4.73 0
IV.CMPR.HHZ. 2021-10-14T05:34:24.78 3.0 undecidable manual Pg 5.43 0
IV.ZEN8.HNZ. 2021-10-14T05:34:23.82 3.0 positive manual Pg 4.47 0
IV.TST02.HHZ. 2021-10-14T05:34:21.56 3.0 undecidable manual Sg 3.83 0
SI.ROSI.HHZ. 2021-10-14T05:34:20.69 3.0 negative manual Pn -9.99 0
ST.CARE.HNZ. 2021-10-14T05:34:17.07 3.0 undecidable manual Pn -9.99 0
OX.MPRI.HHZ. 2021-10-14T05:34:15.61 3.0 undecidable manual Pn -6.02 0
IV.RNI2.HHZ. 2021-10-14T05:34:13.42 3.0 undecidable manual Sn -6.2 0
OT.OT11.EHZ. 2021-10-14T05:34:06.40 3.0 positive manual Pg -1.39 0
IV.IFOR.HHZ. 2021-10-14T05:34:05.82 3.0 undecidable manual Pg -2.56 0
IV.MC2.EHZ. 2021-10-14T05:34:03.55 3.0 undecidable manual Sg 4.62 0
IV.RIBO.EHZ.01 2021-10-14T05:34:01.04 3.0 undecidable manual Sn -9.99 0
IV.PE3.EHZ. 2021-10-14T05:34:01.91 3.0 undecidable manual Sn -4.64 0
IV.PP3.EHZ. 2021-10-14T05:33:45.39 3.0 negative manual P -4.1 0
IV.TERO.HHZ. 2021-10-14T05:33:45.91 0.6 undecidable manual S 101 28.9488 91 -0.39 46
IV.NRCA.HHZ. 2021-10-14T05:33:44.02 0.3 undecidable manual S 327 21.1677 92 -0.2 72
IV.RM33.EHZ. 2021-10-14T05:33:43.28 0.3 undecidable manual S 190 18.4704 92 -0.22 73
IV.LNSS.HHZ. 2021-10-14T05:33:43.72 0.3 undecidable manual S 246 19.1697 92 0.04 75
IV.TERO.HHZ. 2021-10-14T05:33:42.16 0.3 undecidable manual P 101 28.9488 91 0.17 72
IV.NRCA.HHZ. 2021-10-14T05:33:40.86 0.1 negative manual P 327 21.1677 92 0.07 99
IV.RM33.EHZ. 2021-10-14T05:33:40.44 0.1 undecidable manual P 190 18.4704 92 0.06 99
IV.LNSS.HHZ. 2021-10-14T05:33:40.51 0.1 undecidable manual P 246 19.1697 92 0.03 100
IV.SMA1.EHZ. 2021-10-14T05:33:40.80 0.6 undecidable manual S 126 8.0808 131 -0.1 50
IV.SMA1.EHZ. 2021-10-14T05:33:39.05 0.1 undecidable manual P 126 8.0808 131 0.18 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.0 0.00012867404999999997 0.1792 AML other m 2021-10-14T05:33:41.22
IV.SMA1.EHN. ML:1.0 0.00013659106500000002 0.2176 AML other m 2021-10-14T05:33:41.29
IV.RM33.HNE. ML:1.2 0.00012731115 0.4128 AML other m 2021-10-14T05:33:44.12
IV.RM33.HNN. ML:1.3 0.000138344865 0.7296 AML other m 2021-10-14T05:33:52.19
IV.RM33.EHE. ML:1.0 0.00007145337000000001 0.2784 AML other m 2021-10-14T05:33:45.06
IV.RM33.EHN. ML:0.9 0.000063609865 1.5808 AML other m 2021-10-14T05:33:53.05
IV.LNSS.HNE. ML:1.3 0.00013605485 0.72 AML other m 2021-10-14T05:33:40.26
IV.LNSS.HNN. ML:1.4 0.00019112104 0.7616 AML other m 2021-10-14T05:33:40.81
IV.LNSS.HHE. ML:0.8 0.00004830481 0.0992 AML other m 2021-10-14T05:33:43.97
IV.LNSS.HHN. ML:1.0 0.00007050813 0.2816 AML other m 2021-10-14T05:33:43.87
IV.NRCA.HNE. ML:1.2 0.0001175745 0.4896 AML other m 2021-10-14T05:33:48.46
IV.NRCA.HNN. ML:1.5 0.00020343265 0.7584 AML other m 2021-10-14T05:33:42.45
IV.NRCA.HHE. ML:1.0 0.00007669293500000001 0.1408 AML other m 2021-10-14T05:33:44.57
IV.NRCA.HHN. ML:1.0 0.00006722416 0.0832 AML other m 2021-10-14T05:33:44.51
IV.TERO.HHE. ML:1.2 0.00008326596 0.5184 AML other m 2021-10-14T05:33:44.95
IV.TERO.HHN. ML:1.2 0.00006773292 0.08 AML other m 2021-10-14T05:33:46.85
IV.TERO.HNE. ML:1.4 0.00012917725 0.7424 AML other m 2021-10-14T05:33:52.74
IV.TERO.HNN. ML:1.4 0.000132444125 0.9504 AML other m 2021-10-14T05:33:59.56
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