Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 07-11-2021 and time 09:45:52 (Italy) in region 5 km N Accumoli (RI)

A magnitude ML 1.2 earthquake occured in region: 5 km N Accumoli (RI), on

  • 07-11-2021 08:45:52 (UTC)
  • 07-11-2021 09:45:52 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7390, 13.2480 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 5 667 667
Arquata del Tronto AP 6 1178 1845
Amatrice RI 13 2657 4502
Montegallo AP 14 523 5025
Acquasanta Terme AP 14 2916 7941
Norcia PG 14 4957 12898
Cittareale RI 15 482 13380
Castelsantangelo sul Nera MC 19 281 13661
Montemonaco AP 19 604 14265
Cascia PG 19 3217 17482

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km W of Teramo (54892 inhabitants)
45 Km N of L'Aquila (69753 inhabitants)
51 Km E of Foligno (57155 inhabitants)
53 Km E of Terni (111501 inhabitants)
78 Km W of Montesilvano (53738 inhabitants)
81 Km SE of Perugia (166134 inhabitants)
85 Km W of Pescara (121014 inhabitants)
87 Km NW of Chieti (51815 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
94 Km NE of Tivoli (56533 inhabitants)
100 Km E of Viterbo (67173 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 1.2 2021-11-07
08:45:52		 42.739 13.2478 11 2021-11-07
08:52:02		 Sala Sismica INGV-Roma 97313471
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-07 08:45:52 ± 0.04
Latitude 42.7390 ± 0.0027
Longitude 13.2478 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97313471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 398
Semi-minor axis of confidence ellipse (meter) 234
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 74
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 86
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.36602
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.4
Num. used stations 22
Type of magnitude ML
Reference to an origin 97313471
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-07 08:52:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CESI.HHZ. 2021-11-07T08:46:06.10 0.6 undecidable manual S 317 40.626 50 0.13 47
IV.CSP1.EHZ. 2021-11-07T08:46:05.65 0.6 undecidable manual S 355 39.3273 50 0.03 48
IV.RM33.EHZ. 2021-11-07T08:46:01.82 0.6 undecidable manual S 186 25.6521 50 -0.16 48
IV.CSP1.EHZ. 2021-11-07T08:46:00.23 1.0 undecidable manual P 355 39.3273 50 0.11 24
IV.MMO1.EHZ. 2021-11-07T08:46:00.04 0.6 undecidable manual S 20 18.87 120 -0.11 49
IV.CESI.HHZ. 2021-11-07T08:46:00.25 0.1 undecidable manual P 317 40.626 50 -0.07 95
IV.FDMO.HHZ. 2021-11-07T08:45:59.46 0.6 positive manual P 338 35.5422 50 -0.07 48
IV.SMA1.EHZ. 2021-11-07T08:45:58.58 0.6 undecidable manual S 149 13.9749 128 -0.14 49
IV.TERO.HHZ. 2021-11-07T08:45:58.71 3.0 undecidable manual P -0.08 0
IV.MTRA.HNZ. 2021-11-07T08:45:58.14 0.6 undecidable manual S 81 12.2766 131 -0.12 50
IV.NRCA.HHZ. 2021-11-07T08:45:58.96 0.6 undecidable manual S 314 15.0738 125 -0.08 50
IV.RM33.EHZ. 2021-11-07T08:45:58.12 1.0 undecidable manual P 186 25.6521 50 0.1 24
IV.LNSS.HHZ. 2021-11-07T08:45:57.57 0.1 positive manual P 228 22.6551 50 0.01 100
IV.SMA1.EHZ. 2021-11-07T08:45:56.21 0.1 negative manual P 149 13.9749 128 0.07 100
IV.MTRA.HNZ. 2021-11-07T08:45:56.12 0.1 undecidable manual P 81 12.2766 131 0.25 97
IV.NRCA.HHZ. 2021-11-07T08:45:56.40 0.1 negative manual P 314 15.0738 125 0.08 100
IV.MMO1.EHZ. 2021-11-07T08:45:56.47 1.0 negative manual P 20 18.87 120 -0.49 23
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:0.8 0.00006652479 0.0832 AML other m 2021-11-07T08:45:58.95
IV.SMA1.EHN. ML:0.7 0.00004890063999999999 0.1152 AML other m 2021-11-07T08:45:58.67
IV.NRCA.HHN. ML:1.3 0.00017170655 0.0832 AML other m 2021-11-07T08:45:59.17
IV.NRCA.HHE. ML:1.5 0.00031713635 0.1344 AML other m 2021-11-07T08:45:59.07
IV.NRCA.HNE. ML:1.7 0.00045797845000000004 0.5824 AML other m 2021-11-07T08:46:05.72
IV.NRCA.HNN. ML:1.6 0.0004080371 0.6144 AML other m 2021-11-07T08:46:05.74
IV.LNSS.HNE. ML:1.2 0.0001028457375 0.672 AML other m 2021-11-07T08:45:59.58
IV.LNSS.HNN. ML:1.4 0.00018033925 0.832 AML other m 2021-11-07T08:46:05.61
IV.LNSS.HHE. ML:0.7 0.000027991755 0.1408 AML other m 2021-11-07T08:46:02.65
IV.LNSS.HHN. ML:0.7 0.000029760585 0.224 AML other m 2021-11-07T08:46:02.61
IV.RM33.HNE. ML:1.6 0.0002006678 1.3056 AML other m 2021-11-07T08:46:11.85
IV.RM33.HNN. ML:1.4 0.00013061502999999998 0.864 AML other m 2021-11-07T08:46:08.29
IV.RM33.EHE. ML:0.9 0.000046479955000000006 0.256 AML other m 2021-11-07T08:46:02.54
IV.RM33.EHN. ML:0.8 0.00003534072 0.16 AML other m 2021-11-07T08:46:02.25
IV.TERO.HHE. ML:1.3 0.00009247886 0.4224 AML other m 2021-11-07T08:46:14.52
IV.TERO.HHN. ML:0.8 0.000031736135 0.0576 AML other m 2021-11-07T08:46:03.81
IV.TERO.HNE. ML:1.4 0.000111282715 0.6144 AML other m 2021-11-07T08:46:12.95
IV.TERO.HNN. ML:1.6 0.000159525365 0.96 AML other m 2021-11-07T08:46:15.56
IV.FDMO.HHE. ML:0.6 0.00001574342 0.96 AML other m 2021-11-07T08:46:02.82
IV.FDMO.HHN. ML:0.7 0.000019987619999999996 0.9792 AML other m 2021-11-07T08:46:15.70
IV.CSP1.EHE. ML:1.5 0.00009896306000000001 1.4656 AML other m 2021-11-07T08:46:14.96
IV.CSP1.EHN. ML:1.4 0.00008919964500000001 1.4848 AML other m 2021-11-07T08:46:05.77
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