Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 23-09-2022 and time 11:43:00 (UTC) in region 6 km NW Accumoli (RI)

A magnitude ML 1.1 earthquake occured in region: 6 km NW Accumoli (RI), on

  • 23-09-2022 11:43:00 (UTC)
  • 23-09-2022 13:43:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7360, 13.1930 at 9 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 6 667 667
Arquata del Tronto AP 10 1178 1845
Norcia PG 10 4957 6802
Cittareale RI 13 482 7284
Amatrice RI 14 2657 9941
Cascia PG 15 3217 13158
Montegallo AP 17 523 13681
Castelsantangelo sul Nera MC 18 281 13962
Acquasanta Terme AP 18 2916 16878

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km W of Teramo (54892 inhabitants)
46 Km NW of L'Aquila (69753 inhabitants)
47 Km SE of Foligno (57155 inhabitants)
49 Km E of Terni (111501 inhabitants)
77 Km SE of Perugia (166134 inhabitants)
82 Km W of Montesilvano (53738 inhabitants)
89 Km W of Pescara (121014 inhabitants)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
91 Km W of Chieti (51815 inhabitants)
92 Km NE of Tivoli (56533 inhabitants)
96 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 1.1 2022-09-23
11:43:00		 42.7358 13.1928 9 2022-09-23
11:47:06		 Sala Sismica INGV-Roma 110051581
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-09-23 11:43:00 ± 0.05
Latitude 42.7358 ± 0.0027
Longitude 13.1928 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 110051581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 298
Semi-minor axis of confidence ellipse (meter) 108
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 107
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 29
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) 0.35613
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 16
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 110051581
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-09-23 11:47:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2022-09-23T11:43:21.70 3.0 undecidable manual S 0.29 0
IV.EL6.EHZ. 2022-09-23T11:43:16.66 3.0 undecidable manual P 0
IV.CSP1.EHZ. 2022-09-23T11:43:13.73 0.6 undecidable manual S 1 39.5271 50 0.15 47
IV.TERO.HHZ. 2022-09-23T11:43:12.50 0.6 undecidable manual S 110 35.8419 50 -0.09 48
IV.FDMO.HHZ. 2022-09-23T11:43:11.99 0.6 undecidable manual S 346 34.4433 50 -0.24 46
IV.FEMA.HNZ. 2022-09-23T11:43:10.05 0.6 undecidable manual S 335 27.6501 108 -0.16 48
IV.GAVE.EHZ. 2022-09-23T11:43:09.31 0.6 undecidable manual S 259 24.8529 110 0.03 49
IV.RM33.EHZ. 2022-09-23T11:43:09.56 0.6 undecidable manual S 176 25.2525 110 0.14 48
IV.MMO1.HNZ. 2022-09-23T11:43:08.30 0.6 undecidable manual S 31 21.1677 113 0.2 48
IV.CESI.HHZ. 2022-09-23T11:43:07.41 0.6 positive manual P 322 37.9287 50 -0.24 46
IV.LNSS.HHZ. 2022-09-23T11:43:07.81 0.6 undecidable manual S 220 19.2696 115 0.3 47
7F.SIB1.EHZ. 2022-09-23T11:43:07.55 0.6 undecidable manual S 20 18.6702 116 0.23 48
IV.CSP1.EHZ. 2022-09-23T11:43:07.70 0.6 positive manual P 1 39.5271 50 -0.19 46
IV.TERO.HHZ. 2022-09-23T11:43:07.25 0.6 positive manual P 110 35.8419 50 -0.07 48
7F.SIB2.EHZ. 2022-09-23T11:43:07.47 0.6 undecidable manual S 28 19.4694 115 -0.09 49
IV.MC2.EHZ. 2022-09-23T11:43:07.81 0.6 undecidable manual S 359 19.4694 115 0.24 48
IV.MF5.EHZ. 2022-09-23T11:43:07.79 0.1 undecidable manual P 38 35.3424 50 0.53 86
IV.MTRA.HNZ. 2022-09-23T11:43:06.68 0.6 undecidable manual S 82 16.7721 118 -0.04 50
IV.FDMO.HHZ. 2022-09-23T11:43:06.69 1.0 negative manual P 346 34.4433 50 -0.42 22
IV.FEMA.HNZ. 2022-09-23T11:43:06.14 0.1 undecidable manual P 335 27.6501 108 0.19 95
IV.GAVE.EHZ. 2022-09-23T11:43:05.39 0.1 negative manual P 259 24.8529 110 -0.02 99
IV.NRCA.HHZ. 2022-09-23T11:43:05.22 0.6 undecidable manual S 329 12.5763 126 -0.27 48
IV.RM33.EHZ. 2022-09-23T11:43:05.46 0.6 undecidable manual P 176 25.2525 110 -0.03 49
IV.MMO1.HNZ. 2022-09-23T11:43:04.64 0.1 undecidable manual P 31 21.1677 113 -0.09 98
7F.SIB2.EHZ. 2022-09-23T11:43:04.21 0.1 undecidable manual P 28 19.4694 115 -0.2 96
IV.MC2.EHZ. 2022-09-23T11:43:04.34 1.0 positive manual P 359 19.4694 115 -0.08 25
IV.MTRA.HNZ. 2022-09-23T11:43:04.08 0.1 undecidable manual P 82 16.7721 118 0.15 97
IV.LNSS.HHZ. 2022-09-23T11:43:04.48 0.1 positive manual P 220 19.2696 115 0.09 98
7F.SIB1.EHZ. 2022-09-23T11:43:04.28 0.1 undecidable manual P 20 18.6702 116 0 100
IV.NRCA.HHZ. 2022-09-23T11:43:03.16 0.1 positive manual P 329 12.5763 126 -0.06 100
IV.SMA1.EHZ. 2022-09-23T11:43:03.49 0.1 undecidable manual P 135 16.4724 119 -0.4 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.3 0.0002175 0.4 AML other m 2022-09-23T11:43:05.20
IV.NRCA.HHE. ML:1.4 0.000257 0.46 AML other m 2022-09-23T11:43:06.82
IV.LNSS.HHE. ML:1.6 0.00031 0.18 AML other m 2022-09-23T11:43:07.84
IV.LNSS.HHN. ML:1.5 0.0002465 0.14 AML other m 2022-09-23T11:43:07.89
IV.RM33.EHE. ML:1.0 0.00005955 0.56 AML other m 2022-09-23T11:43:09.23
IV.GAVE.EHN. ML:1.1 0.0000765 0.76 AML other m 2022-09-23T11:43:09.52
IV.RM33.EHN. ML:0.9 0.00004875 0.84 AML other m 2022-09-23T11:43:10.20
IV.SMA1.EHE. ML:0.8 0.0000659 0.42 AML other m 2022-09-23T11:43:10.54
IV.SMA1.EHN. ML:0.8 0.00005855000000000001 0.3 AML other m 2022-09-23T11:43:10.64
IV.GAVE.EHE. ML:1.1 0.00007965 1.26 AML other m 2022-09-23T11:43:10.23
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