Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 20-09-2022 and time 07:36:34 (UTC) in region 8 km NW Accumoli (RI)

A magnitude ML 1.2 earthquake occured in region: 8 km NW Accumoli (RI), on

  • 20-09-2022 07:36:34 (UTC)
  • 20-09-2022 09:36:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7420, 13.1800 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
Accumoli RI 8 667 667
Norcia PG 9 4957 5624
Arquata del Tronto AP 10 1178 6802
Cascia PG 14 3217 10019
Cittareale RI 14 482 10501
Amatrice RI 15 2657 13158
Montegallo AP 17 523 13681
Castelsantangelo sul Nera MC 17 281 13962
Acquasanta Terme AP 19 2916 16878
Preci PG 19 724 17602

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km W of Teramo (54892 inhabitants)
46 Km SE of Foligno (57155 inhabitants)
47 Km NW of L'Aquila (69753 inhabitants)
48 Km E of Terni (111501 inhabitants)
76 Km SE of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
90 Km W of Pescara (121014 inhabitants)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
92 Km W of Chieti (51815 inhabitants)
92 Km NE of Tivoli (56533 inhabitants)
95 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 2022-09-20
07:36:34		 42.7423 13.1798 10 2022-09-20
07:43:10		 Sala Sismica INGV-Roma 109919741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-09-20 07:36:34 ± 0.05
Latitude 42.7423 ± 0.0018
Longitude 13.1798 ± 0.0049
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 109919741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 312
Semi-minor axis of confidence ellipse (meter) 243
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 298
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.10342
Epicentral distance of station farthest from the epicenter (degree) 0.34984
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 109919741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-09-20 07:43:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
7F.SIB1.EHZ. 2022-09-20T07:36:41.52 0.3 undecidable manual S 23 18.3705 117 -0.04 74
IV.TERO.HHZ. 2022-09-20T07:36:41.66 0.6 undecidable manual P 111 37.0296 50 -0.04 48
IV.MC2.EHZ. 2022-09-20T07:36:41.92 0.3 undecidable manual S 2 18.7701 117 0.25 71
IV.CSP1.EHZ. 2022-09-20T07:36:41.91 1.0 undecidable manual P 3 38.8278 50 -0.06 24
IV.LNSS.HHZ. 2022-09-20T07:36:41.85 0.1 undecidable manual S 216 19.1697 116 0.04 99
IV.FDMO.HHZ. 2022-09-20T07:36:41.11 1.0 negative manual P 347 33.4443 50 -0.04 24
IV.NRCA.HHZ. 2022-09-20T07:36:39.34 0.1 undecidable manual S 332 11.4774 130 -0.19 97
IV.GAVE.EHZ. 2022-09-20T07:36:39.47 0.3 undecidable manual P 257 23.9538 112 -0.06 73
IV.LNSS.HHZ. 2022-09-20T07:36:38.70 0.1 undecidable manual P 216 19.1697 116 0.03 99
7F.SIB3.EHZ. 2022-09-20T07:36:38.02 0.6 undecidable manual P 26 16.4724 120 -0.16 49
7F.SIB1.EHZ. 2022-09-20T07:36:38.54 0.1 undecidable manual P 23 18.3705 117 0.02 100
IV.MTRA.HNZ. 2022-09-20T07:36:38.37 0.3 undecidable manual P 85 17.7711 118 -0.03 75
IV.MC2.EHZ. 2022-09-20T07:36:38.71 0.1 undecidable manual P 2 18.7701 117 0.13 97
7F.SIB2.EHZ. 2022-09-20T07:36:38.50 1.0 undecidable manual P 31 19.3695 116 -0.19 24
IV.NRCA.HHZ. 2022-09-20T07:36:37.40 0.1 positive manual P 332 11.4774 130 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.2 0.00017549999999999998 0.12 AML other m 2022-09-20T07:36:39.53
IV.NRCA.HHN. ML:1.0 0.00011467454999999999 0.096 AML other m 2022-09-20T07:36:41.96
IV.LNSS.HHE. ML:1.4 0.00020700000000000002 0.18 AML other m 2022-09-20T07:36:42.09
IV.LNSS.HHN. ML:1.3 0.00014850000000000003 0.12 AML other m 2022-09-20T07:36:42.20
IV.GAVE.EHN. ML:0.9 0.00005052562 0.32 AML other m 2022-09-20T07:36:44.38
IV.GAVE.EHE. ML:1.0 0.000052900000000000005 0.14 AML other m 2022-09-20T07:36:44.65
IV.NRCA.HNE. ML:1.2 0.0001693509 0.16 AML other m 2022-09-20T07:36:40.20
IV.NRCA.HNN. ML:1.3 0.00022311940000000003 0.7296 AML other m 2022-09-20T07:36:40.58
IV.MC2.EHE. ML:1.0 0.00007865912 0.16 AML other m 2022-09-20T07:36:42.75
IV.MC2.EHN. ML:1.2 0.00011481145000000001 0.16 AML other m 2022-09-20T07:36:42.52
IV.CSP1.EHE. ML:1.5 0.0001193934 8.384 AML other m 2022-09-20T07:36:56.73
IV.CSP1.EHN. ML:1.3 0.00006721063499999999 0.2432 AML other m 2022-09-20T07:36:49.02
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