Earthquake with magnitude of ML 1.0 on date 24-09-2023 and time 20:20:03 (UTC) in region 2 km NW Accumoli (RI)

A magnitude ML 1.0 earthquake occured in region: 2 km NW Accumoli (RI), on

  • 24-09-2023 20:20:03 (UTC)
  • 24-09-2023 22:20:03 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7140, 13.2340 at 12 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.

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 2 667 667
Arquata del Tronto AP 8 1178 1845
Amatrice RI 10 2657 4502
Cittareale RI 12 482 4984
Norcia PG 15 4957 9941
Acquasanta Terme AP 16 2916 12857
Montegallo AP 17 523 13380
Cascia PG 18 3217 16597

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km W of Teramo (54892 inhabitants)
43 Km NW of L'Aquila (69753 inhabitants)
51 Km SE of Foligno (57155 inhabitants)
51 Km E of Terni (111501 inhabitants)
78 Km W of Montesilvano (53738 inhabitants)
82 Km SE of Perugia (166134 inhabitants)
85 Km W of Pescara (121014 inhabitants)
87 Km W of Chieti (51815 inhabitants)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
91 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 1.0 2023-09-24
20:20:03
42.7142 13.2343 12 2023-09-24
20:25:55
Sala Sismica INGV-Roma 121429371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-24 20:20:03 ± 0.07
Latitude 42.7142 ± 0.0027
Longitude 13.2343 ± 0.0049
Depth (km) 12 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121429371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 418
Semi-minor axis of confidence ellipse (meter) 143
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 98
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 92
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 21
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) 0.28688
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 121429371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-24 20:25:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MGR.HNZ. 2023-09-24T20:20:57.97 3.0 negative manual Pg 6.98 0
IV.SFI.EHZ. 2023-09-24T20:20:52.86 3.0 undecidable manual Sg -0.08 0
IV.IOCA.HHZ. 2023-09-24T20:20:37.94 3.0 undecidable manual Pg 1.31 0
IV.INTR.HHZ. 2023-09-24T20:20:31.00 3.0 undecidable manual S -0.95 0
IV.ARVD.HHZ. 2023-09-24T20:20:17.97 3.0 positive manual P -1.2 0
IV.INTR.HHZ. 2023-09-24T20:20:17.21 3.0 undecidable manual P -1.96 0
IV.TERO.HHZ. 2023-09-24T20:20:13.88 0.6 undecidable manual S 108 31.8459 91 -0.07 48
IV.MC2.EHZ. 2023-09-24T20:20:11.80 0.6 undecidable manual S 350 22.1556 92 0.41 46
IV.MMO1.EHZ. 2023-09-24T20:20:11.46 0.6 undecidable manual S 20 21.867 93 0.15 49
IV.LNSS.HNE. 2023-09-24T20:20:11.21 0.6 undecidable manual S 232 20.0688 93 0.38 47
IV.RM33.EHZ. 2023-09-24T20:20:11.51 0.6 undecidable manual S 184 22.8549 92 -0.05 49
7F.SIB3.EHZ. 2023-09-24T20:20:10.32 0.6 undecidable manual S 9 18.0708 95 0.02 50
7F.SIB2.EHZ. 2023-09-24T20:20:10.86 0.6 undecidable manual S 16 20.4684 93 -0.06 49
IV.NRCA.HHZ. 2023-09-24T20:20:09.66 0.6 undecidable manual S 324 16.4724 97 -0.21 48
IV.MTRA.HNZ. 2023-09-24T20:20:09.01 0.3 undecidable manual S 70 14.0748 104 -0.22 73
IV.TERO.HHZ. 2023-09-24T20:20:09.07 1.0 undecidable manual P 108 31.8459 91 -0.26 23
IV.SMA1.EHZ. 2023-09-24T20:20:08.79 0.3 undecidable manual S 138 12.3765 111 -0.02 76
IV.MMO1.EHZ. 2023-09-24T20:20:07.76 0.6 undecidable manual P 20 21.867 93 -0.04 49
7F.SIB1.EHZ. 2023-09-24T20:20:07.60 0.1 undecidable manual P 8 20.2686 93 0.05 100
IV.LNSS.HNE. 2023-09-24T20:20:07.32 0.1 undecidable manual P 232 20.0688 93 -0.2 95
IV.RM33.EHZ. 2023-09-24T20:20:07.92 1.0 undecidable manual P 184 22.8549 92 -0.02 25
IV.MC2.EHZ. 2023-09-24T20:20:07.64 0.1 undecidable manual P 350 22.1556 92 -0.21 95
7F.SIB3.EHZ. 2023-09-24T20:20:07.17 0.1 undecidable manual P 9 18.0708 95 -0.04 99
IV.MTRA.HNZ. 2023-09-24T20:20:07.07 0.1 undecidable manual P 70 14.0748 104 0.47 92
7F.SIB2.EHZ. 2023-09-24T20:20:07.38 0.1 undecidable manual P 16 20.4684 93 -0.19 96
IV.SMA1.EHZ. 2023-09-24T20:20:06.42 0.3 negative manual P 138 12.3765 111 0.06 75
IV.NRCA.HHZ. 2023-09-24T20:20:06.97 0.1 positive manual P 324 16.4724 97 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.1 0.0001081 0.06 AML other m 2023-09-24T20:20:09.72
IV.NRCA.HHE. ML:1.3 0.00017 0.08 AML other m 2023-09-24T20:20:09.85
IV.SMA1.EHE. ML:0.5 0.00003379193 1.8432 AML other m 2023-09-24T20:20:09.47
IV.SMA1.EHN. ML:0.7 0.000055920129999999995 2.1632 AML other m 2023-09-24T20:20:08.35
IV.MMO1.EHE. ML:1.1 0.000084236985 2.7776 AML other m 2023-09-24T20:20:13.93
IV.MMO1.EHN. ML:1.2 0.000102203545 2.7392 AML other m 2023-09-24T20:20:12.81
IV.RM33.EHE. ML:0.7 0.000030068645000000002 0.2048 AML other m 2023-09-24T20:20:12.87
IV.RM33.EHN. ML:1.0 0.000058433730000000005 3.136 AML other m 2023-09-24T20:20:16.55
IV.TERO.HHE. ML:1.2 0.0000678376 2.1632 AML other m 2023-09-24T20:20:24.95
IV.TERO.HHN. ML:1.3 0.00007814751999999999 1.4848 AML other m 2023-09-24T20:20:08.81
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