Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 07-10-2023 and time 04:58:54 (Italy) in region 4 km NW Amatrice (RI)

A magnitude ML 1.0 earthquake occured in region: 4 km NW Amatrice (RI), on

  • 07-10-2023 02:58:54 (UTC)
  • 07-10-2023 04:58:54 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6640, 13.2730 at 13 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
Amatrice RI 4 2657 2657
Accumoli RI 4 667 3324
Cittareale RI 11 482 3806
Arquata del Tronto AP 12 1178 4984
Campotosto AQ 14 542 5526
Montereale AQ 16 2581 8107
Capitignano AQ 16 665 8772
Acquasanta Terme AP 16 2916 11688
Cortino TE 20 656 12344

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km W of Teramo (54892 inhabitants)
36 Km N of L'Aquila (69753 inhabitants)
52 Km E of Terni (111501 inhabitants)
57 Km SE of Foligno (57155 inhabitants)
74 Km W of Montesilvano (53738 inhabitants)
80 Km W of Pescara (121014 inhabitants)
81 Km W of Chieti (51815 inhabitants)
86 Km NE of Guidonia Montecelio (88673 inhabitants)
87 Km NE of Tivoli (56533 inhabitants)
87 Km SE of Perugia (166134 inhabitants)
99 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 2023-10-07
02:58:54		 42.6642 13.2727 13 2023-10-07
03:18:32		 Sala Sismica INGV-Roma 121829471
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-07 02:58:54 ± 0.13
Latitude 42.6642 ± 0.0054
Longitude 13.2727 ± 0.0098
Depth (km) 13 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121829471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 777
Semi-minor axis of confidence ellipse (meter) 204
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 258
Circular confidence region, given by single value of horizontal uncertainty (meter) 780.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 78
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.05666
Epicentral distance of station farthest from the epicenter (degree) 0.24731
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 121829471
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-10-07 03:18:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2023-10-07T02:59:04.20 0.6 undecidable manual S 100 27.4503 97 0.04 48
IV.LNSS.HHZ. 2023-10-07T02:59:02.13 0.6 undecidable manual S 250 20.1687 104 -0.12 48
IV.NRCA.HHZ. 2023-10-07T02:59:02.57 0.6 undecidable manual S 326 22.755 100 -0.37 45
IV.RM33.EHZ. 2023-10-07T02:59:01.60 0.3 undecidable manual S 195 17.871 107 -0.06 74
IV.TERO.HHZ. 2023-10-07T02:59:00.38 1.0 undecidable manual P 100 27.4503 97 0.36 23
IV.SMA1.EHZ. 2023-10-07T02:58:59.21 0.6 undecidable manual S 126 6.2937 147 0.03 50
IV.NRCA.HHZ. 2023-10-07T02:58:59.57 0.6 undecidable manual P 326 22.755 100 0.26 48
IV.LNSS.HHZ. 2023-10-07T02:58:59.04 0.1 undecidable manual P 250 20.1687 104 0.13 98
IV.MTRA.EHE. 2023-10-07T02:58:58.11 0.1 undecidable manual P 44 14.3745 116 0.03 100
IV.RM33.EHZ. 2023-10-07T02:58:58.75 0.1 undecidable manual P 195 17.871 107 0.18 97
IV.CAMP.HHN. 2023-10-07T02:58:58.07 0.3 undecidable manual P 142 18.0708 107 -0.54 67
IV.SMA1.EHZ. 2023-10-07T02:58:57.58 1.0 undecidable manual P 126 6.2937 147 0.44 23
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:1.2 0.0001985 0.44 AML other m 2023-10-07T02:58:59.54
IV.SMA1.EHE. ML:1.4 0.000317 0.2 AML other m 2023-10-07T02:58:59.95
IV.RM33.EHN. ML:0.6 0.00003105 0.32 AML other m 2023-10-07T02:59:01.64
IV.RM33.EHE. ML:0.7 0.000040050000000000004 1.18 AML other m 2023-10-07T02:59:01.07
IV.NRCA.HHE. ML:1.1 0.00007494999999999999 0.1 AML other m 2023-10-07T02:59:03.32
IV.NRCA.HHN. ML:0.8 0.00003905 0.86 AML other m 2023-10-07T02:59:03.82
IV.TERO.HHN. ML:1.1 0.0000659 0.08 AML other m 2023-10-07T02:59:04.57
IV.TERO.HHE. ML:0.8 0.000036150000000000005 0.06 AML other m 2023-10-07T02:59:04.66
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