Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 02-03-2023 and time 21:36:34 (Italy) in region 2 km SE Accumoli (RI)

A magnitude ML 1.2 earthquake occured in region: 2 km SE Accumoli (RI), on

  • 02-03-2023 20:36:34 (UTC)
  • 02-03-2023 21:36:34 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6780, 13.2580 at 14 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 2 667 667
Amatrice RI 6 2657 3324
Cittareale RI 10 482 3806
Arquata del Tronto AP 11 1178 4984
Acquasanta Terme AP 16 2916 7900
Campotosto AQ 16 542 8442
Montereale AQ 17 2581 11023
Capitignano AQ 18 665 11688
Norcia PG 19 4957 16645
Montegallo AP 19 523 17168

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km W of Teramo (54892 inhabitants)
38 Km NW of L'Aquila (69753 inhabitants)
52 Km E of Terni (111501 inhabitants)
55 Km SE of Foligno (57155 inhabitants)
75 Km W of Montesilvano (53738 inhabitants)
82 Km W of Pescara (121014 inhabitants)
83 Km W of Chieti (51815 inhabitants)
85 Km SE of Perugia (166134 inhabitants)
87 Km NE of Guidonia Montecelio (88673 inhabitants)
88 Km NE of Tivoli (56533 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 1.2 2023-03-02
20:36:34		 42.6777 13.2582 14 2023-03-02
20:42:50		 Sala Sismica INGV-Roma 114947781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-02 20:36:34 ± 0.08
Latitude 42.6777 ± 0.0045
Longitude 13.2582 ± 0.0061
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 114947781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 533
Semi-minor axis of confidence ellipse (meter) 205
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 324
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 13
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.37951
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 114947781
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-02 20:42:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2023-03-02T20:36:56.33 3.0 undecidable manual S -1.62 0
IV.MMO1.EHZ. 2023-03-02T20:36:43.54 0.1 undecidable manual S 13 25.2525 101 0.16 95
IV.TERO.HHZ. 2023-03-02T20:36:43.92 0.1 undecidable manual S 102 28.8489 98 -0.42 89
IV.FDMO.HHZ. 2023-03-02T20:36:42.27 1.0 positive manual P 341 42.1245 95 0.21 23
IV.NRCA.HHZ. 2023-03-02T20:36:41.84 0.1 undecidable manual S 326 20.868 105 -0.41 91
IV.RM33.EHZ. 2023-03-02T20:36:41.66 0.1 undecidable manual S 191 19.0698 108 -0.12 97
IV.LNSS.HHZ. 2023-03-02T20:36:41.90 0.1 undecidable manual S 245 19.5693 107 -0.03 99
IV.TERO.HHZ. 2023-03-02T20:36:40.47 0.6 undecidable manual P 102 28.8489 98 0.44 45
IV.SMA1.EHZ. 2023-03-02T20:36:39.37 0.1 undecidable manual S 130 8.1807 140 0.01 100
IV.MMO1.EHZ. 2023-03-02T20:36:39.58 1.0 undecidable manual P 13 25.2525 101 0.1 24
IV.RM33.EHZ. 2023-03-02T20:36:38.71 0.3 positive manual P 191 19.0698 108 0.16 72
IV.LNSS.HHZ. 2023-03-02T20:36:38.78 0.1 positive manual P 245 19.5693 107 0.15 96
IV.NRCA.HHZ. 2023-03-02T20:36:38.86 0.1 positive manual P 326 20.868 105 0.04 98
IV.SMA1.EHZ. 2023-03-02T20:36:37.22 0.3 negative manual P 130 8.1807 140 0.07 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:0.9 0.00009309999999999999 0.6 AML other m 2023-03-02T20:36:39.46
IV.SMA1.EHE. ML:1.1 0.00014050000000000003 0.6 AML other m 2023-03-02T20:36:40.65
IV.NRCA.HHN. ML:1.4 0.00016299999999999998 0.08 AML other m 2023-03-02T20:36:42.08
IV.NRCA.HHE. ML:1.4 0.000162 1.2 AML other m 2023-03-02T20:36:42.13
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