Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 01-03-2021 and time 16:04:10 (UTC) in region 9 km W Accumoli (RI)

A magnitude ML 0.8 earthquake occured in region: 9 km W Accumoli (RI), on

  • 01-03-2021 16:04:10 (UTC)
  • 01-03-2021 17:04:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7, 13.14 at 11 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 9 667 667
Cittareale RI 9 482 1149
Cascia PG 11 3217 4366
Norcia PG 12 4957 9323
Amatrice RI 14 2657 11980
Arquata del Tronto AP 15 1178 13158
Monteleone di Spoleto PG 16 599 13757
Poggiodomo PG 17 117 13874
Posta RI 20 694 14568

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Terni (111501 inhabitants)
44 Km NW of L'Aquila (69753 inhabitants)
46 Km W of Teramo (54892 inhabitants)
46 Km SE of Foligno (57155 inhabitants)
77 Km SE of Perugia (166134 inhabitants)
85 Km NE of Guidonia Montecelio (88673 inhabitants)
85 Km W of Montesilvano (53738 inhabitants)
86 Km NE of Tivoli (56533 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
91 Km W of Pescara (121014 inhabitants)
92 Km W of Chieti (51815 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 0.8 2021-03-01
16:04:10		 42.7 13.14 11 2021-03-01
22:40:46		 Sala Sismica INGV-Roma 87611141
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-01 16:04:10 ± 0.05
Latitude 42.70 ± 0.00
Longitude 13.14 ± 0.00
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87611141

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 337
Semi-minor axis of confidence ellipse (meter) 317
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 112
Circular confidence region, given by single value of horizontal uncertainty (meter) 340
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.34624
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 87611141
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-01 22:40:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GIZZ.HHZ. 2021-03-01T16:05:46.37 3.0 undecidable manual Sn 4.35 0
IV.CET2.HHZ. 2021-03-01T16:05:38.54 3.0 undecidable manual Sg 10.63 0
IV.SPS2.HHZ. 2021-03-01T16:05:36.09 3.0 undecidable manual Sn 0.08 0
IV.IST3.HHZ. 2021-03-01T16:05:33.33 3.0 undecidable manual Sn -7.89 0
OX.SABO.HNZ. 2021-03-01T16:05:27.80 3.0 undecidable manual Sn 1.26 0
IV.ESML.HHZ. 2021-03-01T16:05:17.58 3.0 negative manual Pg 6.33 0
IV.FIR.HHZ. 2021-03-01T16:05:17.78 3.0 undecidable manual Sg 12.36 0
RF.GEPF.HHZ. 2021-03-01T16:05:07.68 3.0 positive manual Pg 15.45 0
IV.SPS2.HHZ. 2021-03-01T16:05:05.69 3.0 negative manual Pg 12.85 0
SL.KOGS.BHZ. 2021-03-01T16:05:02.32 3.0 undecidable manual Pn 5.48 0
IV.LADO.EHZ. 2021-03-01T16:04:59.20 3.0 undecidable manual Pn 3.17 0
IV.RIBO.EHZ.01 2021-03-01T16:04:55.12 3.0 undecidable manual Sn -8.58 0
IV.SBPO.HNZ. 2021-03-01T16:04:54.36 3.0 negative manual Pg 6.11 0
IV.TOLF.HHZ. 2021-03-01T16:04:53.48 3.0 undecidable manual Sg 3.97 0
IV.TDS.HHZ. 2021-03-01T16:04:51.18 3.0 undecidable manual Pn 2.88 0
IV.IMOL.HNZ. 2021-03-01T16:04:36.54 3.0 positive manual Pn 0.49 0
IV.FIR.HHZ. 2021-03-01T16:04:27.27 3.0 undecidable manual Pn -8.39 0
IV.TERO.HHZ. 2021-03-01T16:04:22.93 0.3 undecidable manual S 102 0.3462 90 -0.29 68
IV.MMO1.EHN. 2021-03-01T16:04:20.18 0.3 undecidable manual S 33 0.2437 90 0 74
IV.MC2.EHN. 2021-03-01T16:04:19.71 0.3 undecidable manual S 9 0.2176 90 0.29 71
IV.GAVE.EHZ. 2021-03-01T16:04:18.29 0.3 undecidable manual S 269 0.1835 91 -0.11 73
IV.MCI.EHZ. 2021-03-01T16:04:18.39 3.0 positive manual P -1.08 0
IV.RM33.EHZ. 2021-03-01T16:04:18.61 0.3 undecidable manual S 164 0.1943 91 -0.11 72
IV.MTRA.EHN. 2021-03-01T16:04:18.43 0.3 undecidable manual S 72 0.1952 91 -0.32 70
IV.TERO.HHZ. 2021-03-01T16:04:17.74 0.1 undecidable manual P 102 0.3462 90 -0.11 94
IV.SMA1.EHE. 2021-03-01T16:04:17.88 0.3 undecidable manual S 115 0.1556 91 0.31 71
IV.NRCA.HHZ. 2021-03-01T16:04:16.72 0.3 undecidable manual S 351 0.1394 92 -0.37 72
IV.T1299.EHZ. 2021-03-01T16:04:16.53 0.3 undecidable manual S 121 0.1187 100 0.03 75
IV.MMO1.EHN. 2021-03-01T16:04:16.17 0.1 undecidable manual P 33 0.2437 90 0.08 98
IV.MC2.EHN. 2021-03-01T16:04:16.14 0.6 undecidable manual P 9 0.2176 90 0.49 45
IV.LNSS.HHZ. 2021-03-01T16:04:16.43 0.3 undecidable manual S 219 0.1205 100 -0.1 75
IV.MTRA.EHN. 2021-03-01T16:04:15.28 0.1 undecidable manual P 72 0.1952 91 0.01 100
IV.GAVE.EHZ. 2021-03-01T16:04:15.07 0.1 undecidable manual P 269 0.1835 91 0 100
IV.RM33.EHZ. 2021-03-01T16:04:15.33 0.1 undecidable manual P 164 0.1943 91 0.08 100
IV.LNSS.HHZ. 2021-03-01T16:04:14.12 0.1 undecidable manual P 219 0.1205 100 0.13 98
IV.NRCA.HHZ. 2021-03-01T16:04:14.31 0.1 undecidable manual P 351 0.1394 92 0 100
IV.SMA1.EHE. 2021-03-01T16:04:14.89 0.1 undecidable manual P 115 0.1556 91 0.3 95
IV.T1299.EHZ. 2021-03-01T16:04:13.79 0.1 undecidable manual P 121 0.1187 100 -0.18 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHN. ML:0.8 7.155E-5 0.3 AML other m 2021-03-01T16:04:16.79
IV.NRCA.HHN. ML:1 8.005E-5 0.14 AML other m 2021-03-01T16:04:16.88
IV.LNSS.HHE. ML:0.8 6.505E-5 0.7 AML other m 2021-03-01T16:04:16.99
IV.NRCA.HHE. ML:0.9 6.59E-5 0.54 AML other m 2021-03-01T16:04:17.65
IV.FIR.HHN. ML:3.1 0.0004055 0.1 AML other m 2021-03-01T16:05:23.31
IV.FIR.HNN. ML:3.1 0.0004365 0.08 AML other m 2021-03-01T16:05:23.31
IV.FIR.HHE. ML:3.5 0.0009985 0.08 AML other m 2021-03-01T16:05:23.41
IV.FIR.HNE. ML:3.4 0.0009075 0.08 AML other m 2021-03-01T16:05:23.41
IV.IMOL.HNN. ML:3.9 0.00189 0.58 AML other m 2021-03-01T16:05:24.59
IV.IMOL.HNE. ML:3.8 0.001595 0.06 AML other m 2021-03-01T16:05:25.61
OX.SABO.HNN. ML:4.8 0.00442 0.5 AML other m 2021-03-01T16:05:29.57
OX.SABO.HNE. ML:4.8 0.00515 0.5 AML other m 2021-03-01T16:05:29.57
IV.SPS2.HHE. ML:2.9 3.25E-5 0.24 AML other m 2021-03-01T16:05:49.28
IV.SPS2.HHN. ML:2.8 2.665E-5 1.16 AML other m 2021-03-01T16:05:50.41
IV.GAVE.EHE. ML:0.7 3.6366257E-5 0.1792 AML other m 2021-03-01T16:04:19.78
IV.GAVE.EHN. ML:0.7 3.2818371E-5 0.1408 AML other m 2021-03-01T16:04:19.65
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download