Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 29-01-2021 and time 01:35:10 (Italy) in region 8 km W Accumoli (RI)

A magnitude ML 0.8 earthquake occured in region: 8 km W Accumoli (RI), on

  • 29-01-2021 00:35:10 (UTC)
  • 29-01-2021 01:35:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7030, 13.1560 at 13 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Cittareale RI 9 482 1149
Norcia PG 11 4957 6106
Cascia PG 12 3217 9323
Amatrice RI 14 2657 11980
Arquata del Tronto AP 14 1178 13158
Monteleone di Spoleto PG 18 599 13757
Poggiodomo PG 18 117 13874

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km NW of L'Aquila (69753 inhabitants)
45 Km E of Terni (111501 inhabitants)
45 Km W of Teramo (54892 inhabitants)
46 Km SE of Foligno (57155 inhabitants)
77 Km SE of Perugia (166134 inhabitants)
84 Km W of Montesilvano (53738 inhabitants)
86 Km NE of Guidonia Montecelio (88673 inhabitants)
87 Km NE of Tivoli (56533 inhabitants)
91 Km W of Pescara (121014 inhabitants)
92 Km W of Chieti (51815 inhabitants)
92 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
Bulletin
Rev1000 		ML 0.8 2021-01-29
00:35:10		 42.7028 13.156 13 2021-07-12
16:54:57		 Bollettino Sismico Italiano INGV 86786301
Reviewed
Rev100 		ML 1.2 2021-01-29
00:35:10		 42.7082 13.1492 11 2021-01-29
00:40:08		 Sala Sismica INGV-Roma 86667111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-29 00:35:10 ± 0.05
Latitude 42.7028 ± 0.0027
Longitude 13.1560 ± 0.0037
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86786301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 297
Semi-minor axis of confidence ellipse (meter) 166
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 52
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 72
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.11511
Epicentral distance of station farthest from the epicenter (degree) 0.49822
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 86786301
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-02 15:18:03

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 86667111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-29 00:40:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASSB.HHN. 2021-01-29T00:35:27.53 0.6 undecidable manual S 313 55.3002 93 0.22 46
IV.MOMA.HNZ. 2021-01-29T00:35:25.92 0.6 undecidable manual S 283 49.0176 93 0.27 46
IV.CESI.HHE. 2021-01-29T00:35:23.04 0.6 undecidable manual S 329 39.2274 94 -0.01 49
IV.TERO.HHZ. 2021-01-29T00:35:22.48 0.3 undecidable manual S 104 37.629 95 -0.13 71
IV.FDMO.HHN. 2021-01-29T00:35:22.77 0.3 undecidable manual S 351 37.4292 95 0.21 71
IV.CAMP.HHZ. 2021-01-29T00:35:20.01 0.6 undecidable manual S 132 27.75 98 0.02 50
IV.ASSB.HHN. 2021-01-29T00:35:20.15 0.1 undecidable manual P 313 55.3002 93 0.11 94
IV.MMO1.EHZ. 2021-01-29T00:35:19.34 0.3 undecidable manual S 32 25.8519 99 -0.15 73
IV.MOMA.HNZ. 2021-01-29T00:35:19.28 0.3 undecidable manual P 283 49.0176 93 0.21 70
IV.GAVE.EHZ. 2021-01-29T00:35:18.14 0.3 undecidable manual S 267 21.3675 103 -0.17 73
IV.RM33.EHZ. 2021-01-29T00:35:18.42 0.3 undecidable manual S 167 22.0668 102 -0.06 74
IV.MC2.EHZ. 2021-01-29T00:35:18.91 0.6 undecidable manual S 7 23.2545 101 0.09 50
IV.FDMO.HHN. 2021-01-29T00:35:17.25 0.1 undecidable manual P 351 37.4292 95 -0.04 97
IV.CESI.HHE. 2021-01-29T00:35:17.28 0.1 undecidable manual P 329 39.2274 94 -0.29 92
IV.TERO.HHZ. 2021-01-29T00:35:17.47 0.3 undecidable manual P 104 37.629 95 0.15 72
IV.LNSS.HHZ. 2021-01-29T00:35:16.48 0.3 undecidable manual S 220 14.5743 116 -0.11 75
IV.T1299.EHZ. 2021-01-29T00:35:16.25 0.3 undecidable manual S 126 12.7761 122 0.07 76
IV.SMA1.EHZ. 2021-01-29T00:35:16.87 0.3 undecidable manual S 119 16.6722 111 -0.24 72
IV.NRCA.HNZ. 2021-01-29T00:35:16.17 0.3 undecidable manual S 347 14.874 115 -0.5 69
IV.ARRO.EHZ. 2021-01-29T00:35:16.77 0.1 undecidable manual P 247 34.6431 95 -0.1 96
IV.MC2.EHZ. 2021-01-29T00:35:15.43 0.3 undecidable manual P 7 23.2545 101 0.3 71
IV.MMO1.EHZ. 2021-01-29T00:35:15.52 0.1 undecidable manual P 32 25.8519 99 0 100
IV.CAMP.HHZ. 2021-01-29T00:35:15.70 0.1 undecidable manual P 132 27.75 98 -0.11 97
IV.RM33.EHZ. 2021-01-29T00:35:14.86 0.3 undecidable manual P 167 22.0668 102 -0.08 74
IV.SMA1.EHZ. 2021-01-29T00:35:14.38 0.3 undecidable manual P 119 16.6722 111 0.24 73
IV.GAVE.EHZ. 2021-01-29T00:35:14.81 0.3 undecidable manual P 267 21.3675 103 -0.03 75
IV.LNSS.HHZ. 2021-01-29T00:35:13.95 0.3 undecidable manual P 220 14.5743 116 0.11 76
IV.T1299.EHZ. 2021-01-29T00:35:13.81 0.1 undecidable manual P 126 12.7761 122 0.2 99
IV.NRCA.HNZ. 2021-01-29T00:35:13.85 0.3 undecidable manual P 347 14.874 115 -0.04 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHN. ML:0.8 0.000054393745 1.22 AML other m 2021-01-29T00:35:16.66
IV.LNSS.HHE. ML:1.1 0.000115100645 0.26 AML other m 2021-01-29T00:35:16.82
IV.SMA1.EHN. ML:0.8 0.000045873625 1.82 AML other m 2021-01-29T00:35:17.31
IV.SMA1.EHE. ML:0.8 0.000044669795 0.36 AML other m 2021-01-29T00:35:17.50
IV.GAVE.EHN. ML:0.7 0.000035218185 0.6 AML other m 2021-01-29T00:35:18.12
IV.GAVE.EHE. ML:0.8 0.000042085715 2.08 AML other m 2021-01-29T00:35:17.38
IV.RM33.EHE. ML:0.8 0.00003278779 0.56 AML other m 2021-01-29T00:35:18.94
IV.RM33.EHN. ML:0.6 0.000024079099999999998 1.66 AML other m 2021-01-29T00:35:18.90
IV.TERO.HHE. ML:0.7 0.000022298495000000003 0.74 AML other m 2021-01-29T00:35:22.69
IV.TERO.HHN. ML:0.9 0.000029448185 0.46 AML other m 2021-01-29T00:35:22.90
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