Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 16-01-2021 and time 01:26:57 (Italy) in region 7 km W Accumoli (RI)

A magnitude ML 1.9 earthquake occured in region: 7 km W Accumoli (RI), on

  • 16-01-2021 00:26:57 (UTC)
  • 16-01-2021 01:26:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7050, 13.1580 at 10 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 10 482 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)
88 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 1.9 2021-01-16
00:26:57		 42.7052 13.1583 11 2021-07-12
16:54:56		 Bollettino Sismico Italiano INGV 86728301
Reviewed
Rev100 		ML 2.0 2021-01-16
00:26:57		 42.7057 13.1632 11 2021-01-16
00:35:32		 Sala Sismica INGV-Roma 86286701
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-16 00:26:57 ± 0.06
Latitude 42.7052 ± 0.0027
Longitude 13.1583 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86728301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 438
Semi-minor axis of confidence ellipse (meter) 229
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 255
Circular confidence region, given by single value of horizontal uncertainty (meter) 440.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 81
Number of associated phases, regardless of their use for origin computation 47
Number of defining phases 44
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.62503
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 86286701
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-16 00:35:32

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 50
Type of magnitude ML
Reference to an origin 86728301
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-31 01:35:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PTRJ.HHZ. 2021-01-16T00:27:47.97 3.0 undecidable manual Sn 0.16 0
IV.VIVA.HHZ. 2021-01-16T00:27:26.74 3.0 undecidable manual S -4.11 0
IV.VIVA.HHZ. 2021-01-16T00:27:14.24 3.0 negative manual P -1.69 0
IV.SAP2.EHZ. 2021-01-16T00:27:13.59 0.3 undecidable manual S 24 47.619 50 1.25 46
IV.FIAM.HHZ. 2021-01-16T00:27:12.74 0.3 undecidable manual S 184 48.618 50 0.14 69
IV.PF6.EHN. 2021-01-16T00:27:12.42 0.3 undecidable manual S 3 48.1185 50 -0.04 70
IV.GUMA.HHZ. 2021-01-16T00:27:11.72 0.3 undecidable manual S 20 42.2244 50 0.84 56
IV.CSP1.EHZ. 2021-01-16T00:27:11.17 0.3 undecidable manual S 5 43.0236 50 0.05 71
MN.AQU.HNN. 2021-01-16T00:27:11.40 0.6 undecidable manual S 153 43.8228 50 0.07 47
IV.CESI.HHZ. 2021-01-16T00:27:10.07 0.1 undecidable manual S 328 39.1275 50 0 96
IV.MF5.EHZ. 2021-01-16T00:27:10.93 0.6 undecidable manual S 38 39.8268 50 0.69 40
IV.TERO.HHZ. 2021-01-16T00:27:09.37 0.3 undecidable manual S 104 37.4292 50 -0.25 68
IV.FDMO.HHZ. 2021-01-16T00:27:09.40 0.1 undecidable manual S 351 37.2294 50 -0.15 93
IV.EL6.EHZ. 2021-01-16T00:27:09.15 0.1 undecidable manual P 356 69.375 50 -0.07 89
IV.MNTT.EHZ. 2021-01-16T00:27:07.54 0.6 undecidable manual P 42 53.2023 50 0.82 37
IV.MMO1.EHZ. 2021-01-16T00:27:06.17 0.3 undecidable manual S 32 25.5522 50 -0.27 70
IV.CAMP.HHZ. 2021-01-16T00:27:06.76 0.3 undecidable manual S 132 27.75 50 -0.28 69
IV.SAP2.EHZ. 2021-01-16T00:27:06.23 0.6 undecidable manual P 24 47.619 50 0.37 44
IV.CSP1.EHZ. 2021-01-16T00:27:05.03 0.1 undecidable manual P 5 43.0236 50 -0.13 93
IV.RM33.EHZ. 2021-01-16T00:27:05.51 0.3 undecidable manual S 168 22.2555 115 -0.04 74
MN.AQU.HNN. 2021-01-16T00:27:05.27 0.6 undecidable manual P 153 43.8228 50 -0.01 47
IV.MC2.EHZ. 2021-01-16T00:27:05.76 0.3 undecidable manual S 6 23.0547 50 0 74
IV.GUMA.HHZ. 2021-01-16T00:27:05.24 0.1 undecidable manual P 20 42.2244 50 0.22 91
IV.FIAM.HHZ. 2021-01-16T00:27:05.85 0.1 undecidable manual P 184 48.618 50 -0.16 91
IV.PF6.EHN. 2021-01-16T00:27:05.73 0.1 undecidable manual P 3 48.1185 50 -0.2 91
IV.GIGS.HHN. 2021-01-16T00:27:04.53 0.6 undecidable manual P 129 43.9227 50 -0.76 39
IV.FDMO.HHZ. 2021-01-16T00:27:04.03 0.1 undecidable manual P 351 37.2294 50 -0.23 92
IV.TERO.HHZ. 2021-01-16T00:27:04.07 0.3 undecidable manual P 104 37.4292 50 -0.23 69
IV.CESI.HHZ. 2021-01-16T00:27:04.43 0.1 undecidable manual P 328 39.1275 50 -0.12 94
IV.MF5.EHZ. 2021-01-16T00:27:04.97 0.3 undecidable manual P 38 39.8268 50 0.31 67
IV.MTRA.HNZ. 2021-01-16T00:27:04.45 0.1 undecidable manual S 74 20.2686 117 -0.47 90
IV.T1299.HNN. 2021-01-16T00:27:03.04 0.3 undecidable manual S 128 12.7761 129 0.28 71
IT.MTCL.HGZ. 2021-01-16T00:27:03.57 0.3 undecidable manual P 338 34.5432 50 -0.28 69
IV.LNSS.HHZ. 2021-01-16T00:27:03.61 0.1 undecidable manual S 220 14.874 125 0.28 95
IV.ARRO.EHZ. 2021-01-16T00:27:03.78 0.1 undecidable manual P 247 34.9428 50 -0.13 94
IV.SMA1.EHZ. 2021-01-16T00:27:03.99 0.3 undecidable manual S 120 16.6722 122 0.15 73
IV.FEMA.HNE. 2021-01-16T00:27:03.17 0.6 undecidable manual P 343 29.8479 50 0.05 48
IV.MMO1.EHZ. 2021-01-16T00:27:02.25 0.1 undecidable manual P 32 25.5522 50 -0.21 94
IV.NRCA.HNZ. 2021-01-16T00:27:02.95 0.1 undecidable manual S 346 14.6742 125 -0.33 94
IV.CAMP.HHZ. 2021-01-16T00:27:02.72 0.1 undecidable manual P 132 27.75 50 -0.08 96
IV.MC2.EHZ. 2021-01-16T00:27:02.04 0.1 undecidable manual P 6 23.0547 50 -0.03 98
IV.SMA1.EHZ. 2021-01-16T00:27:01.13 0.1 undecidable manual P 120 16.6722 122 0.17 96
IV.MTRA.HNZ. 2021-01-16T00:27:01.43 0.1 undecidable manual P 74 20.2686 117 -0.16 96
IV.RM33.EHZ. 2021-01-16T00:27:01.85 0.1 undecidable manual P 168 22.2555 115 -0.1 97
IV.T1299.HNN. 2021-01-16T00:27:00.65 0.1 undecidable manual P 128 12.7761 129 0.32 94
IV.NRCA.HNZ. 2021-01-16T00:27:00.63 0.1 undecidable manual P 346 14.6742 125 0 100
IV.LNSS.HHZ. 2021-01-16T00:27:00.90 0.1 undecidable manual P 220 14.874 125 0.23 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:2.3 0.0019824104999999997 0.14 AML other m 2021-01-16T00:27:03.12
IV.NRCA.HHE. ML:2.3 0.0019879305 0.14 AML other m 2021-01-16T00:27:03.12
IV.LNSS.HHE. ML:2.2 0.0015940957 0.16 AML other m 2021-01-16T00:27:03.70
IV.LNSS.HNE. ML:2.3 0.0019399999999999999 0.3 AML other m 2021-01-16T00:27:03.70
IV.LNSS.HHN. ML:2.4 0.002405338 0.28 AML other m 2021-01-16T00:27:03.99
IV.LNSS.HNN. ML:2.4 0.0021149999999999997 0.26 AML other m 2021-01-16T00:27:03.99
IV.NRCA.HHN. ML:2.3 0.002065 0.8 AML other m 2021-01-16T00:27:04.40
IV.NRCA.HNN. ML:2.3 0.0019161099999999997 0.11 AML other m 2021-01-16T00:27:03.40
IV.SMA1.EHE. ML:1.8 0.000493468 0.2 AML other m 2021-01-16T00:27:04.53
IV.SMA1.EHN. ML:1.7 0.00045770814999999997 0.18 AML other m 2021-01-16T00:27:04.60
IV.MTRA.EHN. ML:1.8 0.0004213328 0.12 AML other m 2021-01-16T00:27:05.17
IV.MTRA.EHE. ML:2.0 0.0008414983 0.18 AML other m 2021-01-16T00:27:05.09
IV.RM33.EHN. ML:1.6 0.0002929093 0.22 AML other m 2021-01-16T00:27:05.57
IV.RM33.EHE. ML:1.7 0.0003003314 0.18 AML other m 2021-01-16T00:27:07.47
IV.CAMP.HHN. ML:1.3 0.000099413505 0.26 AML other m 2021-01-16T00:27:08.13
IV.CAMP.HHE. ML:1.1 0.000070785075 0.48 AML other m 2021-01-16T00:27:08.35
IV.FDMO.HHN. ML:1.8 0.000255 0.36 AML other m 2021-01-16T00:27:09.94
IV.FDMO.HHE. ML:1.7 0.0001735 0.26 AML other m 2021-01-16T00:27:09.78
IV.TERO.HHN. ML:1.7 0.00020136675 0.08 AML other m 2021-01-16T00:27:09.96
IV.CESI.HHN. ML:1.8 0.000248 0.3 AML other m 2021-01-16T00:27:10.32
IV.TERO.HHE. ML:1.5 0.0001285 0.14 AML other m 2021-01-16T00:27:10.40
IV.ARRO.EHN. ML:1.5 0.0001275 0.72 AML other m 2021-01-16T00:27:11.17
IV.CSP1.EHN. ML:2.1 0.00041927844999999997 0.4 AML other m 2021-01-16T00:27:13.39
IV.MF5.EHE. ML:1.8 0.000237 1.44 AML other m 2021-01-16T00:27:11.77
IV.GUMA.HHN. ML:2.3 0.0006018908 0.26 AML other m 2021-01-16T00:27:13.68
IV.GUMA.HNE. ML:2.3 0.0006995 0.22 AML other m 2021-01-16T00:27:12.05
IV.GUMA.HHE. ML:2.4 0.0007669999999999999 0.28 AML other m 2021-01-16T00:27:12.06
IV.CSP1.EHE. ML:2.3 0.0006092528500000001 0.32 AML other m 2021-01-16T00:27:12.44
IV.CESI.HHE. ML:1.6 0.0001235038 0.18 AML other m 2021-01-16T00:27:12.59
IV.ARRO.EHE. ML:1.5 0.000122 0.18 AML other m 2021-01-16T00:27:12.72
IV.MF5.EHN. ML:1.7 0.00019206665000000002 0.38 AML other m 2021-01-16T00:27:12.05
IV.GUMA.HNN. ML:2.2 0.00050943079 0.2 AML other m 2021-01-16T00:27:12.41
IV.SAP2.EHN. ML:2.6 0.0012097185000000002 0.18 AML other m 2021-01-16T00:27:14.76
IV.SAP2.EHE. ML:1.8 0.0001937729 0.16 AML other m 2021-01-16T00:27:15.54
IV.EL6.EHN. ML:2.0 0.00016299999999999998 0.24 AML other m 2021-01-16T00:27:21.68
IV.EL6.EHE. ML:1.8 0.000100415205 0.18 AML other m 2021-01-16T00:27:23.16
IV.MTRA.HNE. ML:2.0 0.0008440060499999999 0.18 AML other m 2021-01-16T00:27:05.09
IV.MTRA.HNN. ML:1.8 0.00043059449999999997 0.13 AML other m 2021-01-16T00:27:05.17
IV.RM33.HNN. ML:1.7 0.00032523945 0.27 AML other m 2021-01-16T00:27:06.70
IV.RM33.HNE. ML:1.6 0.0002920414 0.17 AML other m 2021-01-16T00:27:07.47
IV.TERO.HNN. ML:2.0 0.00033143889999999996 0.51 AML other m 2021-01-16T00:27:16.16
IV.TERO.HNE. ML:2.0 0.000337167765 1.09 AML other m 2021-01-16T00:27:16.17
IV.CESI.HNN. ML:1.9 0.00029014165 0.27 AML other m 2021-01-16T00:27:10.46
IV.CESI.HNE. ML:1.6 0.00015700605 0.35 AML other m 2021-01-16T00:27:11.47
IV.FIAM.HNE. ML:3.0 0.0029537834 1.35 AML other m 2021-01-16T00:27:14.56
IV.FIAM.HHN. ML:1.3 0.000052944215 0.26 AML other m 2021-01-16T00:27:13.93
IV.FIAM.HNN. ML:1.7 0.00013918899 0.28 AML other m 2021-01-16T00:27:13.93
IV.FIAM.HHE. ML:1.4 0.00006850523 0.28 AML other m 2021-01-16T00:27:13.95
IV.MNTT.EHE. ML:2.6 0.00098254625 0.18 AML other m 2021-01-16T00:27:19.15
IV.MNTT.EHN. ML:2.3 0.0005135822 0.18 AML other m 2021-01-16T00:27:19.07
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
Waveforms Seismic signals in miniseed + resp format Download