Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 21-05-2021 and time 08:05:45 (Italy) in region 7 km W Arquata del Tronto (AP)

A magnitude ML 2.1 earthquake occured in region: 7 km W Arquata del Tronto (AP), on

  • 21-05-2021 06:05:45 (UTC)
  • 21-05-2021 08:05:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7970, 13.2150 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
Arquata del Tronto AP 7 1178 1178
Norcia PG 10 4957 6135
Montegallo AP 11 523 6658
Accumoli RI 12 667 7325
Castelsantangelo sul Nera MC 12 281 7606
Montemonaco AP 15 604 8210
Acquasanta Terme AP 16 2916 11126
Preci PG 17 724 11850
Ussita MC 18 444 12294
Visso MC 18 1107 13401
Cascia PG 19 3217 16618
Montefortino FM 19 1178 17796
Amatrice RI 20 2657 20453

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km W of Teramo (54892 inhabitants)
45 Km E of Foligno (57155 inhabitants)
52 Km N of L'Aquila (69753 inhabitants)
53 Km E of Terni (111501 inhabitants)
76 Km E of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
90 Km W of Pescara (121014 inhabitants)
92 Km NW of Chieti (51815 inhabitants)
95 Km S of Ancona (100861 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
99 Km NE of Tivoli (56533 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 2.1 2021-05-21
06:05:45		 42.7967 13.2153 10 2021-12-29
11:12:11		 Bollettino Sismico Italiano INGV 92834571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-21 06:05:45 ± 0.05
Latitude 42.7967 ± 0.0027
Longitude 13.2153 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 92834571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 341
Semi-minor axis of confidence ellipse (meter) 191
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 75
Circular confidence region, given by single value of horizontal uncertainty (meter) 340.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 39
Number of associated phases, regardless of their use for origin computation 63
Number of defining phases 59
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.70147
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 31
Magnitude information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 66
Type of magnitude ML
Reference to an origin 92834571
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-07-16 16:00:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IT.GLNS.HNZ. 2021-05-21T06:06:15.50 3.0 undecidable manual Pg 4.14 0
IV.LRP.EHZ. 2021-05-21T06:06:09.39 3.0 undecidable manual P 3.01 0
IV.MURB.HHZ. 2021-05-21T06:06:08.76 0.3 undecidable manual S 313 76.2681 50 0.75 55
IV.VCEL.EHZ. 2021-05-21T06:06:06.53 0.3 undecidable manual S 131 67.7766 50 0.77 55
IV.CING.HHZ. 2021-05-21T06:06:05.49 0.3 undecidable manual S 359 64.1913 50 0.68 58
IV.MGAB.HHZ. 2021-05-21T06:06:03.07 3.0 negative manual P 2.06 0
IV.CESX.HHZ. 2021-05-21T06:06:02.97 0.3 undecidable manual S 248 55.3002 50 0.54 62
IV.MOMA.HHZ. 2021-05-21T06:06:02.66 0.3 undecidable manual S 271 52.503 50 0.98 52
IV.ASSB.HHZ. 2021-05-21T06:06:01.93 0.3 undecidable manual S 301 52.8027 50 0.17 68
IV.ARRO.EHZ. 2021-05-21T06:05:59.80 0.3 undecidable manual S 237 43.9227 50 0.42 65
IV.MURB.HHZ. 2021-05-21T06:05:58.80 0.6 undecidable manual P 313 76.2681 50 0.5 40
IV.SAP2.EHZ. 2021-05-21T06:05:58.20 0.3 undecidable manual S 24 36.4413 50 0.8 58
IV.T0110.HHZ. 2021-05-21T06:05:58.32 0.6 undecidable manual P 144 77.8665 50 -0.24 43
IV.MML1.HNE. 2021-05-21T06:05:58.17 0.3 undecidable manual S 331 40.3263 50 -0.26 68
IV.PP3.EHZ. 2021-05-21T06:05:58.80 3.0 positive manual P 0.81 0
IV.PF6.EHN. 2021-05-21T06:05:57.35 0.3 undecidable manual S 357 37.9287 50 -0.43 66
IV.VCEL.EHZ. 2021-05-21T06:05:56.97 0.3 undecidable manual P 131 67.7766 50 -0.04 68
IV.RM33.EHZ. 2021-05-21T06:05:56.26 0.3 undecidable manual S 180 31.9458 50 0.08 72
IV.CING.HHZ. 2021-05-21T06:05:56.62 0.6 undecidable manual P 359 64.1913 50 0.16 44
IV.CAMP.HHZ. 2021-05-21T06:05:56.14 0.3 undecidable manual S 151 32.9448 50 -0.32 68
IV.CSP1.EHZ. 2021-05-21T06:05:56.14 0.3 undecidable manual S 359 32.745 50 -0.26 69
IV.CESI.HHZ. 2021-05-21T06:05:56.61 0.3 undecidable manual S 313 34.2435 50 -0.19 70
IV.GUMA.HHZ. 2021-05-21T06:05:56.32 0.3 undecidable manual S 18 31.0467 50 0.36 68
IV.TERO.HHZ. 2021-05-21T06:05:56.95 0.3 undecidable manual S 121 37.1295 50 -0.61 62
IV.GAVE.EHZ. 2021-05-21T06:05:55.09 0.3 undecidable manual S 246 28.6491 50 -0.21 70
IV.MF5.EHZ. 2021-05-21T06:05:55.87 0.3 undecidable manual S 43 29.0487 50 0.45 67
IV.CESX.HHZ. 2021-05-21T06:05:55.08 0.6 undecidable manual P 248 55.3002 50 0 47
IV.MOMA.HHZ. 2021-05-21T06:05:54.57 0.3 undecidable manual P 271 52.503 50 -0.08 69
IV.LNSS.HHZ. 2021-05-21T06:05:54.56 0.3 undecidable manual S 214 25.752 50 0.01 74
IV.ASSB.HHZ. 2021-05-21T06:05:54.28 0.6 undecidable manual P 301 52.8027 50 -0.41 43
IT.MTCL.HGZ. 2021-05-21T06:05:54.61 0.3 undecidable manual S 321 28.0497 50 -0.54 65
IV.FDMO.HHZ. 2021-05-21T06:05:54.72 0.3 undecidable manual S 339 28.5492 50 -0.57 64
IV.OFFI.HHZ. 2021-05-21T06:05:53.40 0.3 undecidable manual P 68 41.2254 50 0.49 65
IV.MNTT.EHZ. 2021-05-21T06:05:53.63 0.3 undecidable manual P 46 42.624 50 0.5 64
IV.ARRO.EHZ. 2021-05-21T06:05:53.07 0.3 undecidable manual P 237 43.9227 50 -0.25 68
IV.FEMA.HNZ. 2021-05-21T06:05:53.30 0.3 undecidable manual S 324 22.755 114 -0.42 68
IV.T1299.HNZ. 2021-05-21T06:05:52.87 0.3 undecidable manual S 163 18.87 119 0.37 69
IV.SMA1.EHZ. 2021-05-21T06:05:52.80 0.3 undecidable manual S 152 20.868 116 -0.33 70
IV.SAP2.EHZ. 2021-05-21T06:05:52.27 0.3 undecidable manual P 24 36.4413 50 0.09 71
IV.MML1.HNE. 2021-05-21T06:05:52.48 0.3 undecidable manual P 331 40.3263 50 -0.29 68
IV.CSP1.EHZ. 2021-05-21T06:05:51.31 0.1 negative manual P 359 32.745 50 -0.29 92
IV.CESI.HHZ. 2021-05-21T06:05:51.61 0.1 undecidable manual P 313 34.2435 50 -0.22 93
IV.GUMA.HHZ. 2021-05-21T06:05:51.38 0.1 negative manual P 18 31.0467 50 0.04 97
IV.TERO.HHZ. 2021-05-21T06:05:51.88 0.1 undecidable manual P 121 37.1295 50 -0.39 89
IV.RM33.EHZ. 2021-05-21T06:05:51.41 0.1 undecidable manual P 180 31.9458 50 -0.06 96
IV.MMO1.EHZ. 2021-05-21T06:05:51.18 0.3 undecidable manual S 39 14.5743 125 -0.06 74
IV.PF6.EHN. 2021-05-21T06:05:51.99 0.3 undecidable manual P 357 37.9287 50 -0.41 66
IV.MF5.EHZ. 2021-05-21T06:05:51.14 0.1 undecidable manual P 43 29.0487 50 0.11 96
IV.CAMP.HHZ. 2021-05-21T06:05:51.39 0.1 undecidable manual P 151 32.9448 50 -0.25 92
IV.MTRA.HNZ. 2021-05-21T06:05:51.31 0.3 undecidable manual S 107 15.3735 124 -0.18 72
IT.MTCL.HGZ. 2021-05-21T06:05:50.55 0.1 undecidable manual P 321 28.0497 50 -0.33 92
IV.FDMO.HHZ. 2021-05-21T06:05:50.62 0.1 negative manual P 339 28.5492 50 -0.34 91
IV.NRCA.HNZ. 2021-05-21T06:05:50.03 0.3 undecidable manual S 296 9.1797 138 0.18 73
IV.GAVE.EHZ. 2021-05-21T06:05:50.90 0.1 undecidable manual P 246 28.6491 50 -0.06 97
IV.MC2.EHZ. 2021-05-21T06:05:50.99 0.3 undecidable manual S 350 12.876 129 0.2 72
IV.LNSS.HHZ. 2021-05-21T06:05:50.48 0.1 undecidable manual P 214 25.752 50 -0.05 97
IV.FEMA.HNZ. 2021-05-21T06:05:49.89 0.3 undecidable manual P 324 22.755 114 -0.16 72
IV.T1299.HNZ. 2021-05-21T06:05:49.56 0.1 undecidable manual P 163 18.87 119 0.21 95
IV.SMA1.EHZ. 2021-05-21T06:05:49.67 0.1 positive manual P 152 20.868 116 -0.04 98
IV.MMO1.EHZ. 2021-05-21T06:05:48.64 0.1 undecidable manual P 39 14.5743 125 0.02 100
IV.MTRA.HNZ. 2021-05-21T06:05:48.80 0.1 undecidable manual P 107 15.3735 124 0.04 99
IV.NRCA.HNZ. 2021-05-21T06:05:48.08 0.1 positive manual P 296 9.1797 138 0.26 96
IV.MC2.EHZ. 2021-05-21T06:05:48.56 0.1 negative manual P 350 12.876 129 0.2 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:3.3 0.02533193 0.0992 AML other m 2021-05-21T06:05:50.20
IV.NRCA.HNE. ML:3.3 0.024550000000000002 0.12 AML other m 2021-05-21T06:05:50.21
IV.NRCA.HHN. ML:3.3 0.023596885 0.1024 AML other m 2021-05-21T06:05:50.20
IV.NRCA.HNN. ML:3.2 0.02098527 0.1024 AML other m 2021-05-21T06:05:50.25
IV.MTRA.HNE. ML:2.5 0.003215 0.1 AML other m 2021-05-21T06:05:51.74
IV.MTRA.EHE. ML:2.6 0.00326609 0.0992 AML other m 2021-05-21T06:05:51.74
IV.MTRA.EHN. ML:2.4 0.0021887355 0.1184 AML other m 2021-05-21T06:05:51.79
IV.MTRA.HNN. ML:2.4 0.002135341 0.1312 AML other m 2021-05-21T06:05:51.79
IV.SMA1.EHE. ML:2.0 0.0006965 0.22 AML other m 2021-05-21T06:05:53.15
IV.SMA1.EHN. ML:1.9 0.0005785 0.1 AML other m 2021-05-21T06:05:53.40
IV.FDMO.HHN. ML:2.0 0.0005315 0.24 AML other m 2021-05-21T06:05:55.12
IV.LNSS.HHN. ML:2.3 0.0011169066000000002 0.1408 AML other m 2021-05-21T06:05:55.09
IV.LNSS.HHE. ML:2.4 0.001425 0.12 AML other m 2021-05-21T06:05:55.31
IV.GAVE.EHN. ML:2.0 0.00046154869999999996 0.1792 AML other m 2021-05-21T06:05:55.67
IV.GAVE.EHE. ML:2.2 0.0008089999999999999 0.22 AML other m 2021-05-21T06:05:56.27
IV.MF5.EHE. ML:2.2 0.0008105 0.36 AML other m 2021-05-21T06:05:56.55
IV.CAMP.HHE. ML:1.8 0.00026070805 0.2208 AML other m 2021-05-21T06:05:56.39
IV.MF5.EHN. ML:1.9 0.00037359815 0.3584 AML other m 2021-05-21T06:05:56.58
IV.GUMA.HHE. ML:2.7 0.002515 0.24 AML other m 2021-05-21T06:05:56.72
IV.FDMO.HHE. ML:1.7 0.00026955115000000003 0.16 AML other m 2021-05-21T06:05:55.28
IV.GUMA.HHN. ML:2.7 0.002415 0.36 AML other m 2021-05-21T06:05:56.77
IV.CESI.HHE. ML:2.0 0.00044775114999999997 0.1792 AML other m 2021-05-21T06:05:57.51
IV.CESI.HHN. ML:2.3 0.0008603972 0.2176 AML other m 2021-05-21T06:05:57.20
IV.RM33.EHN. ML:1.9 0.00033474265 0.1184 AML other m 2021-05-21T06:05:56.68
IV.CSP1.EHE. ML:2.3 0.0008580000000000001 0.38 AML other m 2021-05-21T06:05:57.31
IV.CAMP.HHN. ML:1.6 0.0001760205 0.2592 AML other m 2021-05-21T06:05:56.34
IV.CSP1.EHN. ML:2.3 0.0008810000000000001 0.32 AML other m 2021-05-21T06:05:57.51
IV.RM33.EHE. ML:1.8 0.000315 0.12 AML other m 2021-05-21T06:05:57.94
IV.SAP2.EHE. ML:2.0 0.00038640304999999997 0.16 AML other m 2021-05-21T06:05:59.20
IV.ARRO.EHE. ML:1.8 0.0001945 0.2 AML other m 2021-05-21T06:06:00.26
IV.SAP2.EHN. ML:2.5 0.0013421161000000002 0.1824 AML other m 2021-05-21T06:06:00.52
IV.MNTT.EHN. ML:0.0 0.0012452130000000002 0.2624 AML other m 2021-05-21T06:06:01.24
IV.OFFI.HHN. ML:2.0 0.00033520865 0.1792 AML other m 2021-05-21T06:06:01.55
IV.ARRO.EHN. ML:1.9 0.00023826259999999998 0.24 AML other m 2021-05-21T06:06:02.15
IV.ASSB.HHE. ML:2.0 0.000227 0.2 AML other m 2021-05-21T06:06:02.35
IV.ASSB.HHN. ML:1.9 0.000191 0.2 AML other m 2021-05-21T06:06:02.38
IV.MOMA.HHE. ML:2.1 0.00032713634999999996 0.2208 AML other m 2021-05-21T06:06:03.34
IV.OFFI.HHE. ML:2.2 0.0005465 0.32 AML other m 2021-05-21T06:06:03.27
IV.MNTT.EHE. ML:0.0 0.0017883665 0.1792 AML other m 2021-05-21T06:06:03.59
IV.MOMA.HHN. ML:2.0 0.00022349999999999998 0.24 AML other m 2021-05-21T06:06:04.28
IV.CESX.HHN. ML:1.6 0.00009107342500000001 0.2016 AML other m 2021-05-21T06:06:04.88
IV.CING.HHE. ML:1.7 0.000095 0.44 AML other m 2021-05-21T06:06:06.25
IV.CESX.HHE. ML:1.6 0.00009175 0.36 AML other m 2021-05-21T06:06:06.79
IV.VCEL.EHE. ML:2.1 0.0001985 0.28 AML other m 2021-05-21T06:06:08.28
IV.CING.HHN. ML:1.5 0.00005606153 0.1408 AML other m 2021-05-21T06:06:08.19
IV.VCEL.EHN. ML:2.0 0.0001945722 0.16 AML other m 2021-05-21T06:06:08.25
IV.MURB.HHE. ML:0.0 0.00022357035 0.24 AML other m 2021-05-21T06:06:10.56
IV.T0110.HHE. ML:2.0 0.000128 0.38 AML other m 2021-05-21T06:06:10.55
IV.MURB.HHN. ML:0.0 0.00019323335 0.2784 AML other m 2021-05-21T06:06:11.19
IV.T0110.HHN. ML:1.8 0.00009966761 0.3808 AML other m 2021-05-21T06:06:10.80
IV.LNSS.HNE. ML:2.3 0.0012499005 0.1216 AML other m 2021-05-21T06:05:55.32
IV.LNSS.HNN. ML:2.2 0.0010123650500000001 0.1216 AML other m 2021-05-21T06:05:55.37
IV.GAVE.HNE. ML:2.2 0.0008536732000000001 0.2112 AML other m 2021-05-21T06:05:56.26
IV.GAVE.HNN. ML:1.5 0.00015718812500000002 0.1792 AML other m 2021-05-21T06:05:55.76
IV.RM33.HNN. ML:1.9 0.00034729770000000007 0.1184 AML other m 2021-05-21T06:05:56.69
IV.RM33.HNE. ML:1.8 0.00032077245 0.1312 AML other m 2021-05-21T06:05:57.94
IV.CESI.HNN. ML:2.3 0.0007949062 0.2208 AML other m 2021-05-21T06:05:57.21
IV.CESI.HNE. ML:2.0 0.00039543835000000003 0.1696 AML other m 2021-05-21T06:05:57.51
IV.TERO.HNN. ML:2.2 0.00067132865 0.0896 AML other m 2021-05-21T06:05:57.67
IV.TERO.HHE. ML:2.2 0.0005693411500000001 0.1408 AML other m 2021-05-21T06:05:58.47
IV.TERO.HHN. ML:2.2 0.0006470774 0.0768 AML other m 2021-05-21T06:05:57.66
IV.TERO.HNE. ML:2.2 0.0006868487 0.1312 AML other m 2021-05-21T06:05:58.48
IV.MOMA.HNN. ML:2.0 0.00023485139999999998 0.2592 AML other m 2021-05-21T06:06:04.28
IV.MOMA.HNE. ML:2.1 0.00029555775 0.208 AML other m 2021-05-21T06:06:03.35
IV.MURB.HNN. ML:2.1 0.0001895917 0.3424 AML other m 2021-05-21T06:06:11.36
IV.MURB.HNE. ML:2.2 0.0002310274 0.3296 AML other m 2021-05-21T06:06:14.11
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