Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 21-07-2020 and time 23:41:52 (UTC) in region 7 km NW Accumoli (RI)

A magnitude ML 1.5 earthquake occured in region: 7 km NW Accumoli (RI), on

  • 21-07-2020 23:41:52 (UTC)
  • 22-07-2020 01:41:52 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7400, 13.1840 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 7 667 667
Norcia PG 10 4957 5624
Arquata del Tronto AP 10 1178 6802
Cittareale RI 14 482 7284
Cascia PG 14 3217 10501
Amatrice RI 15 2657 13158
Montegallo AP 17 523 13681
Castelsantangelo sul Nera MC 18 281 13962
Acquasanta Terme AP 19 2916 16878
Preci PG 20 724 17602

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km W of Teramo (54892 inhabitants)
46 Km SE of Foligno (57155 inhabitants)
47 Km NW of L'Aquila (69753 inhabitants)
48 Km E of Terni (111501 inhabitants)
77 Km SE of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
90 Km W of Pescara (121014 inhabitants)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
91 Km W of Chieti (51815 inhabitants)
92 Km NE of Tivoli (56533 inhabitants)
95 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 1.5 2020-07-21
23:41:52		 42.7398 13.1843 10 2020-11-19
12:36:59		 Bollettino Sismico Italiano INGV 82682051
Reviewed
Rev100 		ML 1.5 2020-07-21
23:41:52		 42.7353 13.1935 9 2020-07-21
23:46:51		 Sala Sismica INGV-Roma 81227221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-21 23:41:52 ± 0.05
Latitude 42.7398 ± 0.0027
Longitude 13.1843 ± 0.0037
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 82682051

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 349
Semi-minor axis of confidence ellipse (meter) 115
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 71
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 32
Number of associated phases, regardless of their use for origin computation 55
Number of defining phases 55
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.10702
Epicentral distance of station farthest from the epicenter (degree) 0.92540
Number of stations at which the event was observed 37
Number of stations from which data was used for origin computation 37
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 50
Type of magnitude ML
Reference to an origin 82682051
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-09-06 16:59:58

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 50
Type of magnitude ML
Reference to an origin 81227221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-21 23:46:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PIEI.HHZ. 2020-07-21T23:42:10.35 0.3 undecidable manual P 329 102.7194 50 0.39 59
IV.FRON.EHZ. 2020-07-21T23:42:08.58 0.3 undecidable manual P 337 93.9393 50 -0.03 65
IV.SSFR.HHZ. 2020-07-21T23:42:07.25 0.3 undecidable manual P 337 83.8494 50 0.2 64
IV.GUMA.HHZ. 2020-07-21T23:42:06.00 0.6 undecidable manual S 19 37.8288 50 0.64 41
IV.MURB.HHZ. 2020-07-21T23:42:06.58 0.6 undecidable manual P 318 78.9654 50 0.28 42
IV.CSP1.EHZ. 2020-07-21T23:42:05.75 0.6 undecidable manual S 2 39.1275 50 0.06 48
IV.T0110.HHZ. 2020-07-21T23:42:05.40 0.3 undecidable manual P 139 74.4699 50 -0.21 65
IV.ARRO.EHZ. 2020-07-21T23:42:05.52 0.3 undecidable manual S 243 38.5281 50 -0.01 72
IV.MF5.EHZ. 2020-07-21T23:42:05.52 0.6 undecidable manual S 39 35.4423 50 0.8 39
IV.TERO.HHZ. 2020-07-21T23:42:04.59 0.3 undecidable manual S 111 36.6411 50 -0.43 66
IV.EL6.EHZ. 2020-07-21T23:42:04.20 0.3 undecidable manual P 354 65.7897 50 -0.06 68
IV.CESI.HHZ. 2020-07-21T23:42:04.94 0.6 undecidable manual S 322 37.1295 50 -0.24 46
IV.VCEL.EHZ. 2020-07-21T23:42:04.55 0.3 undecidable manual P 125 65.8896 50 0.26 65
IV.ATCC.EHZ. 2020-07-21T23:42:04.21 0.3 undecidable manual P 318 66.2781 50 -0.13 67
IT.MTCL.HGZ. 2020-07-21T23:42:03.42 0.3 undecidable manual S 332 31.9458 50 -0.36 68
IV.SNTG.HHZ. 2020-07-21T23:42:03.34 0.3 undecidable manual P 341 60.495 50 -0.1 68
IV.CAMP.HHZ. 2020-07-21T23:42:02.59 0.3 undecidable manual S 141 29.1486 50 -0.44 67
IV.ASSB.HHZ. 2020-07-21T23:42:02.40 0.3 undecidable manual P 308 54.3012 50 -0.1 69
IV.FEMA.HNE. 2020-07-21T23:42:02.21 0.3 undecidable manual S 336 26.9508 50 -0.24 70
IV.MNTT.EHZ. 2020-07-21T23:42:02.52 0.6 undecidable manual P 43 48.9177 50 0.85 37
MN.AQU.HNN. 2020-07-21T23:42:02.07 0.1 undecidable manual P 157 46.4202 50 0.78 76
IV.FIAM.HNN. 2020-07-21T23:42:02.33 0.3 undecidable manual P 186 52.6029 50 0.09 69
IV.SAP2.EHE. 2020-07-21T23:42:01.59 0.3 undecidable manual P 24 43.2234 50 0.8 57
IV.MOMA.HHZ. 2020-07-21T23:42:01.97 0.3 undecidable manual P 278 50.5161 50 0.05 70
IV.GAVE.EHZ. 2020-07-21T23:42:01.70 0.3 undecidable manual S 258 24.2535 113 -0.01 74
IV.RM33.EHZ. 2020-07-21T23:42:01.97 0.3 undecidable manual S 174 25.752 50 -0.15 72
IV.OFFI.HHZ. 2020-07-21T23:42:01.95 0.3 undecidable manual P 62 46.2204 50 0.71 59
IV.LNSS.HHZ. 2020-07-21T23:42:00.24 0.3 undecidable manual S 218 19.1697 118 0.11 73
IV.GIGS.HHN. 2020-07-21T23:42:00.42 0.3 undecidable manual P 135 44.9217 50 -0.63 61
IV.MMO1.EHZ. 2020-07-21T23:42:00.38 0.3 undecidable manual S 33 21.1677 116 -0.36 69
IV.CSP1.EHZ. 2020-07-21T23:42:00.01 0.3 undecidable manual P 2 39.1275 50 -0.14 70
IV.ARRO.EHZ. 2020-07-21T23:42:00.23 0.3 undecidable manual P 243 38.5281 50 0.16 70
IV.MML1.HNE. 2020-07-21T23:42:00.90 0.1 undecidable manual P 337 44.9217 50 -0.15 93
IV.MC2.EHZ. 2020-07-21T23:42:00.15 0.3 undecidable manual S 1 19.0698 118 0.06 74
IV.GUMA.HHZ. 2020-07-21T23:42:00.21 0.3 undecidable manual P 19 37.8288 50 0.25 69
IV.PF6.EHN. 2020-07-21T23:42:00.62 0.1 undecidable manual P 1 44.1225 50 -0.32 89
IV.MF5.EHZ. 2020-07-21T23:41:59.87 0.3 undecidable manual P 39 35.4423 50 0.27 69
IV.MTRA.EHZ. 2020-07-21T23:41:59.09 0.6 undecidable manual S 84 17.3715 120 -0.49 45
IV.SMA1.EHZ. 2020-07-21T23:41:59.52 0.3 undecidable manual S 134 17.2716 120 -0.03 75
IV.TERO.HHZ. 2020-07-21T23:41:59.38 0.3 undecidable manual P 111 36.6411 50 -0.39 67
IV.CESI.HHZ. 2020-07-21T23:41:59.78 0.1 undecidable manual P 322 37.1295 50 -0.08 95
IV.T1299.HNN. 2020-07-21T23:41:58.90 0.3 undecidable manual S 146 14.1747 126 0.25 72
IV.CAMP.HHZ. 2020-07-21T23:41:58.34 0.1 undecidable manual P 141 29.1486 50 -0.28 93
IV.FEMA.HNE. 2020-07-21T23:41:58.09 0.6 undecidable manual P 336 26.9508 50 -0.19 47
IT.MTCL.HGZ. 2020-07-21T23:41:58.83 0.1 undecidable manual P 332 31.9458 50 -0.22 93
IV.NRCA.HNZ. 2020-07-21T23:41:57.68 0.3 undecidable manual S 331 11.877 131 -0.33 71
IV.MC2.EHZ. 2020-07-21T23:41:57.01 0.1 undecidable manual P 1 19.0698 118 0.09 98
IV.RM33.EHZ. 2020-07-21T23:41:57.95 0.1 undecidable manual P 174 25.752 50 -0.14 96
IV.LNSS.HHZ. 2020-07-21T23:41:57.06 0.1 undecidable manual P 218 19.1697 118 0.12 98
IV.MMO1.EHZ. 2020-07-21T23:41:57.11 0.1 undecidable manual P 33 21.1677 116 -0.19 96
IV.GAVE.EHZ. 2020-07-21T23:41:57.88 0.1 undecidable manual P 258 24.2535 113 0.03 98
IV.T1299.HNN. 2020-07-21T23:41:56.32 0.1 undecidable manual P 146 14.1747 126 0.23 96
IV.MTRA.EHZ. 2020-07-21T23:41:56.53 0.3 negative manual P 84 17.3715 120 -0.1 74
IV.SMA1.EHZ. 2020-07-21T23:41:56.60 0.1 undecidable manual P 134 17.2716 120 -0.01 100
IV.NRCA.HNZ. 2020-07-21T23:41:55.79 0.1 undecidable manual P 331 11.877 131 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:2.7 0.005719999999999999 0.1 AML other m 2020-07-21T23:41:57.84
IV.NRCA.HNN. ML:2.6 0.004939999999999999 0.08 AML other m 2020-07-21T23:41:57.84
IV.NRCA.HHE. ML:2.6 0.00423 0.16 AML other m 2020-07-21T23:41:57.79
IV.NRCA.HNE. ML:2.6 0.00412 0.18 AML other m 2020-07-21T23:41:57.79
IV.MTRA.HNE. ML:2.0 0.0008465 0.1 AML other m 2020-07-21T23:41:59.76
IV.MTRA.EHE. ML:2.0 0.0008665000000000001 0.1 AML other m 2020-07-21T23:41:59.76
IV.MTRA.HNN. ML:1.9 0.0006245000000000001 1.12 AML other m 2020-07-21T23:41:59.75
IV.MTRA.EHN. ML:1.8 0.0005725 1.12 AML other m 2020-07-21T23:41:59.75
IV.LNSS.HHE. ML:1.8 0.0004415 0.62 AML other m 2020-07-21T23:42:00.90
IV.LNSS.HHN. ML:1.7 0.00034399999999999996 1.34 AML other m 2020-07-21T23:42:01.91
IV.GAVE.EHE. ML:1.9 0.00046199999999999995 0.16 AML other m 2020-07-21T23:42:02.04
IV.GAVE.EHN. ML:2.0 0.0006425000000000001 1.66 AML other m 2020-07-21T23:42:02.98
IV.RM33.EHE. ML:1.7 0.000258 0.1 AML other m 2020-07-21T23:42:02.59
IV.CAMP.HHN. ML:1.1 0.00005985 0.34 AML other m 2020-07-21T23:42:02.91
IV.SMA1.EHE. ML:1.4 0.000224 0.42 AML other m 2020-07-21T23:42:02.80
IV.RM33.EHN. ML:1.5 0.000166 1.54 AML other m 2020-07-21T23:42:03.04
IV.SMA1.EHN. ML:1.4 0.0001975 0.28 AML other m 2020-07-21T23:42:03.46
IV.TERO.HHN. ML:1.5 0.000123 1.54 AML other m 2020-07-21T23:42:05.92
IV.CESI.HHN. ML:1.6 0.00014850000000000003 1.78 AML other m 2020-07-21T23:42:06.89
IV.CESI.HHE. ML:1.2 0.00006435 0.7 AML other m 2020-07-21T23:42:06.29
IV.TERO.HHE. ML:1.3 0.00008035 0.24 AML other m 2020-07-21T23:42:06.44
IV.GUMA.HHE. ML:2.2 0.0005480000000000001 0.24 AML other m 2020-07-21T23:42:06.52
IV.GUMA.HHN. ML:2.0 0.000382 0.2 AML other m 2020-07-21T23:42:06.46
IV.CAMP.HHE. ML:1.0 0.00004685 0.46 AML other m 2020-07-21T23:42:06.82
IV.CSP1.EHN. ML:1.8 0.00022349999999999998 0.28 AML other m 2020-07-21T23:42:06.64
IV.CSP1.EHE. ML:1.6 0.000156 1.12 AML other m 2020-07-21T23:42:07.62
IV.ARRO.EHN. ML:1.3 0.000066 0.18 AML other m 2020-07-21T23:42:07.06
IV.ARRO.EHE. ML:1.2 0.0000538 0.2 AML other m 2020-07-21T23:42:07.24
IV.MOMA.HHE. ML:1.6 0.00011 0.62 AML other m 2020-07-21T23:42:10.44
IV.MOMA.HHN. ML:1.5 0.00007375 0.24 AML other m 2020-07-21T23:42:11.29
IV.OFFI.HHN. ML:1.4 0.00007335 0.88 AML other m 2020-07-21T23:42:11.51
IV.ASSB.HHE. ML:1.3 0.00004355 0.66 AML other m 2020-07-21T23:42:11.64
IV.ASSB.HHN. ML:1.3 0.0000487 0.2 AML other m 2020-07-21T23:42:12.17
IV.SNTG.HHE. ML:1.2 0.000031899999999999996 0.12 AML other m 2020-07-21T23:42:12.78
IV.SNTG.HHN. ML:1.2 0.0000339 0.86 AML other m 2020-07-21T23:42:13.38
IV.ATCC.EHN. ML:1.2 0.000027700000000000002 0.94 AML other m 2020-07-21T23:42:15.90
IV.OFFI.HHE. ML:1.4 0.00008094999999999999 1.24 AML other m 2020-07-21T23:42:16.77
IV.VCEL.EHE. ML:1.3 0.00003845 0.36 AML other m 2020-07-21T23:42:16.52
IV.ATCC.EHE. ML:1.3 0.00003455 0.64 AML other m 2020-07-21T23:42:16.08
IV.T0110.HHN. ML:1.4 0.0000345 0.6 AML other m 2020-07-21T23:42:18.43
IV.VCEL.EHN. ML:1.3 0.0000387 1.34 AML other m 2020-07-21T23:42:18.26
IV.T0110.HHE. ML:1.3 0.00002925 1 AML other m 2020-07-21T23:42:19.24
IV.SSFR.HHN. ML:1.6 0.000055400000000000005 1.76 AML other m 2020-07-21T23:42:19.94
IV.SSFR.HHE. ML:1.6 0.000054850000000000005 1.18 AML other m 2020-07-21T23:42:20.09
IV.MURB.HHN. ML:1.4 0.0000392 0.38 AML other m 2020-07-21T23:42:22.97
IV.FRON.EHN. ML:1.1 0.000015949999999999998 1.48 AML other m 2020-07-21T23:42:22.06
IV.MURB.HHE. ML:1.7 0.0000658 0.26 AML other m 2020-07-21T23:42:23.27
IV.FRON.EHE. ML:1.0 0.000011249999999999999 1.36 AML other m 2020-07-21T23:42:25.31
IV.PIEI.HHE. ML:1.0 0.00001145 0.32 AML other m 2020-07-21T23:42:28.72
IV.PIEI.HHN. ML:0.7 0.000007249999999999999 1.56 AML other m 2020-07-21T23:42:29.83
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