Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 25-07-2021 and time 02:17:14 (Italy) in region 5 km W Montegallo (AP)

A magnitude ML 1.7 earthquake occured in region: 5 km W Montegallo (AP), on

  • 25-07-2021 00:17:14 (UTC)
  • 25-07-2021 02:17:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8590, 13.2770 at 21 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
Montegallo AP 5 523 523
Montemonaco AP 6 604 1127
Arquata del Tronto AP 10 1178 2305
Castelsantangelo sul Nera MC 11 281 2586
Montefortino FM 11 1178 3764
Acquasanta Terme AP 15 2916 6680
Ussita MC 15 444 7124
Amandola FM 15 3629 10753
Palmiano AP 16 196 10949
Bolognola MC 16 142 11091
Comunanza AP 16 3166 14257
Roccafluvione AP 16 2010 16267
Norcia PG 17 4957 21224
Visso MC 17 1107 22331
Venarotta AP 18 2066 24397
Accumoli RI 18 667 25064
Preci PG 20 724 25788
Sarnano MC 20 3264 29052

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km NW of Teramo (54892 inhabitants)
48 Km E of Foligno (57155 inhabitants)
57 Km N of L'Aquila (69753 inhabitants)
61 Km NE of Terni (111501 inhabitants)
77 Km E of Perugia (166134 inhabitants)
81 Km W of Montesilvano (53738 inhabitants)
87 Km S of Ancona (100861 inhabitants)
88 Km NW of Pescara (121014 inhabitants)
92 Km NW 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
Bulletin
Rev1000 		ML 1.7 2021-07-25
00:17:14		 42.8587 13.2772 21 2021-12-29
11:12:14		 Bollettino Sismico Italiano INGV 93262171
Reviewed
Rev100 		ML 1.7 2021-07-25
00:17:13		 42.8555 13.2767 22 2021-07-25
00:26:09		 Sala Sismica INGV-Roma 93173561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-25 00:17:14 ± 0.06
Latitude 42.8587 ± 0.0027
Longitude 13.2772 ± 0.0049
Depth (km) 21 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 93262171

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 420
Semi-minor axis of confidence ellipse (meter) 131
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 95
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 58
Number of associated phases, regardless of their use for origin computation 47
Number of defining phases 46
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.72845
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 32
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 51
Type of magnitude ML
Reference to an origin 93173561
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-25 00:26:09

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 51
Type of magnitude ML
Reference to an origin 93262171
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-07-27 07:23:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.T0110.HHZ. 2021-07-25T00:17:28.10 0.3 undecidable manual P 150 80.8635 98 0.01 66
IV.MURB.HHZ. 2021-07-25T00:17:28.19 0.3 undecidable manual P 307 75.7686 99 0.88 51
IV.GAVE.EHZ. 2021-07-25T00:17:27.31 0.3 undecidable manual S 240 36.2415 112 0.55 64
IV.CESI.HHZ. 2021-07-25T00:17:26.65 0.6 undecidable manual S 298 34.3434 113 0.36 45
IV.PF6.EHN. 2021-07-25T00:17:25.32 0.1 undecidable manual S 348 31.746 116 -0.33 91
IV.FOSV.EHZ. 2021-07-25T00:17:25.35 0.3 undecidable manual P 319 63.9915 101 -0.17 67
IV.ATCC.EHZ. 2021-07-25T00:17:25.39 0.3 undecidable manual P 305 63.0924 101 0 68
IV.SAP2.EHZ. 2021-07-25T00:17:25.35 0.6 undecidable manual S 21 28.2495 119 0.53 43
IV.FIAM.HHZ. 2021-07-25T00:17:25.90 0.1 undecidable manual P 191 66.7776 101 -0.05 90
IV.VCEL.EHZ. 2021-07-25T00:17:24.70 3.0 positive manual P -1.79 0
IV.CSP1.EHE. 2021-07-25T00:17:24.26 0.6 undecidable manual S 347 26.5512 121 -0.18 47
IV.CING.HHZ. 2021-07-25T00:17:24.43 0.1 undecidable manual P 353 57.6978 103 -0.15 90
IV.SMA1.EHZ. 2021-07-25T00:17:24.06 0.1 undecidable manual S 169 25.752 122 -0.19 93
IV.EL6.EHZ. 2021-07-25T00:17:24.06 0.1 undecidable manual P 345 54.1014 104 0.02 92
IV.T1299.EHZ. 2021-07-25T00:17:24.45 0.6 undecidable manual S 179 24.8529 123 0.39 46
IV.FDMO.HHZ. 2021-07-25T00:17:23.84 0.6 undecidable manual S 322 25.0527 123 -0.26 47
IV.ASSB.HHZ. 2021-07-25T00:17:23.96 0.1 undecidable manual P 292 54.2013 104 -0.09 92
IV.MF5.EHZ. 2021-07-25T00:17:23.34 0.1 undecidable manual S 46 20.6682 129 0.2 95
IV.ARRO.EHZ. 2021-07-25T00:17:23.83 0.1 undecidable manual P 234 51.9036 104 0.12 91
IV.FEMA.HNE. 2021-07-25T00:17:23.57 0.6 undecidable manual S 302 21.7671 127 0.19 47
IV.GUMA.HHZ. 2021-07-25T00:17:23.92 0.1 undecidable manual S 12 23.1546 125 0.25 94
IV.MNTT.EHZ. 2021-07-25T00:17:21.55 0.1 undecidable manual P 49 34.3434 113 0.41 88
IV.NRCA.HHZ. 2021-07-25T00:17:21.88 0.6 undecidable manual S 258 13.5753 143 0.06 50
IV.MNTP.HNE. 2021-07-25T00:17:21.30 0.1 undecidable manual P 27 34.6431 113 0.12 94
IV.CESI.HHZ. 2021-07-25T00:17:21.10 0.1 undecidable manual P 298 34.3434 113 -0.04 96
IV.CAMP.HHZ. 2021-07-25T00:17:21.31 0.1 undecidable manual P 163 37.3293 111 -0.26 90
IV.LNSS.HHZ. 2021-07-25T00:17:21.21 0.1 undecidable manual P 214 34.3434 113 0.08 95
IV.MC2.EHE. 2021-07-25T00:17:21.20 0.6 undecidable manual S 309 9.2796 153 -0.01 50
IV.OFFI.HHZ. 2021-07-25T00:17:21.60 0.1 undecidable manual P 76 34.2435 113 0.47 88
IV.GAVE.EHZ. 2021-07-25T00:17:21.61 0.1 undecidable manual P 240 36.2415 112 0.2 92
IV.MML1.HNE. 2021-07-25T00:17:21.35 0.1 undecidable manual P 319 37.629 111 -0.25 92
IV.TERO.HHZ. 2021-07-25T00:17:21.30 0.1 undecidable manual P 134 37.3293 111 -0.26 90
IV.MTRA.HNZ. 2021-07-25T00:17:21.75 0.6 undecidable manual S 139 14.874 140 -0.3 46
IV.RM33.EHZ. 2021-07-25T00:17:21.78 0.1 positive manual P 188 39.1275 110 -0.04 95
IV.SAP2.EHZ. 2021-07-25T00:17:20.33 0.1 undecidable manual P 21 28.2495 119 0.04 97
IV.PF6.EHN. 2021-07-25T00:17:20.42 0.1 undecidable manual P 348 31.746 116 -0.35 91
IV.FEMA.HNE. 2021-07-25T00:17:19.42 0.1 undecidable manual P 302 21.7671 127 -0.04 98
IV.SMA1.EHZ. 2021-07-25T00:17:19.86 0.1 positive manual P 169 25.752 122 -0.1 95
IV.GUMA.HHZ. 2021-07-25T00:17:19.55 0.1 undecidable manual P 12 23.1546 125 -0.08 97
IV.T1299.EHZ. 2021-07-25T00:17:19.92 0.1 positive manual P 179 24.8529 123 0.07 97
IV.FDMO.HHZ. 2021-07-25T00:17:19.61 0.1 undecidable manual P 322 25.0527 123 -0.26 93
IT.MTCL.HGZ. 2021-07-25T00:17:19.96 0.1 positive manual P 304 27.1506 120 -0.18 95
IV.MF5.EHZ. 2021-07-25T00:17:19.39 0.1 negative manual P 46 20.6682 129 0.07 98
IV.CSP1.EHE. 2021-07-25T00:17:19.84 0.1 negative manual P 347 26.5512 121 -0.22 94
IV.MC2.EHE. 2021-07-25T00:17:18.13 0.1 undecidable manual P 309 9.2796 153 -0.07 99
IV.MTRA.HNZ. 2021-07-25T00:17:18.47 0.1 positive manual P 139 14.874 140 -0.22 95
IV.NRCA.HHZ. 2021-07-25T00:17:18.56 0.1 undecidable manual P 258 13.5753 143 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:2.4 0.0017349999999999998 0.1 AML other m 2021-07-25T00:17:22.12
IV.NRCA.HNE. ML:2.4 0.0017000000000000001 0.1 AML other m 2021-07-25T00:17:22.12
IV.NRCA.HHN. ML:2.8 0.004165 0.14 AML other m 2021-07-25T00:17:22.03
IV.NRCA.HNN. ML:2.8 0.0037699999999999995 0.16 AML other m 2021-07-25T00:17:22.02
IV.MTRA.EHE. ML:1.8 0.00037252085 0.12 AML other m 2021-07-25T00:17:22.19
IV.MTRA.HNE. ML:1.8 0.00037789385 0.12 AML other m 2021-07-25T00:17:22.13
IV.MTRA.HNN. ML:1.8 0.00038506065 0.08 AML other m 2021-07-25T00:17:22.78
IV.MTRA.EHN. ML:1.8 0.000379 0.08 AML other m 2021-07-25T00:17:22.78
IV.MF5.EHN. ML:2.0 0.000501 0.22 AML other m 2021-07-25T00:17:23.66
IV.MF5.EHE. ML:1.9 0.0004015 0.26 AML other m 2021-07-25T00:17:23.62
IV.GUMA.HHN. ML:1.8 0.000312 0.28 AML other m 2021-07-25T00:17:24.09
IV.SMA1.EHN. ML:1.8 0.000282 0.54 AML other m 2021-07-25T00:17:24.92
IV.SMA1.EHE. ML:1.6 0.0001975 0.2 AML other m 2021-07-25T00:17:24.68
IV.GUMA.HHE. ML:1.8 0.0003025 1.46 AML other m 2021-07-25T00:17:25.01
IV.SAP2.EHN. ML:2.4 0.000951 0.46 AML other m 2021-07-25T00:17:26.48
IV.SAP2.EHE. ML:1.7 0.000201 0.24 AML other m 2021-07-25T00:17:26.49
IV.CAMP.HHE. ML:1.4 0.0000852 0.38 AML other m 2021-07-25T00:17:27.27
IV.LNSS.HHN. ML:1.8 0.000224 0.46 AML other m 2021-07-25T00:17:27.13
IV.CESI.HHN. ML:1.6 0.0001445 0.94 AML other m 2021-07-25T00:17:27.62
IV.TERO.HNE. ML:1.7 0.0001692827 0.08 AML other m 2021-07-25T00:17:27.65
IV.TERO.HNN. ML:1.7 0.000150460075 0.09 AML other m 2021-07-25T00:17:27.71
IV.CESI.HHE. ML:1.4 0.00010115 1.24 AML other m 2021-07-25T00:17:27.23
IV.GAVE.EHN. ML:2.0 0.00035950000000000006 0.48 AML other m 2021-07-25T00:17:27.97
IV.LNSS.HHE. ML:1.8 0.000246 0.32 AML other m 2021-07-25T00:17:28.02
IV.GAVE.EHE. ML:2.0 0.0003325 1.04 AML other m 2021-07-25T00:17:28.08
IV.RM33.EHN. ML:1.7 0.00015900000000000002 0.28 AML other m 2021-07-25T00:17:28.37
IV.TERO.HHN. ML:1.6 0.00014500000000000003 0.5 AML other m 2021-07-25T00:17:28.71
IV.TERO.HHE. ML:1.8 0.0001965 0.54 AML other m 2021-07-25T00:17:28.79
IV.RM33.EHE. ML:1.8 0.0001885 0.56 AML other m 2021-07-25T00:17:28.66
IV.OFFI.HHN. ML:1.6 0.0001225 0.92 AML other m 2021-07-25T00:17:28.70
IV.CAMP.HHN. ML:1.4 0.00008979999999999999 0.92 AML other m 2021-07-25T00:17:28.88
IV.MNTT.EHN. ML:2.0 0.0003175 0.4 AML other m 2021-07-25T00:17:29.91
IV.MNTT.EHE. ML:2.3 0.0007664999999999999 1.46 AML other m 2021-07-25T00:17:29.92
IV.GUMA.HNE. ML:1.7 0.0002322935 0.36 AML other m 2021-07-25T00:17:30.64
IV.OFFI.HHE. ML:1.4 0.00010155 0.72 AML other m 2021-07-25T00:17:31.36
IV.ARRO.EHE. ML:1.3 0.000049699999999999995 0.82 AML other m 2021-07-25T00:17:31.70
IV.ARRO.EHN. ML:1.3 0.000045350000000000005 0.86 AML other m 2021-07-25T00:17:32.27
IV.ASSB.HHE. ML:1.5 0.00006659999999999999 0.56 AML other m 2021-07-25T00:17:33.41
IV.CING.HHN. ML:1.6 0.00009080000000000001 0.12 AML other m 2021-07-25T00:17:33.36
IV.CING.HHE. ML:1.6 0.00008265 1.36 AML other m 2021-07-25T00:17:33.05
IV.ASSB.HHN. ML:1.4 0.000051250000000000006 1.38 AML other m 2021-07-25T00:17:33.12
IV.ATCC.EHE. ML:1.4 0.0000483 1.68 AML other m 2021-07-25T00:17:34.06
IV.FOSV.EHE. ML:1.5 0.00005885 0.3 AML other m 2021-07-25T00:17:35.00
IV.FOSV.EHN. ML:1.7 0.0000854 1.08 AML other m 2021-07-25T00:17:35.40
IV.ATCC.EHN. ML:1.5 0.00005465000000000001 1.72 AML other m 2021-07-25T00:17:35.02
IV.FIAM.HHN. ML:0.8 0.000011500136499999998 0.2 AML other m 2021-07-25T00:17:36.15
IV.T0110.HHN. ML:1.7 0.000058450000000000005 0.36 AML other m 2021-07-25T00:17:39.72
IV.FIAM.HHE. ML:0.8 0.00001115 0.42 AML other m 2021-07-25T00:17:39.69
IV.MURB.HHN. ML:1.7 0.0000761 0.24 AML other m 2021-07-25T00:17:40.44
IV.T0110.HHE. ML:1.6 0.00005015 1.06 AML other m 2021-07-25T00:17:43.75
IV.MURB.HHE. ML:1.7 0.00007735 1.4 AML other m 2021-07-25T00:17:43.22
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