Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 25-08-2021 and time 15:10:50 (UTC) in region 3 km N Preci (PG)

A magnitude ML 2.3 earthquake occured in region: 3 km N Preci (PG), on

  • 25-08-2021 15:10:50 (UTC)
  • 25-08-2021 17:10:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9100, 13.0380 at 11 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
Preci PG 3 724 724
Visso MC 5 1107 1831
Ussita MC 9 444 2275
Sellano PG 9 1079 3354
Castelsantangelo sul Nera MC 10 281 3635
Monte Cavallo MC 10 145 3780
Norcia PG 14 4957 8737
Cerreto di Spoleto PG 14 1075 9812
Fiordimonte MC 15 202 10014
Pieve Torina MC 15 1458 11472
Fiastra MC 17 559 12031
Pievebovigliana MC 17 866 12897
Acquacanina MC 17 121 13018
Bolognola MC 18 142 13160
Muccia MC 19 915 14075
Serravalle di Chienti MC 19 1070 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Foligno (57155 inhabitants)
50 Km NE of Terni (111501 inhabitants)
57 Km E of Perugia (166134 inhabitants)
61 Km W of Teramo (54892 inhabitants)
69 Km NW of L'Aquila (69753 inhabitants)
88 Km SW of Ancona (100861 inhabitants)
94 Km NE 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 2.3 2021-08-25
15:10:50		 42.9102 13.0383 11 2021-12-29
11:12:27		 Bollettino Sismico Italiano INGV 95160991
Reviewed
Rev100 		ML 2.2 2021-08-25
15:10:50		 42.9138 13.0378 11 2021-08-25
15:16:10		 Sala Sismica INGV-Roma 94625651
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-25 15:10:50 ± 0.04
Latitude 42.9102 ± 0.0027
Longitude 13.0383 ± 0.0037
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 95160991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 299
Semi-minor axis of confidence ellipse (meter) 230
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 37
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) 27
Number of associated phases, regardless of their use for origin computation 59
Number of defining phases 56
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) 0.88673
Number of stations at which the event was observed 43
Number of stations from which data was used for origin computation 40
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 38
Type of magnitude ML
Reference to an origin 95160991
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-07 14:09:50

ML:2.2

Field Value
Value 2.2
Uncertainty 0.3
Num. used stations 68
Type of magnitude ML
Reference to an origin 94625651
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-25 15:16:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MTRZ.HNZ. 2021-08-25T15:11:48.35 3.0 undecidable manual Sg 3.41 0
IV.POFI.HHZ. 2021-08-25T15:11:11.58 3.0 undecidable manual P -2.12 0
IV.CAFI.HHZ. 2021-08-25T15:11:07.67 0.3 undecidable manual P 299 98.4237 50 0.57 56
IV.PE3.EHZ. 2021-08-25T15:11:06.06 3.0 undecidable manual P -1.63 0
IV.NARO.HHZ. 2021-08-25T15:11:05.21 0.3 undecidable manual P 335 86.0472 50 0.02 66
IV.VCEL.EHZ. 2021-08-25T15:11:05.34 0.3 undecidable manual P 131 86.9463 50 0.02 66
IV.MGAB.HHZ. 2021-08-25T15:11:04.15 0.3 undecidable manual P 271 75.2691 50 0.62 58
IV.MF5.EHZ. 2021-08-25T15:11:03.17 0.3 undecidable manual S 76 35.2425 50 0.76 59
IV.ATVO.HHZ. 2021-08-25T15:11:03.33 0.3 undecidable manual P 316 73.1712 50 0.12 66
IV.SAP2.EHZ. 2021-08-25T15:11:03.18 0.1 undecidable manual S 55 35.8419 50 0.62 83
IV.FRON.EHZ. 2021-08-25T15:11:03.38 0.3 undecidable manual P 340 71.9724 50 0.36 63
IV.ASSB.HHZ. 2021-08-25T15:11:02.06 0.1 undecidable manual S 296 34.1436 50 -0.05 96
IV.LNSS.HHZ. 2021-08-25T15:11:02.25 0.6 undecidable manual S 180 34.1436 50 0.15 47
IV.GUMA.HHZ. 2021-08-25T15:11:01.17 0.6 undecidable manual S 55 29.4483 50 0.32 46
IV.MTRA.EHZ. 2021-08-25T15:11:01.68 0.1 undecidable manual S 120 33.744 50 -0.32 91
IV.ATFO.HHZ. 2021-08-25T15:11:01.84 0.3 undecidable manual P 323 63.1923 50 0.17 66
IV.ARVD.HHZ. 2021-08-25T15:11:01.86 0.3 undecidable manual P 353 65.6898 50 -0.19 66
IV.CING.HHZ. 2021-08-25T15:11:00.00 0.3 undecidable manual P 14 53.2023 50 -0.12 69
IV.GAVE.EHZ. 2021-08-25T15:11:00.01 0.3 undecidable manual S 206 26.8509 50 -0.16 71
IV.MURB.HHZ. 2021-08-25T15:11:00.82 0.3 undecidable manual P 313 57.0984 50 0.09 68
IV.TERO.HHZ. 2021-08-25T15:11:00.54 0.3 undecidable manual P 125 55.9995 50 -0.02 70
IV.CSP1.EHZ. 2021-08-25T15:10:59.16 0.6 undecidable manual S 34 24.2535 50 -0.31 46
IV.MNTT.EHZ. 2021-08-25T15:10:59.79 0.3 undecidable manual P 69 48.2184 50 0.43 65
IV.CESX.HHZ. 2021-08-25T15:10:59.64 0.1 undecidable manual P 228 49.7169 50 0.05 93
IV.FOSV.EHZ. 2021-08-25T15:10:59.25 0.3 undecidable manual P 332 48.2184 50 -0.11 69
IV.RM33.EHZ. 2021-08-25T15:10:59.02 0.3 undecidable manual P 162 46.7199 50 -0.12 69
IV.ATCC.EHZ. 2021-08-25T15:10:58.66 0.3 undecidable manual P 313 44.4222 50 -0.11 70
IV.ARRO.EHZ. 2021-08-25T15:10:58.56 0.6 undecidable manual P 211 42.9237 50 0.02 48
IV.MMO1.EHZ. 2021-08-25T15:10:58.69 0.3 undecidable manual S 93 23.4543 50 -0.57 65
IV.EL6.EHZ. 2021-08-25T15:10:58.89 0.3 undecidable manual P 6 46.8198 50 -0.25 68
IV.MML1.EHZ. 2021-08-25T15:10:58.77 0.6 undecidable manual S 347 23.1546 50 -0.42 45
IV.ASSB.HHZ. 2021-08-25T15:10:57.04 0.1 positive manual P 296 34.1436 50 -0.15 94
IV.SMA1.EHZ. 2021-08-25T15:10:57.94 0.3 undecidable manual P 142 39.3273 50 -0.05 71
IV.T1299.HNN. 2021-08-25T15:10:57.73 0.3 undecidable manual P 147 36.5412 50 0.18 70
IV.LNSS.HHZ. 2021-08-25T15:10:57.09 0.1 undecidable manual P 180 34.1436 50 -0.09 95
IV.MF5.EHZ. 2021-08-25T15:10:57.57 0.1 positive manual P 76 35.2425 50 0.21 93
IV.MOMA.HHZ. 2021-08-25T15:10:57.99 0.3 undecidable manual P 253 39.8268 50 -0.08 71
IV.SAP2.EHZ. 2021-08-25T15:10:57.63 0.1 positive manual P 55 35.8419 50 0.18 93
IV.FDMO.HHZ. 2021-08-25T15:10:56.40 0.6 undecidable manual S 16 14.5743 126 -0.34 47
IV.CESI.HNZ. 2021-08-25T15:10:56.85 0.3 undecidable manual S 314 15.0738 125 -0.05 74
IV.GUMA.HHZ. 2021-08-25T15:10:56.51 0.1 positive manual P 55 29.4483 50 0.05 97
IV.GAVE.EHZ. 2021-08-25T15:10:56.16 0.1 positive manual P 206 26.8509 50 0.09 96
IV.MC2.EHZ. 2021-08-25T15:10:56.10 0.3 undecidable manual S 89 12.2766 131 -0.01 75
IV.MTRA.EHZ. 2021-08-25T15:10:56.83 0.1 undecidable manual P 120 33.744 50 -0.3 91
IT.FOPC.HGZ. 2021-08-25T15:10:56.30 0.3 undecidable manual P 284 28.0497 50 0.05 73
IV.MML1.EHZ. 2021-08-25T15:10:55.33 0.1 negative manual P 347 23.1546 50 -0.17 95
IT.MTCL.HGZ. 2021-08-25T15:10:55.32 0.1 undecidable manual S 341 9.7791 138 -0.19 97
IV.CSP1.EHZ. 2021-08-25T15:10:55.46 0.1 positive manual P 34 24.2535 50 -0.2 95
IV.NRCA.HNZ. 2021-08-25T15:10:55.55 0.3 undecidable manual S 144 10.4784 136 -0.13 74
IV.SEF1.HNN. 2021-08-25T15:10:55.85 0.3 undecidable manual P 344 27.2505 50 -0.28 69
IV.PF6.EHN. 2021-08-25T15:10:55.94 0.1 undecidable manual P 27 28.2495 50 -0.34 91
IV.MMO1.EHZ. 2021-08-25T15:10:55.33 0.1 positive manual P 93 23.4543 50 -0.22 94
IV.FEMA.HNZ. 2021-08-25T15:10:54.82 0.6 undecidable manual S 9 5.7942 151 0.12 50
IV.FDMO.HHZ. 2021-08-25T15:10:54.02 0.1 negative manual P 16 14.5743 126 -0.07 99
IV.CESI.HNZ. 2021-08-25T15:10:54.31 0.1 undecidable manual P 314 15.0738 125 0.13 98
IV.MC2.EHZ. 2021-08-25T15:10:53.84 0.1 undecidable manual P 89 12.2766 131 0.11 98
IV.FEMA.HNZ. 2021-08-25T15:10:53.15 0.1 negative manual P 9 5.7942 151 0.24 97
IT.MTCL.HGZ. 2021-08-25T15:10:53.43 0.1 negative manual P 341 9.7791 138 0.05 100
IV.NRCA.HNZ. 2021-08-25T15:10:53.57 0.1 negative manual P 144 10.4784 136 0.1 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:2.6 0.00491 0.12 AML other m 2021-08-25T15:10:55.75
IV.NRCA.HHN. ML:2.6 0.0052480855 0.1152 AML other m 2021-08-25T15:10:55.74
IV.NRCA.HHE. ML:2.3 0.002585 0.12 AML other m 2021-08-25T15:10:55.82
IV.NRCA.HNE. ML:2.2 0.002110871 0.1024 AML other m 2021-08-25T15:10:55.81
IV.FEMA.HNN. ML:2.3 0.0029895909999999998 0.1664 AML other m 2021-08-25T15:10:56.00
IV.FEMA.HNE. ML:2.3 0.0030491109999999997 0.1664 AML other m 2021-08-25T15:10:55.66
IV.FDMO.HHN. ML:2.4 0.0022062784999999996 0.2176 AML other m 2021-08-25T15:10:56.62
IV.FDMO.HHE. ML:2.2 0.0016200000000000001 0.12 AML other m 2021-08-25T15:10:56.77
IV.CESI.HHE. ML:2.5 0.0027992115 0.1152 AML other m 2021-08-25T15:10:57.05
IV.CESI.HNE. ML:2.5 0.002732364 0.128 AML other m 2021-08-25T15:10:57.05
IV.CESI.HNN. ML:2.6 0.004074663 0.1664 AML other m 2021-08-25T15:10:57.24
IV.CESI.HHN. ML:2.7 0.004271517 0.1536 AML other m 2021-08-25T15:10:57.24
IV.MML1.EHN. ML:1.9 0.0005424683500000001 0.256 AML other m 2021-08-25T15:10:59.72
IV.MML1.HNN. ML:1.9 0.0005302841 0.192 AML other m 2021-08-25T15:10:59.72
IV.CSP1.EHE. ML:2.5 0.0020947275000000004 0.1408 AML other m 2021-08-25T15:11:00.92
IV.CSP1.EHN. ML:2.6 0.0021469170000000004 0.1792 AML other m 2021-08-25T15:10:59.90
IV.MML1.HNE. ML:1.8 0.0004419959 0.128 AML other m 2021-08-25T15:10:59.30
IV.MML1.EHE. ML:1.8 0.00043580485 0.2176 AML other m 2021-08-25T15:11:00.49
IV.GAVE.HNN. ML:2.0 0.0004984999999999999 0.2 AML other m 2021-08-25T15:11:00.70
IV.GAVE.EHN. ML:2.4 0.001471744 0.2304 AML other m 2021-08-25T15:11:00.70
IV.GAVE.HNE. ML:2.6 0.002048311 0.192 AML other m 2021-08-25T15:11:01.09
IV.GAVE.EHE. ML:2.6 0.002045 0.18 AML other m 2021-08-25T15:11:01.09
IV.GUMA.HNN. ML:2.4 0.00133069015 0.1408 AML other m 2021-08-25T15:11:01.33
IV.GUMA.HHN. ML:2.6 0.001945 0.28 AML other m 2021-08-25T15:11:01.34
IV.GUMA.HNE. ML:2.4 0.0012229440000000001 0.4096 AML other m 2021-08-25T15:11:03.01
IV.MTRA.HNE. ML:2.1 0.0005295592 0.1792 AML other m 2021-08-25T15:11:02.48
IV.MTRA.EHE. ML:2.1 0.0005289502499999999 0.192 AML other m 2021-08-25T15:11:02.48
IV.MTRA.HNN. ML:2.1 0.0005714999999999999 0.24 AML other m 2021-08-25T15:11:02.50
IV.MTRA.EHN. ML:2.1 0.0005945 0.24 AML other m 2021-08-25T15:11:02.50
IV.LNSS.HHE. ML:2.0 0.0004090931 0.256 AML other m 2021-08-25T15:11:02.96
IV.LNSS.HHN. ML:2.0 0.00044050000000000003 1.26 AML other m 2021-08-25T15:11:03.03
IV.LNSS.HNN. ML:2.0 0.00039543155000000004 0.2304 AML other m 2021-08-25T15:11:04.46
IV.SAP2.EHN. ML:3.0 0.0037736045000000005 0.1536 AML other m 2021-08-25T15:11:03.64
IV.MF5.EHE. ML:2.4 0.0009165 0.24 AML other m 2021-08-25T15:11:03.73
IV.MF5.EHN. ML:2.1 0.0005825876 0.2304 AML other m 2021-08-25T15:11:03.74
IV.SAP2.EHE. ML:2.1 0.000503773 0.2048 AML other m 2021-08-25T15:11:04.28
IV.GUMA.HHE. ML:2.5 0.0015665594999999999 0.384 AML other m 2021-08-25T15:11:04.10
IV.LNSS.HNE. ML:2.0 0.0004022107 0.7168 AML other m 2021-08-25T15:11:10.59
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