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) 42.91, 13.038 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.

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
Acquacanina MC 17 121 12152
Pievebovigliana MC 17 866 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

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event *

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event *

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event *

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019 *

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire *

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
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
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
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 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 0.8867 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 0.7752 50 0.02 66
IV.VCEL.EHZ. 2021-08-25T15:11:05.34 0.3 undecidable manual P 131 0.7833 50 0.02 66
IV.MGAB.HHZ. 2021-08-25T15:11:04.15 0.3 undecidable manual P 271 0.6781 50 0.62 58
IV.FRON.EHZ. 2021-08-25T15:11:03.38 0.3 undecidable manual P 340 0.6484 50 0.36 63
IV.MF5.EHZ. 2021-08-25T15:11:03.17 0.3 undecidable manual S 76 0.3175 50 0.76 59
IV.ATVO.HHZ. 2021-08-25T15:11:03.33 0.3 undecidable manual P 316 0.6592 50 0.12 66
IV.SAP2.EHZ. 2021-08-25T15:11:03.18 0.1 undecidable manual S 55 0.3229 50 0.62 83
IV.LNSS.HHZ. 2021-08-25T15:11:02.25 0.6 undecidable manual S 180 0.3076 50 0.15 47
IV.ASSB.HHZ. 2021-08-25T15:11:02.06 0.1 undecidable manual S 296 0.3076 50 -0.05 96
IV.ARVD.HHZ. 2021-08-25T15:11:01.86 0.3 undecidable manual P 353 0.5918 50 -0.19 66
IV.GUMA.HHZ. 2021-08-25T15:11:01.17 0.6 undecidable manual S 55 0.2653 50 0.32 46
IV.MTRA.EHZ. 2021-08-25T15:11:01.68 0.1 undecidable manual S 120 0.304 50 -0.32 91
IV.ATFO.HHZ. 2021-08-25T15:11:01.84 0.3 undecidable manual P 323 0.5693 50 0.17 66
IV.CING.HHZ. 2021-08-25T15:11:00.00 0.3 undecidable manual P 14 0.4793 50 -0.12 69
IV.GAVE.EHZ. 2021-08-25T15:11:00.01 0.3 undecidable manual S 206 0.2419 50 -0.16 71
IV.MURB.HHZ. 2021-08-25T15:11:00.82 0.3 undecidable manual P 313 0.5144 50 0.09 68
IV.TERO.HHZ. 2021-08-25T15:11:00.54 0.3 undecidable manual P 125 0.5045 50 -0.02 70
IV.FOSV.EHZ. 2021-08-25T15:10:59.25 0.3 undecidable manual P 332 0.4344 50 -0.11 69
IV.RM33.EHZ. 2021-08-25T15:10:59.02 0.3 undecidable manual P 162 0.4209 50 -0.12 69
IV.CSP1.EHZ. 2021-08-25T15:10:59.16 0.6 undecidable manual S 34 0.2185 50 -0.31 46
IV.MNTT.EHZ. 2021-08-25T15:10:59.79 0.3 undecidable manual P 69 0.4344 50 0.43 65
IV.CESX.HHZ. 2021-08-25T15:10:59.64 0.1 undecidable manual P 228 0.4479 50 0.05 93
IV.MML1.EHZ. 2021-08-25T15:10:58.77 0.6 undecidable manual S 347 0.2086 50 -0.42 45
IV.ATCC.EHZ. 2021-08-25T15:10:58.66 0.3 undecidable manual P 313 0.4002 50 -0.11 70
IV.ARRO.EHZ. 2021-08-25T15:10:58.56 0.6 undecidable manual P 211 0.3867 50 0.02 48
IV.MMO1.EHZ. 2021-08-25T15:10:58.69 0.3 undecidable manual S 93 0.2113 50 -0.57 65
IV.EL6.EHZ. 2021-08-25T15:10:58.89 0.3 undecidable manual P 6 0.4218 50 -0.25 68
IV.SAP2.EHZ. 2021-08-25T15:10:57.63 0.1 positive manual P 55 0.3229 50 0.18 93
IV.ASSB.HHZ. 2021-08-25T15:10:57.04 0.1 positive manual P 296 0.3076 50 -0.15 94
IV.SMA1.EHZ. 2021-08-25T15:10:57.94 0.3 undecidable manual P 142 0.3543 50 -0.05 71
IV.T1299.HNN. 2021-08-25T15:10:57.73 0.3 undecidable manual P 147 0.3292 50 0.18 70
IV.LNSS.HHZ. 2021-08-25T15:10:57.09 0.1 undecidable manual P 180 0.3076 50 -0.09 95
IV.MF5.EHZ. 2021-08-25T15:10:57.57 0.1 positive manual P 76 0.3175 50 0.21 93
IV.MOMA.HHZ. 2021-08-25T15:10:57.99 0.3 undecidable manual P 253 0.3588 50 -0.08 71
IV.MC2.EHZ. 2021-08-25T15:10:56.10 0.3 undecidable manual S 89 0.1106 131 -0.01 75
IV.MTRA.EHZ. 2021-08-25T15:10:56.83 0.1 undecidable manual P 120 0.304 50 -0.3 91
IT.FOPC.HGZ. 2021-08-25T15:10:56.30 0.3 undecidable manual P 284 0.2527 50 0.05 73
IV.FDMO.HHZ. 2021-08-25T15:10:56.40 0.6 undecidable manual S 16 0.1313 126 -0.34 47
IV.CESI.HNZ. 2021-08-25T15:10:56.85 0.3 undecidable manual S 314 0.1358 125 -0.05 74
IV.GUMA.HHZ. 2021-08-25T15:10:56.51 0.1 positive manual P 55 0.2653 50 0.05 97
IV.GAVE.EHZ. 2021-08-25T15:10:56.16 0.1 positive manual P 206 0.2419 50 0.09 96
IV.PF6.EHN. 2021-08-25T15:10:55.94 0.1 undecidable manual P 27 0.2545 50 -0.34 91
IV.MMO1.EHZ. 2021-08-25T15:10:55.33 0.1 positive manual P 93 0.2113 50 -0.22 94
IV.MML1.EHZ. 2021-08-25T15:10:55.33 0.1 negative manual P 347 0.2086 50 -0.17 95
IT.MTCL.HGZ. 2021-08-25T15:10:55.32 0.1 undecidable manual S 341 0.0881 138 -0.19 97
IV.CSP1.EHZ. 2021-08-25T15:10:55.46 0.1 positive manual P 34 0.2185 50 -0.2 95
IV.NRCA.HNZ. 2021-08-25T15:10:55.55 0.3 undecidable manual S 144 0.0944 136 -0.13 74
IV.SEF1.HNN. 2021-08-25T15:10:55.85 0.3 undecidable manual P 344 0.2455 50 -0.28 69
IV.FEMA.HNZ. 2021-08-25T15:10:54.82 0.6 undecidable manual S 9 0.0522 151 0.12 50
IV.FDMO.HHZ. 2021-08-25T15:10:54.02 0.1 negative manual P 16 0.1313 126 -0.07 99
IV.CESI.HNZ. 2021-08-25T15:10:54.31 0.1 undecidable manual P 314 0.1358 125 0.13 98
IV.NRCA.HNZ. 2021-08-25T15:10:53.57 0.1 negative manual P 144 0.0944 136 0.1 99
IV.MC2.EHZ. 2021-08-25T15:10:53.84 0.1 undecidable manual P 89 0.1106 131 0.11 98
IV.FEMA.HNZ. 2021-08-25T15:10:53.15 0.1 negative manual P 9 0.0522 151 0.24 97
IT.MTCL.HGZ. 2021-08-25T15:10:53.43 0.1 negative manual P 341 0.0881 138 0.05 100
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 0.002989591 0.1664 AML other m 2021-08-25T15:10:56.00
IV.FEMA.HNE. ML:2.3 0.003049111 0.1664 AML other m 2021-08-25T15:10:55.66
IV.FDMO.HHN. ML:2.4 0.0022062785 0.2176 AML other m 2021-08-25T15:10:56.62
IV.FDMO.HHE. ML:2.2 0.00162 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 0.00054246835 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 0.0020947275 0.1408 AML other m 2021-08-25T15:11:00.92
IV.CSP1.EHN. ML:2.6 0.002146917 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 0.0004985 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 0.001222944 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 0.00052895025 0.192 AML other m 2021-08-25T15:11:02.48
IV.MTRA.HNN. ML:2.1 0.0005715 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 0.0004090931 0.256 AML other m 2021-08-25T15:11:02.96
IV.LNSS.HHN. ML:2 0.0004405 1.26 AML other m 2021-08-25T15:11:03.03
IV.LNSS.HNN. ML:2 0.00039543155 0.2304 AML other m 2021-08-25T15:11:04.46
IV.SAP2.EHN. ML:3 0.0037736045 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 0.0015665595 0.384 AML other m 2021-08-25T15:11:04.10
IV.LNSS.HNE. ML:2 0.0004022107 0.7168 AML other m 2021-08-25T15:11:10.59
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions *

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
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