Earthquake with magnitude of ML 1.8 on date 17-11-2021 and time 02:47:59 (Italy) in region 2 km NW Civitella d'Agliano (VT)

A magnitude ML 1.8 earthquake occured in region: 2 km NW Civitella d'Agliano (VT), on

  • 17-11-2021 01:47:59 (UTC)
  • 17-11-2021 02:47:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6170, 12.1720 at 6 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
Civitella d'Agliano VT 2 1640 1640
Castiglione in Teverina VT 4 2329 3969
Graffignano VT 6 2292 6261
Lubriano VT 6 909 7170
Bagnoregio VT 6 3650 10820
Baschi TR 7 2722 13542
Celleno VT 7 1355 14897
Porano TR 10 1966 16863
Guardea TR 10 1836 18699
Alviano TR 11 1463 20162
Montecchio TR 11 1676 21838
Orvieto TR 13 20630 42468
Lugnano in Teverina TR 14 1494 43962
Montefiascone VT 15 13432 57394
Attigliano TR 15 2028 59422
Bomarzo VT 15 1805 61227
Bolsena VT 15 3991 65218
Vitorchiano VT 16 5233 70451
Giove TR 17 1928 72379
Castel Giorgio TR 19 2131 74510

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km N of Viterbo (67173 inhabitants)
39 Km W of Terni (111501 inhabitants)
57 Km SW of Perugia (166134 inhabitants)
58 Km SW of Foligno (57155 inhabitants)
66 Km NE of Civitavecchia (52991 inhabitants)
82 Km NW of Guidonia Montecelio (88673 inhabitants)
85 Km NW of Roma (2864731 inhabitants)
88 Km E of Grosseto (82087 inhabitants)
89 Km NW of Tivoli (56533 inhabitants)
94 Km N of Fiumicino (78395 inhabitants)
97 Km S of Arezzo (99543 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

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 1.8 2021-11-17
01:47:59
42.6173 12.1725 6 2022-03-30
13:04:17
Bollettino Sismico Italiano INGV 97755371
Reviewed
Rev100
ML 1.7 2021-11-17
01:47:59
42.6147 12.176 7 2021-11-17
01:58:42
Sala Sismica INGV-Roma 97506231
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-17 01:47:59 ± 0.07
Latitude 42.6173 ± 0.0027
Longitude 12.1725 ± 0.0037
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97755371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 330
Semi-minor axis of confidence ellipse (meter) 61
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 208
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.27070
Epicentral distance of station farthest from the epicenter (degree) 0.98386
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.4
Num. used stations 20
Type of magnitude ML
Reference to an origin 97755371
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-08 12:05:38

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 28
Type of magnitude ML
Reference to an origin 97506231
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-17 01:58:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MURB.HHZ. 2021-11-17T01:48:23.97 0.3 undecidable manual S 22 0.6943 50 0.16 68
IV.ATCC.EHE. 2021-11-17T01:48:22.95 0.6 undecidable manual S 31 0.6628 50 0.1 46
IV.LNSS.HHZ. 2021-11-17T01:48:22.46 0.3 undecidable manual S 91 0.6385 50 0.32 67
IV.ARCI.HHZ. 2021-11-17T01:48:20.31 0.6 undecidable manual S 295 0.5630 50 0.41 44
IV.TOLF.HHZ. 2021-11-17T01:48:19.75 0.6 undecidable manual S 193 0.5675 50 -0.29 46
IV.EL6.EHZ. 2021-11-17T01:48:18.89 0.3 undecidable manual P 43 0.9839 50 0.38 61
IV.SRES.HHZ. 2021-11-17T01:48:16.44 0.6 undecidable manual S 147 0.4542 50 -0.25 47
IV.MTCE.HHZ. 2021-11-17T01:48:15.44 0.6 undecidable manual P 144 0.7285 50 1.3 29
IV.BARO.EHZ. 2021-11-17T01:48:14.19 0.3 undecidable manual S 194 0.3795 98 -0.14 73
IV.MCIV.CHZ. 2021-11-17T01:48:14.78 0.3 undecidable manual S 294 0.3984 50 -0.25 71
IV.CAFI.HNN. 2021-11-17T01:48:14.00 0.3 undecidable manual P 348 0.7276 50 -0.12 68
IV.TB01.DHZ.01 2021-11-17T01:48:14.87 0.6 undecidable manual P 14 0.7878 50 -0.28 44
IV.TB02.DHZ.01 2021-11-17T01:48:14.72 0.3 undecidable manual P 13 0.7725 50 -0.17 67
IV.MURB.HHZ. 2021-11-17T01:48:13.39 0.1 undecidable manual P 22 0.6943 50 -0.17 91
IV.LNSS.HHZ. 2021-11-17T01:48:12.55 0.3 undecidable manual P 91 0.6385 50 -0.05 71
IV.ATCC.EHE. 2021-11-17T01:48:12.74 0.1 undecidable manual P 31 0.6628 50 -0.27 90
IV.MOMA.HHZ. 2021-11-17T01:48:12.76 0.3 undecidable manual S 57 0.3462 98 -0.29 71
IV.GAVE.EHN. 2021-11-17T01:48:11.12 0.3 undecidable manual P 82 0.5360 50 0.28 69
IV.TOLF.HHZ. 2021-11-17T01:48:11.24 0.3 undecidable manual P 193 0.5675 50 -0.14 70
IV.SACS.HHZ. 2021-11-17T01:48:11.57 0.3 undecidable manual S 320 0.3013 100 0.23 73
IV.ARCI.HHZ. 2021-11-17T01:48:11.72 0.3 undecidable manual P 295 0.5630 50 0.41 67
IV.CESX.HHZ. 2021-11-17T01:48:11.78 0.3 undecidable manual S 92 0.3049 100 0.31 72
IV.MGAB.HHZ. 2021-11-17T01:48:11.08 0.3 undecidable manual S 351 0.2986 100 -0.14 74
IT.MMP1.HGE. 2021-11-17T01:48:11.69 0.6 undecidable manual P 131 0.5621 50 0.4 45
IV.ASSB.HHN. 2021-11-17T01:48:10.83 0.3 undecidable manual P 40 0.5549 50 -0.33 68
IV.SRES.HHZ. 2021-11-17T01:48:09.21 0.1 undecidable manual P 147 0.4542 50 -0.24 94
IV.LATE.HHZ. 2021-11-17T01:48:09.96 0.6 undecidable manual S 269 0.2707 101 -0.23 49
IV.BARO.EHZ. 2021-11-17T01:48:08.06 0.3 undecidable manual P 194 0.3795 98 -0.03 75
IV.ARRO.EHZ. 2021-11-17T01:48:08.97 0.6 undecidable manual P 95 0.4380 50 -0.2 48
IV.MCIV.CHZ. 2021-11-17T01:48:08.40 0.3 undecidable manual P 294 0.3984 50 -0.09 74
IV.MOMA.HHZ. 2021-11-17T01:48:07.14 0.1 undecidable manual P 57 0.3462 98 -0.21 97
IV.CESX.HHZ. 2021-11-17T01:48:06.53 0.3 undecidable manual P 92 0.3049 100 0.09 75
IV.MGAB.HHZ. 2021-11-17T01:48:06.34 0.3 undecidable manual P 351 0.2986 100 0.04 76
IV.SACS.HHZ. 2021-11-17T01:48:06.46 0.1 undecidable manual P 320 0.3013 100 0.1 100
IV.LATE.HHZ. 2021-11-17T01:48:06.05 0.3 undecidable manual P 269 0.2707 101 0.35 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LATE.HHE. ML:1.7 0.000235 0.14 AML other m 2021-11-17T01:48:11.70
IV.MGAB.HHE. ML:2.1 0.0005480000000000001 1.08 AML other m 2021-11-17T01:48:12.92
IV.MGAB.HNE. ML:2.0 0.0005215 1.04 AML other m 2021-11-17T01:48:12.92
IV.SACS.HHN. ML:1.5 0.000128 1.02 AML other m 2021-11-17T01:48:12.43
IV.MOMA.HHN. ML:1.5 0.00012025 0.68 AML other m 2021-11-17T01:48:14.92
IV.MGAB.HNN. ML:2.0 0.0005085 1.24 AML other m 2021-11-17T01:48:14.00
IV.MGAB.HHN. ML:2.0 0.00054 1.7 AML other m 2021-11-17T01:48:14.98
IV.LATE.HHN. ML:1.9 0.00040500000000000003 1.58 AML other m 2021-11-17T01:48:14.99
IV.MOMA.HHE. ML:1.8 0.0002365 0.92 AML other m 2021-11-17T01:48:16.42
IV.SRES.HHE. ML:1.5 0.0000763 0.92 AML other m 2021-11-17T01:48:16.12
IV.MCIV.CHN. ML:1.4 0.00006815 0.54 AML other m 2021-11-17T01:48:17.35
IV.SACS.HHE. ML:1.4 0.00011499999999999999 0.5 AML other m 2021-11-17T01:48:17.22
IV.SRES.HHN. ML:1.4 0.00006809999999999999 0.2 AML other m 2021-11-17T01:48:17.82
IV.MCIV.CHE. ML:1.4 0.00007705 1.1 AML other m 2021-11-17T01:48:19.44
IV.TOLF.HHN. ML:1.6 0.00008604999999999999 1.82 AML other m 2021-11-17T01:48:22.04
IV.TOLF.HHE. ML:1.7 0.00009425 0.94 AML other m 2021-11-17T01:48:23.91
IV.MURB.HHE. ML:2.4 0.000372 0.42 AML other m 2021-11-17T01:48:28.31
IV.MURB.HNE. ML:2.4 0.0003845 1.08 AML other m 2021-11-17T01:48:28.12
IV.MURB.HHN. ML:2.6 0.0006274999999999999 1 AML other m 2021-11-17T01:48:28.28
IV.MURB.HNN. ML:2.6 0.0005695 0.98 AML other m 2021-11-17T01:48:28.30
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