Earthquake with magnitude of ML 0.9 on date 20-01-2022 and time 17:55:46 (Italy) in region 4 km NW Santa Croce sull'Arno (PI)

A magnitude ML 0.9 earthquake occured in region: 4 km NW Santa Croce sull'Arno (PI), on

  • 20-01-2022 16:55:46 (UTC)
  • 20-01-2022 17:55:46 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.7410, 10.7450 at 8 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Santa Croce sull'Arno PI 4 14601 14601
Castelfranco di Sotto PI 5 13427 28028
Fucecchio FI 6 23618 51646
Santa Maria a Monte PI 6 13253 64899
Montopoli in Val d'Arno PI 8 11148 76047
Altopascio LU 10 15481 91528
Bientina PI 11 8062 99590
Cerreto Guidi FI 11 10870 110460
San Miniato PI 11 27934 138394
Chiesina Uzzanese PT 11 4552 142946
Ponte Buggianese PT 12 8804 151750
Calcinaia PI 12 12439 164189
Pontedera PI 12 29223 193412
Buti PI 13 5791 199203
Vicopisano PI 14 8559 207762
Montecarlo LU 14 4428 212190
Larciano PT 14 6394 218584
Lamporecchio PT 15 7508 226092
Porcari LU 15 8845 234937
Palaia PI 15 4612 239549
Buggiano PT 16 8825 248374
Vinci FI 16 14604 262978
Monsummano Terme PT 16 21338 284316
Pieve a Nievole PT 16 9266 293582
Uzzano PT 16 5770 299352
Ponsacco PI 16 15611 314963
Montecatini-Terme PT 16 20409 335372
Empoli FI 17 48109 383481
Cascina PI 17 45257 428738
Capannoli PI 18 6381 435119
Capannori LU 18 46252 481371
Calci PI 18 6426 487797
Pescia PT 19 19644 507441
Capraia e Limite FI 19 7670 515111
Massa e Cozzile PT 19 7983 523094
Serravalle Pistoiese PT 20 11659 534753

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SE of Lucca (89046 inhabitants)
26 Km SW of Pistoia (90315 inhabitants)
28 Km E of Pisa (89158 inhabitants)
32 Km W of Prato (191150 inhabitants)
35 Km W of Scandicci (50609 inhabitants)
41 Km NE of Livorno (159219 inhabitants)
41 Km W of Firenze (382808 inhabitants)
42 Km E of Viareggio (62467 inhabitants)
59 Km SE of Massa (69479 inhabitants)
64 Km SE of Carrara (63133 inhabitants)
67 Km NW of Siena (53903 inhabitants)
84 Km E of La Spezia (93959 inhabitants)
97 Km SW of Bologna (386663 inhabitants)
97 Km W 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
Reviewed
Rev100
ML 0.9 2022-01-20
16:55:46
43.7407 10.7447 8 2022-01-20
17:04:15
Sala Sismica INGV-Roma 99987391
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-01-20 16:55:46 ± 0.38
Latitude 43.7407 ± 0.0216
Longitude 10.7447 ± 0.0112
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 99987391

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2444
Semi-minor axis of confidence ellipse (meter) 572
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 194
Circular confidence region, given by single value of horizontal uncertainty (meter) 2440.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 241
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.34264
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.4
Num. used stations 13
Type of magnitude ML
Reference to an origin 99987391
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-01-20 17:04:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EFIU.HHZ. 2022-01-20T16:57:32.57 3.0 undecidable manual Pn 1.52 0
IV.RESU.HHZ. 2022-01-20T16:57:23.29 3.0 undecidable manual Pn -4.16 0
IV.ERC.EHZ. 2022-01-20T16:57:13.93 3.0 undecidable manual Pn -3.52 0
CR.ZAG.BHZ. 2022-01-20T16:57:02.56 3.0 negative manual Pn 6.7 0
IV.VITU.HHZ. 2022-01-20T16:56:57.10 3.0 negative manual Pg 7.08 0
IV.BARO.EHZ. 2022-01-20T16:56:45.68 3.0 undecidable manual Sg -1.03 0
GU.CIRO.HHZ. 2022-01-20T16:56:38.14 3.0 undecidable manual Pn 1.76 0
IT.RMVT.HGZ. 2022-01-20T16:56:25.83 3.0 undecidable manual Pg -1.44 0
IV.CRTC.HHZ. 2022-01-20T16:56:16.33 3.0 positive manual Pg -2.24 0
IV.BDI.HHZ. 2022-01-20T16:56:00.03 0.6 undecidable manual S 342 0.3390 50 -0.1 65
GU.CARD.HHE. 2022-01-20T16:55:59.79 0.6 undecidable manual S 327 0.3426 50 -0.43 61
GU.POPM.HHZ. 2022-01-20T16:55:59.44 0.6 undecidable manual S 2 0.3040 103 0.53 61
GU.MAIM.HHZ. 2022-01-20T16:55:56.74 0.6 undecidable manual S 313 0.2509 106 -0.18 61
GU.POPM.HHZ. 2022-01-20T16:55:54.19 0.6 undecidable manual P 2 0.3040 103 0.37 61
IV.CRMI.HHZ. 2022-01-20T16:55:54.25 0.6 undecidable manual S 72 0.1781 111 -0.01 66
IV.BDI.HHZ. 2022-01-20T16:55:54.72 1.0 negative manual P 342 0.3390 50 0.19 31
GU.CARD.HHE. 2022-01-20T16:55:54.88 0.6 undecidable manual P 327 0.3426 50 0.3 60
IV.MPPT.EHN. 2022-01-20T16:55:53.98 0.6 undecidable manual P 49 0.3301 50 -0.4 62
GU.MAIM.HHZ. 2022-01-20T16:55:52.86 0.6 negative manual P 313 0.2509 106 0.18 65
IV.CRMI.HHZ. 2022-01-20T16:55:51.08 0.3 undecidable manual P 72 0.1781 111 -0.06 100
IV.PII.HHZ. 2022-01-20T16:55:50.62 3.0 undecidable manual P -1.04 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PII.HHN. ML:1.2 0.00014256784999999998 0.1024 AML other m 2022-01-20T16:55:53.09
IV.PII.HHE. ML:1.3 0.00016261545 0.1536 AML other m 2022-01-20T16:55:53.08
IV.CRMI.HNN. ML:1.4 0.00018983809499999998 1.1392 AML other m 2022-01-20T16:55:53.50
IV.CRMI.HHE. ML:0.3 0.000015090335 0.256 AML other m 2022-01-20T16:55:55.07
IV.CRMI.HHN. ML:0.7 0.00004010099 0.3712 AML other m 2022-01-20T16:55:54.25
GU.MAIM.HHE. ML:0.6 0.000020026785 0.896 AML other m 2022-01-20T16:56:03.46
GU.MAIM.HHN. ML:0.4 0.000017188047 0.7424 AML other m 2022-01-20T16:55:55.21
GU.POPM.HHE. ML:0.8 0.000030936659999999995 0.1792 AML other m 2022-01-20T16:56:01.16
GU.POPM.HHN. ML:0.9 0.000035222235000000005 0.1408 AML other m 2022-01-20T16:55:59.46
IV.BDI.HNE. ML:1.5 0.00011091990000000001 0.704 AML other m 2022-01-20T16:56:09.46
IV.BDI.HNN. ML:1.5 0.000121559945 1.2032 AML other m 2022-01-20T16:56:10.82
IV.BDI.HHE. ML:0.7 0.00002045647 1.1008 AML other m 2022-01-20T16:55:55.03
IV.BDI.HHN. ML:0.8 0.000024062408 0.8576 AML other m 2022-01-20T16:56:11.65
IV.CRTC.HNE. ML:4.3 0.00826963 1.1648 AML other m 2022-01-20T16:57:04.63
IV.CRTC.HNN. ML:4.2 0.006371892 0.4864 AML other m 2022-01-20T16:56:52.69
IV.CRTC.HHE. ML:2.5 0.00012244289999999999 1.4336 AML other m 2022-01-20T16:57:03.55
IV.CRTC.HHN. ML:2.7 0.00018992615 0.9088 AML other m 2022-01-20T16:56:26.29
IT.RMVT.HGE. ML:5.0 0.02016892 0.0512 AML other m 2022-01-20T16:56:26.22
IT.RMVT.HGN. ML:4.9 0.0171684815 0.0896 AML other m 2022-01-20T16:56:27.58
GU.CIRO.HHE. ML:2.2 0.000015335681 1.4336 AML other m 2022-01-20T16:57:17.18
GU.CIRO.HHN. ML:1.7 0.000007474349499999999 1.0496 AML other m 2022-01-20T16:57:11.48
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