Earthquake with magnitude of ML 1.6 on date 24-10-2021 and time 08:01:26 (Italy) in region 2 km E Ponsacco (PI)

A magnitude ML 1.6 earthquake occured in region: 2 km E Ponsacco (PI), on

  • 24-10-2021 06:01:26 (UTC)
  • 24-10-2021 08:01:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.618, 10.659 at 6 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
Ponsacco PI 2 15611 15611
Capannoli PI 4 6381 21992
Pontedera PI 6 29223 51215
Calcinaia PI 8 12439 63654
Crespina Lorenzana PI 9 5457 69111
Peccioli PI 9 4807 73918
Palaia PI 9 4612 78530
Santa Maria a Monte PI 10 13253 91783
Montopoli in Val d'Arno PI 10 11148 102931
Terricciola PI 10 4627 107558
Casciana Terme Lari PI 11 12529 120087
Bientina PI 11 8062 128149
Cascina PI 11 45257 173406
Vicopisano PI 11 8559 181965
Castelfranco di Sotto PI 12 13427 195392
Fauglia PI 13 3682 199074
Buti PI 14 5791 204865
Santa Croce sull'Arno PI 14 14601 219466
Chianni PI 15 1392 220858
Collesalvetti LI 15 16827 237685
Calci PI 17 6426 244111
Lajatico PI 17 1336 245447
San Miniato PI 17 27934 273381
Fucecchio FI 18 23618 296999
Santa Luce PI 18 1684 298683
Orciano Pisano PI 18 647 299330

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km E of Pisa (89158 inhabitants)
28 Km SE of Lucca (89046 inhabitants)
29 Km E of Livorno (159219 inhabitants)
41 Km SW of Pistoia (90315 inhabitants)
43 Km SE of Viareggio (62467 inhabitants)
45 Km W of Scandicci (50609 inhabitants)
46 Km SW of Prato (191150 inhabitants)
51 Km W of Firenze (382808 inhabitants)
62 Km SE of Massa (69479 inhabitants)
64 Km NW of Siena (53903 inhabitants)
68 Km SE of Carrara (63133 inhabitants)
86 Km SE of La Spezia (93959 inhabitants)
Recent and historical seismicity
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 the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.6 2021-10-24
06:01:26
43.6177 10.6587 6 2021-10-24
06:40:57
Sala Sismica INGV-Roma 96933681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-24 06:01:26 ± 0.1
Latitude 43.6177 ± 0.0045
Longitude 10.6587 ± 0.0087
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96933681

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 585
Semi-minor axis of confidence ellipse (meter) 410
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 249
Circular confidence region, given by single value of horizontal uncertainty (meter) 590
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 137
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.6583
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 96933681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-24 06:40:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PAOL.HHZ. 2021-10-24T06:03:12.26 3.0 undecidable manual Sn -0.6 0
IV.GIB.HHZ. 2021-10-24T06:03:03.79 3.0 positive manual Pn 6.19 0
IV.CDRU.HHZ. 2021-10-24T06:02:52.43 3.0 undecidable manual Pg 15.44 0
IV.GIUL.HHZ. 2021-10-24T06:02:44.91 3.0 undecidable manual Sn -1.71 0
IV.CMPR.HHZ. 2021-10-24T06:02:41.54 3.0 undecidable manual Pn 2.93 0
IV.PAOL.HHZ. 2021-10-24T06:02:34.42 3.0 undecidable manual Pg 8.14 0
OT.OT11.EHZ. 2021-10-24T06:02:32.98 3.0 positive manual Pn 4.43 0
IV.VAGA.HNZ. 2021-10-24T06:02:28.25 3.0 undecidable manual Pg 8.05 0
IV.SRES.HHZ. 2021-10-24T06:02:27.06 3.0 undecidable manual Sn 1.8 0
IV.GIUL.HHZ. 2021-10-24T06:02:16.95 3.0 undecidable manual Pg 5.41 0
IV.MNTV.EHZ. 2021-10-24T06:01:52.76 3.0 negative manual P -1.21 0
GU.EQUI.HHZ. 2021-10-24T06:01:49.64 0.6 undecidable manual S 327 0.6583 50 0.01 46
IV.FROS.CHZ. 2021-10-24T06:01:46.83 0.3 undecidable manual S 138 0.545 50 0.56 63
IV.CSNT.HHZ. 2021-10-24T06:01:43.50 0.3 undecidable manual S 107 0.4793 50 -0.84 57
IV.BDI.HHZ. 2021-10-24T06:01:43.14 0.6 undecidable manual S 354 0.447 50 -0.24 46
GU.CARD.HHZ. 2021-10-24T06:01:42.67 0.6 undecidable manual S 343 0.4272 50 -0.13 48
GU.POPM.HHZ. 2021-10-24T06:01:42.85 0.6 undecidable manual S 9 0.4326 50 -0.11 48
IV.OSSC.HHE. 2021-10-24T06:01:42.67 0.3 undecidable manual S 102 0.4353 50 -0.36 68
GU.EQUI.HHZ. 2021-10-24T06:01:40.35 0.6 undecidable manual P 327 0.6583 50 0.45 42
IV.MAGO.CHZ. 2021-10-24T06:01:39.70 0.3 undecidable manual S 180 0.3444 99 -0.35 69
GU.MAIM.HHZ. 2021-10-24T06:01:39.01 0.6 undecidable manual S 338 0.3193 100 -0.08 49
IV.CRMI.HHZ. 2021-10-24T06:01:38.22 0.3 undecidable manual S 52 0.2923 101 0.14 73
IV.TRIF.CHN. 2021-10-24T06:01:38.68 0.3 undecidable manual P 160 0.5333 50 0.92 54
IV.FROS.CHZ. 2021-10-24T06:01:38.00 0.3 undecidable manual P 138 0.545 50 0.04 71
IV.BDI.HHZ. 2021-10-24T06:01:36.31 0.3 undecidable manual P 354 0.447 50 0.02 73
IV.OSSC.HHE. 2021-10-24T06:01:36.02 0.3 undecidable manual P 102 0.4353 50 -0.07 72
IV.CSNT.HHZ. 2021-10-24T06:01:36.59 0.3 undecidable manual P 107 0.4793 50 -0.26 69
GU.CARD.HHZ. 2021-10-24T06:01:36.29 0.3 undecidable manual P 343 0.4272 50 0.33 68
GU.POPM.HHZ. 2021-10-24T06:01:36.14 0.3 undecidable manual P 9 0.4326 50 0.09 72
IV.MAGO.CHZ. 2021-10-24T06:01:34.36 0.1 undecidable manual P 180 0.3444 99 -0.01 99
GU.MAIM.HHZ. 2021-10-24T06:01:33.74 0.3 undecidable manual P 338 0.3193 100 -0.08 74
IV.CRMI.HHZ. 2021-10-24T06:01:33.63 0.1 undecidable manual P 52 0.2923 101 0.4 92
IV.PII.HHZ. 2021-10-24T06:01:32.30 0.3 undecidable manual S 317 0.1421 112 -0.21 74
IV.PII.HHZ. 2021-10-24T06:01:29.86 0.1 undecidable manual P 317 0.1421 112 -0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PII.HHN. ML:1.8 0.000695 0.82 AML other m 2021-10-24T06:01:33.49
IV.PII.HHE. ML:1.8 0.0006745 0.86 AML other m 2021-10-24T06:01:33.27
IV.CRMI.HNN. ML:1.8 0.000276 0.42 AML other m 2021-10-24T06:01:37.26
IV.CRMI.HHN. ML:1.4 0.000126 0.84 AML other m 2021-10-24T06:01:38.14
IV.CRMI.HNE. ML:1.7 0.000213 1.68 AML other m 2021-10-24T06:01:38.98
IV.CRMI.HHE. ML:1.5 0.000141 0.3 AML other m 2021-10-24T06:01:39.13
GU.MAIM.HHE. ML:1.3 7.99E-5 0.54 AML other m 2021-10-24T06:01:39.68
GU.MAIM.HHN. ML:1.3 8.855E-5 0.96 AML other m 2021-10-24T06:01:40.77
IV.MAGO.CHN. ML:1.7 0.0001865 1.12 AML other m 2021-10-24T06:01:40.96
IV.MAGO.CHE. ML:1.6 0.000137 0.6 AML other m 2021-10-24T06:01:41.35
IV.CSNT.HHN. ML:1.4 6.03E-5 0.22 AML other m 2021-10-24T06:01:44.14
GU.CARD.HHN. ML:1.6 0.00010265 0.38 AML other m 2021-10-24T06:01:44.45
IV.BDI.HHN. ML:1.4 6.77E-5 0.38 AML other m 2021-10-24T06:01:44.29
GU.CARD.HHE. ML:1.7 0.0001405 0.84 AML other m 2021-10-24T06:01:44.52
IV.CSNT.HHE. ML:1.4 5.375E-5 1.12 AML other m 2021-10-24T06:01:44.19
GU.POPM.HHN. ML:1.9 0.000206 0.28 AML other m 2021-10-24T06:01:44.83
GU.POPM.HHE. ML:1.7 0.000145 0.38 AML other m 2021-10-24T06:01:45.16
IV.BDI.HHE. ML:1.4 7.66E-5 0.32 AML other m 2021-10-24T06:01:48.46
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