Earthquake with magnitude of ML 1.2 on date 22-10-2021 and time 09:05:06 (UTC) in region 1 km E Ponsacco (PI)

A magnitude ML 1.2 earthquake occured in region: 1 km E Ponsacco (PI), on

  • 22-10-2021 09:05:06 (UTC)
  • 22-10-2021 11:05:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.624, 10.652 at 10 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 1 15611 15611
Pontedera PI 5 29223 44834
Capannoli PI 5 6381 51215
Calcinaia PI 7 12439 63654
Crespina Lorenzana PI 9 5457 69111
Santa Maria a Monte PI 9 13253 82364
Bientina PI 10 8062 90426
Palaia PI 10 4612 95038
Vicopisano PI 10 8559 103597
Montopoli in Val d'Arno PI 10 11148 114745
Peccioli PI 10 4807 119552
Cascina PI 10 45257 164809
Terricciola PI 11 4627 169436
Casciana Terme Lari PI 11 12529 181965
Castelfranco di Sotto PI 11 13427 195392
Buti PI 13 5791 201183
Fauglia PI 13 3682 204865
Santa Croce sull'Arno PI 14 14601 219466
Collesalvetti LI 15 16827 236293
Chianni PI 15 1392 237685
Calci PI 16 6426 244111
Fucecchio FI 17 23618 267729
San Miniato PI 17 27934 295663
Lajatico PI 18 1336 296999
Santa Luce PI 18 1684 298683
Orciano Pisano PI 19 647 299330

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km E of Pisa (89158 inhabitants)
27 Km SE of Lucca (89046 inhabitants)
29 Km E of Livorno (159219 inhabitants)
41 Km SW of Pistoia (90315 inhabitants)
42 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)
65 Km NW of Siena (53903 inhabitants)
67 Km SE of Carrara (63133 inhabitants)
85 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 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
Reviewed
Rev100
ML 1.2 2021-10-22
09:05:06
43.6245 10.652 10 2021-10-22
09:11:35
Sala Sismica INGV-Roma 96871271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-22 09:05:06 ± 0.09
Latitude 43.6245 ± 0.0045
Longitude 10.6520 ± 0.0099
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96871271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 825
Semi-minor axis of confidence ellipse (meter) 461
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 254
Circular confidence region, given by single value of horizontal uncertainty (meter) 820
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 138
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.55308
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 96871271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-22 09:11:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OT.OT05.EHZ. 2021-10-22T09:07:01.57 3.0 undecidable manual Sn 3.81 0
IV.TST01.HHZ. 2021-10-22T09:06:47.45 3.0 undecidable manual Sg 9.61 0
RF.GEPF.HHZ. 2021-10-22T09:06:46.67 3.0 undecidable manual Sg 11.43 0
IV.GRIS.EHZ. 2021-10-22T09:06:39.06 3.0 undecidable manual Pg 11.45 0
IV.MILZ.HHZ. 2021-10-22T09:06:38.18 3.0 undecidable manual Pn -1.54 0
OX.MPRI.HHZ. 2021-10-22T09:06:31.70 3.0 undecidable manual Sn -1.46 0
IX.NSC3.EHZ.02 2021-10-22T09:06:21.96 3.0 undecidable manual Pg 10.47 0
IX.RSF3.HHZ.02 2021-10-22T09:06:17.40 3.0 positive manual Pn 6.54 0
OT.OT17.EHZ. 2021-10-22T09:06:17.18 3.0 positive manual Pg 10.47 0
IV.ACER.HHZ. 2021-10-22T09:06:16.76 3.0 positive manual Pn -1.85 0
OT.OT05.EHZ. 2021-10-22T09:06:07.26 3.0 negative manual Pn -1.72 0
IV.GIUL.HHZ. 2021-10-22T09:05:57.39 3.0 positive manual Pg 6.53 0
IV.ARVD.HHZ. 2021-10-22T09:05:55.82 3.0 undecidable manual Sn -1.37 0
OX.MPRI.HHZ. 2021-10-22T09:05:53.67 3.0 undecidable manual Pn -1.49 0
IV.CTI.HHZ. 2021-10-22T09:05:52.29 3.0 positive manual Pg 4.76 0
IV.ARRO.EHZ. 2021-10-22T09:05:37.60 3.0 undecidable manual Pg -0.1 0
IV.CSNT.HHE. 2021-10-22T09:05:23.84 0.6 undecidable manual S 108 0.4865 50 -0.19 46
IV.OSSC.HHN. 2021-10-22T09:05:23.00 0.6 undecidable manual S 103 0.4416 50 0.3 45
GU.POPM.HHZ. 2021-10-22T09:05:22.33 0.6 undecidable manual S 10 0.4272 50 0.06 48
IV.TRIF.CHE. 2021-10-22T09:05:18.24 0.1 undecidable manual P 160 0.5414 50 0.5 85
IV.CRMI.HHZ. 2021-10-22T09:05:18.28 0.6 undecidable manual S 54 0.2923 50 0.01 49
GU.MAIM.HHZ. 2021-10-22T09:05:18.77 0.6 undecidable manual S 338 0.3112 50 -0.06 49
IV.FROS.CHN. 2021-10-22T09:05:17.88 0.1 undecidable manual P 138 0.5531 50 -0.06 93
IV.OSSC.HHN. 2021-10-22T09:05:16.03 0.1 undecidable manual P 103 0.4416 50 -0.01 96
IV.CSNT.HHE. 2021-10-22T09:05:16.51 0.1 undecidable manual P 108 0.4865 50 -0.29 90
GU.POPM.HHZ. 2021-10-22T09:05:15.84 0.6 positive manual P 10 0.4272 50 0.05 48
IV.MAGO.CHZ. 2021-10-22T09:05:14.23 0.1 undecidable manual P 179 0.3507 50 -0.26 93
IV.CRMI.HHZ. 2021-10-22T09:05:13.63 1.0 positive manual P 54 0.2923 50 0.15 24
GU.MAIM.HHZ. 2021-10-22T09:05:13.76 1.0 negative manual P 338 0.3112 50 -0.04 24
IV.PII.HHZ. 2021-10-22T09:05:13.04 0.6 undecidable manual S 317 0.134 124 -0.12 50
IV.PII.HHZ. 2021-10-22T09:05:10.62 0.1 positive manual P 317 0.134 124 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PII.HHE. ML:1.4 0.000264 0.42 AML other m 2021-10-22T09:05:12.99
IV.PII.HHN. ML:1.6 0.000387 0.82 AML other m 2021-10-22T09:05:13.68
GU.MAIM.HHE. ML:1 4.36E-5 0.52 AML other m 2021-10-22T09:05:19.15
GU.POPM.HHE. ML:1.4 7.65E-5 0.68 AML other m 2021-10-22T09:05:23.04
GU.POPM.HHN. ML:1.4 7.605E-5 1.54 AML other m 2021-10-22T09:05:23.07
GU.MAIM.HHN. ML:1 4.1573845E-5 0.1216 AML other m 2021-10-22T09:05:19.01
IV.CRMI.HHE. ML:0.8 2.8633715E-5 0.3392 AML other m 2021-10-22T09:05:19.92
IV.CRMI.HHN. ML:1 4.392082E-5 0.256 AML other m 2021-10-22T09:05:18.28
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