Earthquake with magnitude of ML 1.2 on date 28-11-2020 and time 03:56:40 (Italy) in region 1 km W Calcinaia (PI)

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

  • 28-11-2020 02:56:40 (UTC)
  • 28-11-2020 03:56:40 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.68, 10.6 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
Calcinaia PI 1 12439 12439
Vicopisano PI 3 8559 20998
Pontedera PI 3 29223 50221
Bientina PI 4 8062 58283
Cascina PI 4 45257 103540
Buti PI 5 5791 109331
Ponsacco PI 7 15611 124942
Santa Maria a Monte PI 8 13253 138195
Calci PI 9 6426 144621
Castelfranco di Sotto PI 12 13427 158048
Crespina Lorenzana PI 12 5457 163505
Capannoli PI 12 6381 169886
Montopoli in Val d'Arno PI 13 11148 181034
Collesalvetti LI 14 16827 197861
Fauglia PI 14 3682 201543
Santa Croce sull'Arno PI 15 14601 216144
San Giuliano Terme PI 16 31399 247543
Palaia PI 16 4612 252155
Altopascio LU 16 15481 267636
Pisa PI 17 89158 356794
Casciana Terme Lari PI 17 12529 369323
Peccioli PI 17 4807 374130
Fucecchio FI 18 23618 397748
Porcari LU 18 8845 406593
Terricciola PI 18 4627 411220
Capannori LU 19 46252 457472
Montecarlo LU 20 4428 461900
Lucca LU 20 89046 550946
Chiesina Uzzanese PT 20 4552 555498

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km E of Pisa (89158 inhabitants)
20 Km SE of Lucca (89046 inhabitants)
28 Km NE of Livorno (159219 inhabitants)
35 Km SE of Viareggio (62467 inhabitants)
38 Km SW of Pistoia (90315 inhabitants)
46 Km W of Prato (191150 inhabitants)
47 Km W of Scandicci (50609 inhabitants)
53 Km W of Firenze (382808 inhabitants)
54 Km SE of Massa (69479 inhabitants)
60 Km SE of Carrara (63133 inhabitants)
71 Km NW of Siena (53903 inhabitants)
78 Km SE of La Spezia (93959 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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 1.2 2020-11-28
02:56:40
43.68 10.6 10 2020-11-28
03:29:29
Sala Sismica INGV-Roma 85060011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-28 02:56:40 ± 0.12
Latitude 43.68 ± 0.01
Longitude 10.60 ± 0.01
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 85060011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 901
Semi-minor axis of confidence ellipse (meter) 627
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 257
Circular confidence region, given by single value of horizontal uncertainty (meter) 900
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 131
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
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) 0.07105
Epicentral distance of station farthest from the epicenter (degree) 0.67179
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.4
Num. used stations 11
Type of magnitude ML
Reference to an origin 85060011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-28 03:29:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MPPT.EHE. 2020-11-28T02:56:55.66 0.3 undecidable manual S 52 0.4461 50 -0.33 66
IV.MAGO.CHZ. 2020-11-28T02:56:54.38 0.3 undecidable manual S 175 0.4092 50 -0.5 64
IV.BDI.HHZ. 2020-11-28T02:56:54.12 0.3 undecidable manual S 359 0.3822 50 0.04 71
GU.CARD.HHZ. 2020-11-28T02:56:53.09 0.6 undecidable manual S 346 0.3561 50 -0.22 46
IV.RUFI.EHZ. 2020-11-28T02:56:53.81 0.1 undecidable manual P 76 0.6718 50 0.68 76
GU.POPM.HHZ. 2020-11-28T02:56:53.79 0.6 undecidable manual S 17 0.3804 50 -0.24 46
IV.CRMI.HHZ. 2020-11-28T02:56:51.27 0.3 undecidable manual S 67 0.2941 50 -0.21 70
GU.MAIM.HHE. 2020-11-28T02:56:50.10 0.6 undecidable manual S 341 0.2473 50 0.02 49
IV.MPPT.EHE. 2020-11-28T02:56:48.86 0.1 undecidable manual P 52 0.4461 50 -0.41 87
IV.BDI.HHZ. 2020-11-28T02:56:48.31 0.1 undecidable manual P 359 0.3822 50 0.14 93
IV.MAGO.CHZ. 2020-11-28T02:56:48.89 0.1 undecidable manual P 175 0.4092 50 0.26 90
GU.POPM.HHZ. 2020-11-28T02:56:48.39 0.1 undecidable manual P 17 0.3804 50 0.25 91
GU.CARD.HHZ. 2020-11-28T02:56:47.98 0.1 undecidable manual P 346 0.3561 50 0.25 91
IV.CRMI.HHZ. 2020-11-28T02:56:46.77 0.1 undecidable manual P 67 0.2941 50 0.1 95
GU.MAIM.HHE. 2020-11-28T02:56:45.81 0.1 undecidable manual P 341 0.2473 50 -0.05 97
IV.PII.HHZ. 2020-11-28T02:56:44.17 0.3 undecidable manual S 306 0.071 142 -0.37 71
IV.PII.HHZ. 2020-11-28T02:56:42.74 0.1 negative manual P 306 0.071 142 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PII.HHE. ML:2 0.001355 0.22 AML other m 2020-11-28T02:56:46.82
IV.PII.HHN. ML:2 0.001605 0.54 AML other m 2020-11-28T02:56:48.00
GU.POPM.HHN. ML:1.3 5.935E-5 0.74 AML other m 2020-11-28T02:56:56.09
GU.CARD.HHE. ML:1.3 7.29E-5 0.42 AML other m 2020-11-28T02:56:56.58
GU.CARD.HHN. ML:1.4 8.125E-5 1.46 AML other m 2020-11-28T02:56:57.08
GU.POPM.HHE. ML:1.2 5.61E-5 0.42 AML other m 2020-11-28T02:57:00.48
IV.CRMI.HNN. ML:1 4.044641E-5 0.3184 AML other m 2020-11-28T02:56:53.39
IV.CRMI.HHE. ML:0.5 1.5254175E-5 0.5792 AML other m 2020-11-28T02:56:53.39
IV.CRMI.HHN. ML:0.5 1.6672121E-5 0.3184 AML other m 2020-11-28T02:56:53.39
IV.BDI.HHE. ML:1 3.6292245E-5 0.3408 AML other m 2020-11-28T02:56:59.47
IV.BDI.HHN. ML:1.2 4.368283E-5 2.6208 AML other m 2020-11-28T02:57:03.93
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download