Earthquake with magnitude of ML 0.3 on date 16-10-2022 and time 23:01:04 (UTC) in region 1 km W Porcari (LU)

A magnitude ML 0.3 earthquake occured in region: 1 km W Porcari (LU), on

  • 16-10-2022 23:01:04 (UTC)
  • 17-10-2022 01:01:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.8400, 10.6090 at 5 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
Porcari LU 1 8845 8845
Capannori LU 3 46252 55097
Montecarlo LU 5 4428 59525
Altopascio LU 6 15481 75006
Lucca LU 9 89046 164052
Chiesina Uzzanese PT 9 4552 168604
Uzzano PT 9 5770 174374
Pescia PT 10 19644 194018
Villa Basilica LU 10 1633 195651
Buggiano PT 11 8825 204476
Ponte Buggianese PT 11 8804 213280
Buti PI 13 5791 219071
Massa e Cozzile PT 14 7983 227054
Montecatini-Terme PT 14 20409 247463
Bientina PI 14 8062 255525
Calci PI 15 6426 261951
Pieve a Nievole PT 16 9266 271217
Vicopisano PI 16 8559 279776
San Giuliano Terme PI 16 31399 311175
Borgo a Mozzano LU 16 6994 318169
Marliana PT 17 3210 321379
Monsummano Terme PT 17 21338 342717
Santa Maria a Monte PI 17 13253 355970
Calcinaia PI 17 12439 368409
Cascina PI 19 45257 413666
Vecchiano PI 19 12189 425855
Castelfranco di Sotto PI 19 13427 439282
Bagni di Lucca LU 19 6161 445443
Serravalle Pistoiese PT 19 11659 457102
Pontedera PI 20 29223 486325
Santa Croce sull'Arno PI 20 14601 500926

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km E of Lucca (89046 inhabitants)
22 Km NE of Pisa (89158 inhabitants)
27 Km W of Pistoia (90315 inhabitants)
29 Km E of Viareggio (62467 inhabitants)
40 Km W of Prato (191150 inhabitants)
40 Km NE of Livorno (159219 inhabitants)
43 Km SE of Massa (69479 inhabitants)
47 Km W of Scandicci (50609 inhabitants)
49 Km SE of Carrara (63133 inhabitants)
53 Km W of Firenze (382808 inhabitants)
69 Km E of La Spezia (93959 inhabitants)
82 Km NW of Siena (53903 inhabitants)
93 Km S of Modena (184973 inhabitants)
94 Km SW of Bologna (386663 inhabitants)
96 Km S of Reggio nell'Emilia (171345 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 0.3 2022-10-16
23:01:04
43.8398 10.6092 5 2022-10-16
23:17:49
Sala Sismica INGV-Roma 110892141
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-10-16 23:01:04 ± 0.14
Latitude 43.8398 ± 0.0045
Longitude 10.6092 ± 0.0125
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 110892141

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 970
Semi-minor axis of confidence ellipse (meter) 480
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 280
Circular confidence region, given by single value of horizontal uncertainty (meter) 970.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 180
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
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) 0.11242
Epicentral distance of station farthest from the epicenter (degree) 0.23113
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

ML:0.3

Field Value
Value 0.3
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 110892141
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-10-16 23:17:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.BDI.HHZ. 2022-10-16T23:01:13.17 0.6 undecidable manual S 357 0.2230 101 -0.46 45
IV.PII.HHZ. 2022-10-16T23:01:10.05 0.1 undecidable manual S 207 0.1322 109 -0.21 96
GU.POPM.HHZ. 2022-10-16T23:01:10.16 0.1 undecidable manual P 27 0.2311 101 0.06 98
IV.BDI.HHZ. 2022-10-16T23:01:09.92 0.1 undecidable manual P 357 0.2230 101 0 99
GU.MAIM.HHZ. 2022-10-16T23:01:09.47 0.1 undecidable manual S 311 0.1124 112 -0.05 100
IV.PII.HHZ. 2022-10-16T23:01:08.12 0.1 undecidable manual P 207 0.1322 109 0.14 98
GU.MAIM.HHZ. 2022-10-16T23:01:07.84 0.1 undecidable manual P 311 0.1124 112 0.29 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.MAIM.HHE. ML:0.4 0.000033100000000000005 0.16 AML other m 2022-10-16T23:01:09.84
GU.MAIM.HHN. ML:0.3 0.000023800000000000003 0.12 AML other m 2022-10-16T23:01:09.76
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