Earthquake with magnitude of ML 1.2 on date 24-07-2020 and time 01:22:30 (Italy) in region 4 km E Lajatico (PI)

A magnitude ML 1.2 earthquake occured in region: 4 km E Lajatico (PI), on

  • 23-07-2020 23:22:30 (UTC)
  • 24-07-2020 01:22:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.46, 10.77 at 1 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
Lajatico PI 4 1336 1336
Montecatini Val di Cecina PI 8 1749 3085
Volterra PI 10 10519 13604
Peccioli PI 10 4807 18411
Terricciola PI 10 4627 23038
Chianni PI 11 1392 24430
Casciana Terme Lari PI 14 12529 36959
Montaione FI 15 3700 40659
Capannoli PI 15 6381 47040
Palaia PI 16 4612 51652
Gambassi Terme FI 17 4870 56522
Santa Luce PI 17 1684 58206
Castellina Marittima PI 17 2025 60231
Riparbella PI 18 1603 61834
Montescudaio PI 19 2144 63978
Pomarance PI 20 5897 69875

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km E of Livorno (159219 inhabitants)
41 Km SE of Pisa (89158 inhabitants)
46 Km SW of Scandicci (50609 inhabitants)
48 Km SE of Lucca (89046 inhabitants)
48 Km W of Siena (53903 inhabitants)
52 Km SW of Firenze (382808 inhabitants)
53 Km SW of Prato (191150 inhabitants)
54 Km S of Pistoia (90315 inhabitants)
62 Km SE of Viareggio (62467 inhabitants)
82 Km SE of Massa (69479 inhabitants)
83 Km NW of Grosseto (82087 inhabitants)
87 Km SE of Carrara (63133 inhabitants)
90 Km W of Arezzo (99543 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 2020-07-23
23:22:30
43.46 10.77 1 2020-07-23
23:30:32
Sala Sismica INGV-Roma 81287791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-23 23:22:30 ± 0.17
Latitude 43.46 ± 0.01
Longitude 10.77 ± 0.01
Depth (km) 1 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81287791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1089
Semi-minor axis of confidence ellipse (meter) 205
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 77
Circular confidence region, given by single value of horizontal uncertainty (meter) 1090
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 121
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.67629
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 81287791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-23 23:30:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SLCN.HHZ. 2020-07-23T23:24:43.92 3.0 undecidable manual Sn 3.97 0
IV.MESG.HHZ. 2020-07-23T23:24:18.26 3.0 positive manual Pg 17.68 0
IV.ROSPO.HHZ. 2020-07-23T23:24:08.36 3.0 undecidable manual Sn 3.96 0
IV.CMPR.HHZ. 2020-07-23T23:23:57.44 3.0 undecidable manual Pg 15.99 0
IV.SLCN.HHZ. 2020-07-23T23:23:54.18 3.0 undecidable manual Pg 10.87 0
IV.ROSPO.HHZ. 2020-07-23T23:23:31.26 3.0 positive manual Pg 7.92 0
IV.CRTC.HHZ. 2020-07-23T23:23:22.65 3.0 undecidable manual S 0.6 0
IV.CTI.HHZ. 2020-07-23T23:23:13.87 3.0 undecidable manual Pn -0.51 0
IV.EUCT.HNZ. 2020-07-23T23:23:05.94 3.0 undecidable manual Pn -0.55 0
IV.CASP.HHZ. 2020-07-23T23:22:55.30 1.0 undecidable manual S 174 0.6763 50 0.19 23
IV.CASP.HHZ. 2020-07-23T23:22:45.01 1.0 negative manual P 174 0.6763 50 0.38 22
IV.CSNT.HHZ. 2020-07-23T23:22:44.71 0.6 undecidable manual S 88 0.3741 91 -0.01 51
IV.BDI.HHZ. 2020-07-23T23:22:43.23 0.1 undecidable manual P 348 0.6115 50 -0.29 92
GU.POPM.HHZ. 2020-07-23T23:22:43.18 0.6 negative manual P 359 0.5801 50 0.2 47
IV.TRIF.CHZ. 2020-07-23T23:22:43.30 0.3 undecidable manual S 165 0.3615 91 -0.94 58
IV.PII.HHZ. 2020-07-23T23:22:41.87 0.3 undecidable manual S 325 0.3148 91 -0.55 69
IV.CSNT.HHZ. 2020-07-23T23:22:39.27 0.6 positive manual P 88 0.3741 91 0.64 44
IV.TRIF.CHZ. 2020-07-23T23:22:38.22 0.1 undecidable manual P 165 0.3615 91 -0.13 100
IV.MAGO.CHZ. 2020-07-23T23:22:38.52 0.3 undecidable manual S 204 0.2086 92 0.17 77
IV.PII.HHZ. 2020-07-23T23:22:37.64 0.1 positive manual P 325 0.3148 91 0.34 97
IV.MAGO.CHZ. 2020-07-23T23:22:35.30 0.1 positive manual P 204 0.2086 92 0.35 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MAGO.CHE. ML:1.6 0.000307 0.22 AML other m 2020-07-23T23:22:40.65
IV.MAGO.CHN. ML:1.6 0.0002925 0.26 AML other m 2020-07-23T23:22:40.62
IV.PII.HHN. ML:1.2 6.6E-5 0.32 AML other m 2020-07-23T23:22:42.87
IV.PII.HHE. ML:1.2 7.445E-5 0.5 AML other m 2020-07-23T23:22:43.25
IV.TRIF.CHE. ML:1.2 4.805E-5 1.02 AML other m 2020-07-23T23:22:43.95
IV.TRIF.CHN. ML:1 4.18E-5 1.1 AML other m 2020-07-23T23:22:44.64
IV.CSNT.HHE. ML:0.6 1.325E-5 0.6 AML other m 2020-07-23T23:22:45.91
IV.CSNT.HHN. ML:0.8 1.935E-5 1.46 AML other m 2020-07-23T23:22:46.73
GU.POPM.HHN. ML:1.1 2.64E-5 0.84 AML other m 2020-07-23T23:22:53.35
GU.POPM.HHE. ML:0.9 1.745E-5 1.1 AML other m 2020-07-23T23:22:54.06
IV.CASP.HHN. ML:1.6 5.55E-5 1.62 AML other m 2020-07-23T23:22:55.96
IV.CASP.HHE. ML:1.3 2.85E-5 0.82 AML other m 2020-07-23T23:22:57.49
IV.CRTC.HHE. ML:2.1 5.155E-5 1.24 AML other m 2020-07-23T23:23:33.86
IV.CRTC.HHN. ML:2.2 5.955E-5 0.06 AML other m 2020-07-23T23:23:35.35
IV.CTI.HHE. ML:2.9 0.000107 0.14 AML other m 2020-07-23T23:24:09.28
IV.CTI.HHN. ML:3 0.000129 0.18 AML other m 2020-07-23T23:24:09.30
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