ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of ML 1.7 on date 24-02-2019 and time 20:57:58 (Italy) in region Costa Toscana settentrionale (Massa Carrara, Lucca, Pisa)

A magnitude ML 1.7 earthquake occured in region: Costa Toscana settentrionale (Massa Carrara, Lucca, Pisa), on

  • 24-02-2019 19:57:58 (UTC)
  • 24-02-2019 20:57:58 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.76, 10.04 at 2 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km SW of Viareggio (62467 inhabitants)
30 Km W of Pisa (89158 inhabitants)
32 Km NW of Livorno (159219 inhabitants)
32 Km S of Massa (69479 inhabitants)
36 Km S of Carrara (63133 inhabitants)
38 Km W of Lucca (89046 inhabitants)
42 Km SE of La Spezia (93959 inhabitants)
73 Km W of Pistoia (90315 inhabitants)
86 Km W of Prato (191150 inhabitants)
92 Km W of Scandicci (50609 inhabitants)
98 Km W of Firenze (382808 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
Rev 100 ML 1.7 2019-02-24
19:57:58
43.76 10.04 2 2019-02-24
20:15:51
Sala Sismica INGV-Roma 65924711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-02-24 19:57:58 ± 0.14
Latitude 43.76 ± 0.01
Longitude 10.04 ± 0.01
Depth (km) 2 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 65924711

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 500
Semi-minor axis of confidence ellipse (meter) 448
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 29
Circular confidence region, given by single value of horizontal uncertainty (meter) 500
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 153
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.02073
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 65924711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-02-24 20:15:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.CANO.HHZ. 2019-02-24T19:58:48.56 3.0 undecidable manual S 2.66 0
IV.MNTV.HNZ. 2019-02-24T19:58:48.43 3.0 undecidable manual S -0.05 0
IV.CIMA.HNZ. 2019-02-24T19:58:45.72 3.0 negative manual Pn 2.54 0
IV.NDIM.HHZ. 2019-02-24T19:58:40.71 3.0 undecidable manual S -2.76 0
IV.CELB.HHE. 2019-02-24T19:58:18.80 0.1 undecidable manual P 173 1.0207 50 0.12 87
MN.VLC.HHZ. 2019-02-24T19:58:16.76 0.6 undecidable manual S 32 0.4694 92 0.01 50
GU.CARD.HHZ. 2019-02-24T19:58:14.38 0.3 undecidable manual S 50 0.4137 93 -0.22 73
GU.GRAM.HHE. 2019-02-24T19:58:13.99 1.0 undecidable manual P 1 0.7302 50 0.28 23
IV.PII.HHZ. 2019-02-24T19:58:12.16 0.3 undecidable manual S 96 0.3516 93 -0.05 77
IV.MSSA.HHZ. 2019-02-24T19:58:11.97 1.0 negative manual P 326 0.6709 50 -0.72 20
GU.POPM.HHZ. 2019-02-24T19:58:11.51 0.3 undecidable manual P 61 0.5891 50 0.22 71
IV.MAGO.CHZ. 2019-02-24T19:58:11.92 0.6 undecidable manual P 137 0.661 50 -0.6 42
IV.PLMA.HHZ. 2019-02-24T19:58:10.89 0.3 undecidable manual S 335 0.3193 93 -0.06 77
GU.SARM.EHZ. 2019-02-24T19:58:09.68 0.6 positive manual P 31 0.4964 92 0 50
IV.BDI.HHZ. 2019-02-24T19:58:09.91 0.6 undecidable manual P 53 0.5009 50 0.13 49
GU.FIVI.HNE. 2019-02-24T19:58:09.40 0.6 undecidable manual P 7 0.482 92 0.02 50
MN.VLC.HHZ. 2019-02-24T19:58:09.14 0.1 positive manual P 32 0.4694 92 0.05 100
GU.CARD.HHZ. 2019-02-24T19:58:07.96 0.1 undecidable manual P 50 0.4137 93 0.1 100
IV.PII.HHZ. 2019-02-24T19:58:06.61 0.6 undecidable manual P 96 0.3516 93 0.14 50
IV.PLMA.HHZ. 2019-02-24T19:58:05.78 0.3 undecidable manual P 335 0.3193 93 0.04 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.SARM.EHN. ML:2 0.0002235 0.32 AML other m 2019-02-24T19:58:20.82
IV.PII.HHN. ML:1.9 0.000277 0.64 AML other m 2019-02-24T19:58:12.56
IV.PLMA.HHN. ML:1.8 0.0002625 0.44 AML other m 2019-02-24T19:58:14.60
IV.PII.HHE. ML:1.9 0.00028 1.64 AML other m 2019-02-24T19:58:19.95
MN.VLC.HHE. ML:1.5 8.54E-5 0.38 AML other m 2019-02-24T19:58:19.73
MN.VLC.HHN. ML:1.5 7.745E-5 0.64 AML other m 2019-02-24T19:58:19.62
GU.SARM.EHE. ML:1.9 0.0002003 0.44 AML other m 2019-02-24T19:58:20.60
MN.VLC.HNE. ML:1.4 5.991115E-5 1.4848 AML other m 2019-02-24T19:58:16.85
MN.VLC.HNN. ML:1.4 5.8543645E-5 0.6784 AML other m 2019-02-24T19:58:17.14
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