Earthquake with magnitude of ML 1.1 on date 19-03-2020 and time 04:08:35 (Italy) in region 6 km SW Pomarance (PI)

A magnitude ML 1.1 earthquake occured in region: 6 km SW Pomarance (PI), on

  • 19-03-2020 03:08:35 (UTC)
  • 19-03-2020 04:08:35 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.25, 10.84 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
Pomarance PI 6 5897 5897
Castelnuovo di Val di Cecina PI 8 2231 8128
Monterotondo Marittimo GR 12 1371 9499
Monteverdi Marittimo PI 13 758 10257
Radicondoli SI 16 914 11171
Volterra PI 17 10519 21690
Montecatini Val di Cecina PI 17 1749 23439
Guardistallo PI 18 1234 24673
Casale Marittimo PI 19 1122 25795
Montescudaio PI 19 2144 27939
Casole d'Elsa SI 19 3897 31836
Bibbona LI 20 3175 35011
Montieri GR 20 1204 36215

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km W of Siena (53903 inhabitants)
54 Km SE of Livorno (159219 inhabitants)
59 Km NW of Grosseto (82087 inhabitants)
62 Km SE of Pisa (89158 inhabitants)
63 Km SW of Scandicci (50609 inhabitants)
66 Km SW of Firenze (382808 inhabitants)
71 Km SE of Lucca (89046 inhabitants)
73 Km S of Prato (191150 inhabitants)
76 Km S of Pistoia (90315 inhabitants)
83 Km SE of Viareggio (62467 inhabitants)
88 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
Rev 100 ML 1.1 2020-03-19
03:08:35
43.25 10.84 5 2020-03-19
03:16:16
Sala Sismica INGV-Roma 77371521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-19 03:08:35 ± 0.08
Latitude 43.25 ± 0.00
Longitude 10.84 ± 0.00
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 77371521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 509
Semi-minor axis of confidence ellipse (meter) 118
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 168
Circular confidence region, given by single value of horizontal uncertainty (meter) 510
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.134
Epicentral distance of station farthest from the epicenter (degree) 0.68528
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.4
Num. used stations 12
Type of magnitude ML
Reference to an origin 77371521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-19 03:16:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CELB.HHZ. 2020-03-19T03:08:59.17 0.6 undecidable manual S 222 0.6853 50 0.01 47
IV.OSSC.HHZ. 2020-03-19T03:08:50.50 0.3 undecidable manual S 47 0.3984 96 0.06 74
IV.CELB.HHZ. 2020-03-19T03:08:48.87 0.3 undecidable manual P 222 0.6853 50 -0.08 69
IV.PII.HHN. 2020-03-19T03:08:45.63 0.6 undecidable manual P 334 0.5207 50 -0.49 44
IV.CASP.HHE. 2020-03-19T03:08:45.50 0.6 undecidable manual P 178 0.4641 50 0.34 46
IV.FROS.CHZ. 2020-03-19T03:08:44.00 0.3 undecidable manual S 101 0.2338 100 -0.17 75
IV.CSNT.HHN. 2020-03-19T03:08:43.73 0.6 undecidable manual P 56 0.393 96 -0.06 49
IV.OSSC.HHZ. 2020-03-19T03:08:43.88 0.3 undecidable manual P 47 0.3984 96 -0.04 74
IV.FROS.CHZ. 2020-03-19T03:08:40.56 0.3 positive manual P 101 0.2338 100 0.27 73
IV.MAGO.CHZ. 2020-03-19T03:08:40.28 0.3 undecidable manual S 278 0.134 108 -0.16 76
IV.TRIF.CHZ. 2020-03-19T03:08:40.54 0.3 undecidable manual S 162 0.1466 106 -0.35 73
IV.MAGO.CHZ. 2020-03-19T03:08:38.37 0.1 negative manual P 278 0.134 108 0.23 100
IV.TRIF.CHZ. 2020-03-19T03:08:38.67 0.3 undecidable manual P 162 0.1466 106 0.27 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MAGO.CHE. ML:1.4 0.00026632135 0.072 AML other m 2020-03-19T03:08:40.57
IV.MAGO.CHN. ML:1.5 0.0003592629 0.088 AML other m 2020-03-19T03:08:40.51
IV.TRIF.CHE. ML:0.9 9.0048225E-5 0.152 AML other m 2020-03-19T03:08:41.31
IV.TRIF.CHN. ML:1 9.374849E-5 0.12 AML other m 2020-03-19T03:08:41.06
IV.FROS.CHE. ML:0.5 2.1365775E-5 0.16 AML other m 2020-03-19T03:08:46.07
IV.FROS.CHN. ML:0.7 2.983878E-5 0.264 AML other m 2020-03-19T03:08:45.98
IV.OSSC.HHE. ML:0.5 9.514618E-6 1.3792 AML other m 2020-03-19T03:08:50.72
IV.OSSC.HHN. ML:0.5 1.0653163E-5 2.8 AML other m 2020-03-19T03:08:50.53
IV.CELB.HHE. ML:1.3 3.0656885E-5 0.0592 AML other m 2020-03-19T03:09:02.01
IV.CELB.HHN. ML:1.1 1.8371115E-5 0.08 AML other m 2020-03-19T03:09:01.48
IV.OSSC.HNE. ML:1.2 4.956206E-5 1.4816 AML other m 2020-03-19T03:08:51.23
IV.OSSC.HNN. ML:1.6 0.00011104065 1.3712 AML other m 2020-03-19T03:08:51.91
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