Earthquake with magnitude of ML 1.0 on date 04-07-2020 and time 14:00:44 (Italy) in region 4 km W Radicondoli (SI)

A magnitude ML 1.0 earthquake occured in region: 4 km W Radicondoli (SI), on

  • 04-07-2020 12:00:44 (UTC)
  • 04-07-2020 14:00:44 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.25, 11 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
Radicondoli SI 4 914 914
Castelnuovo di Val di Cecina PI 9 2231 3145
Casole d'Elsa SI 11 3897 7042
Pomarance PI 11 5897 12939
Chiusdino SI 13 1903 14842
Montieri GR 14 1204 16046
Monterotondo Marittimo GR 17 1371 17417
Sovicille SI 19 10116 27533
Monticiano SI 20 1571 29104
Volterra PI 20 10519 39623

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km W of Siena (53903 inhabitants)
56 Km N of Grosseto (82087 inhabitants)
58 Km S of Scandicci (50609 inhabitants)
61 Km SW of Firenze (382808 inhabitants)
65 Km SE of Livorno (159219 inhabitants)
70 Km S of Prato (191150 inhabitants)
70 Km SE of Pisa (89158 inhabitants)
76 Km W of Arezzo (99543 inhabitants)
76 Km S of Pistoia (90315 inhabitants)
77 Km SE of Lucca (89046 inhabitants)
91 Km SE of Viareggio (62467 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 1.0 2020-07-04
12:00:44
43.25 11 10 2020-07-04
12:32:43
Sala Sismica INGV-Roma 80773261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-04 12:00:44 ± 0.26
Latitude 43.25 ± 0.01
Longitude 11.00 ± 0.02
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 80773261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2219
Semi-minor axis of confidence ellipse (meter) 598
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 134
Circular confidence region, given by single value of horizontal uncertainty (meter) 2220
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 198
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.12501
Epicentral distance of station farthest from the epicenter (degree) 0.47304
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:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 80773261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-04 12:32:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CASP.HHZ. 2020-07-04T12:01:00.67 0.3 undecidable manual S 192 0.473 50 -0.16 70
IV.CSNT.HHZ. 2020-07-04T12:00:55.43 0.3 undecidable manual S 44 0.3058 50 -0.46 68
IV.CASP.HHZ. 2020-07-04T12:00:54.17 0.1 undecidable manual P 192 0.473 50 0.37 89
IV.CSNT.HHZ. 2020-07-04T12:00:51.09 0.1 undecidable manual P 44 0.3058 50 0.14 97
IV.FROS.CHZ. 2020-07-04T12:00:50.07 0.3 undecidable manual S 111 0.125 127 -0.14 75
IV.TRIF.CHZ. 2020-07-04T12:00:50.70 0.3 undecidable manual S 206 0.1547 121 -0.47 70
IV.TRIF.CHZ. 2020-07-04T12:00:48.35 0.1 undecidable manual P 206 0.1547 121 0.12 100
IV.FROS.CHZ. 2020-07-04T12:00:47.94 0.1 undecidable manual P 111 0.125 127 0.27 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHN. ML:0 8.93E-5 0.94 AML other m 2020-07-04T12:00:49.87
IV.FROS.CHE. ML:1.3 0.0001845 0.24 AML other m 2020-07-04T12:00:50.61
IV.FROS.CHN. ML:1.2 0.000144 0.5 AML other m 2020-07-04T12:00:51.50
IV.TRIF.CHE. ML:0 0.00010425 0.22 AML other m 2020-07-04T12:00:51.36
IV.CSNT.HHE. ML:0.4 1.2435041E-5 0.1024 AML other m 2020-07-04T12:00:56.03
IV.CSNT.HHN. ML:0.6 1.286051415E-5 0.2176 AML other m 2020-07-04T12:00:55.63
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