Earthquake with magnitude of ML 1.7 on date 23-01-2020 and time 17:57:11 (Italy) in region 4 km S Radicondoli (SI)

A magnitude ML 1.7 earthquake occured in region: 4 km S Radicondoli (SI), on

  • 23-01-2020 16:57:11 (UTC)
  • 23-01-2020 17:57:11 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.22, 11.05 at 9 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
Chiusdino SI 8 1903 2817
Montieri GR 11 1204 4021
Castelnuovo di Val di Cecina PI 12 2231 6252
Casole d'Elsa SI 13 3897 10149
Monticiano SI 14 1571 11720
Sovicille SI 16 10116 21836
Pomarance PI 16 5897 27733
Monterotondo Marittimo GR 18 1371 29104

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km W of Siena (53903 inhabitants)
52 Km N of Grosseto (82087 inhabitants)
60 Km S of Scandicci (50609 inhabitants)
63 Km S of Firenze (382808 inhabitants)
70 Km SE of Livorno (159219 inhabitants)
73 Km W of Arezzo (99543 inhabitants)
73 Km S of Prato (191150 inhabitants)
75 Km SE of Pisa (89158 inhabitants)
80 Km S of Pistoia (90315 inhabitants)
82 Km SE of Lucca (89046 inhabitants)
96 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
Rev 100 ML 1.7 2020-01-23
16:57:11
43.23 11.05 9 2020-01-23
17:07:40
Sala Sismica INGV-Roma 75773451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-01-23 16:57:11 ± 0.14
Latitude 43.23 ± 0.01
Longitude 11.05 ± 0.01
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 75773451

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 874
Semi-minor axis of confidence ellipse (meter) 518
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 124
Circular confidence region, given by single value of horizontal uncertainty (meter) 870
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 66
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 21
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) 0.7986
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 75773451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-01-23 17:07:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GATE.HHZ. 2020-01-23T16:58:58.54 3.0 undecidable manual Sg 14.19 0
IV.FIAM.HHZ. 2020-01-23T16:58:12.92 3.0 undecidable manual Sg 6.07 0
IT.VNF1.HGZ. 2020-01-23T16:58:08.13 3.0 positive manual Pg 11.17 0
GU.PZZ.HHZ. 2020-01-23T16:58:07.17 3.0 positive manual Pn 5.89 0
IV.PAOL.HHZ. 2020-01-23T16:58:05.73 3.0 undecidable manual Pn 0.69 0
IV.MILN.HHZ. 2020-01-23T16:58:02.50 3.0 negative manual Pg 8.45 0
IV.GAVE.EHZ. 2020-01-23T16:57:43.79 3.0 undecidable manual P 5.7 0
IV.RMP.HHZ. 2020-01-23T16:57:43.23 3.0 positive manual Pn -0.62 0
TV.SF01.EHZ. 2020-01-23T16:57:31.78 0.6 undecidable manual S 137 0.5594 50 0.38 43
IV.MAON.HHZ. 2020-01-23T16:57:28.03 0.3 undecidable manual P 176 0.7986 50 0.76 53
IV.CASP.HHZ. 2020-01-23T16:57:27.63 0.3 undecidable manual S 197 0.4542 50 -0.65 60
IV.RUFI.EHZ. 2020-01-23T16:57:26.25 0.3 undecidable manual P 29 0.6979 50 0.71 56
IV.OSSC.HHZ. 2020-01-23T16:57:24.12 0.6 undecidable manual S 26 0.331 50 -0.52 43
IV.CRMI.HNE. 2020-01-23T16:57:24.14 0.3 undecidable manual P 355 0.572 50 0.75 56
IV.PII.HHZ. 2020-01-23T16:57:24.83 0.6 undecidable manual P 323 0.6241 50 0.55 40
TV.SF01.EHZ. 2020-01-23T16:57:23.41 0.3 undecidable manual P 137 0.5594 50 0.23 66
TV.SF04.EHZ. 2020-01-23T16:57:23.80 0.3 undecidable manual P 131 0.5936 50 0.04 68
IV.CSNT.HHZ. 2020-01-23T16:57:23.26 0.3 undecidable manual S 35 0.304 50 -0.58 64
IV.MAGO.CHZ. 2020-01-23T16:57:22.61 0.3 undecidable manual S 280 0.2869 50 -0.71 61
IV.RIBO.EHZ.01 2020-01-23T16:57:22.13 0.6 undecidable manual S 180 0.2761 50 -0.88 38
IV.CASP.HHZ. 2020-01-23T16:57:21.65 0.1 undecidable manual P 197 0.4542 50 0.28 89
IV.OSSC.HHZ. 2020-01-23T16:57:19.16 0.3 undecidable manual P 26 0.331 50 -0.11 71
IV.MAGO.CHZ. 2020-01-23T16:57:18.59 0.3 undecidable manual P 280 0.2869 50 0.08 72
IV.TRIF.CHZ. 2020-01-23T16:57:18.33 0.6 undecidable manual S 224 0.152 118 -0.28 47
IV.RIBO.EHZ.01 2020-01-23T16:57:18.63 0.3 undecidable manual P 180 0.2761 50 0.3 69
IV.CSNT.HHZ. 2020-01-23T16:57:18.65 0.3 undecidable manual P 35 0.304 50 -0.16 71
IV.TRIF.CHZ. 2020-01-23T16:57:16.00 0.3 undecidable manual P 224 0.152 118 0.22 72
IV.FROS.CHZ. 2020-01-23T16:57:15.91 0.3 undecidable manual S 101 0.0809 135 -0.48 69
IV.FROS.CHZ. 2020-01-23T16:57:14.43 0.1 undecidable manual P 101 0.0809 135 -0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.CHN. ML:2.5 0.004165 0.38 AML other m 2020-01-23T16:57:16.19
IV.FROS.CHE. ML:2.3 0.00308 0.2 AML other m 2020-01-23T16:57:16.09
IV.TRIF.CHN. ML:2 0.000922 0.8 AML other m 2020-01-23T16:57:19.46
IV.TRIF.CHE. ML:1.9 0.000709 1.26 AML other m 2020-01-23T16:57:19.17
IV.MAGO.CHN. ML:1.5 0.000154 0.14 AML other m 2020-01-23T16:57:22.81
IV.CSNT.HHN. ML:1.4 0.00010655 0.16 AML other m 2020-01-23T16:57:23.41
IV.MAGO.CHE. ML:1.4 0.00010735 1.1 AML other m 2020-01-23T16:57:23.58
IV.CSNT.HHE. ML:1.4 0.00011115 0.54 AML other m 2020-01-23T16:57:23.47
TV.SF01.EHN. ML:1.8 0.00010945 1.72 AML other m 2020-01-23T16:57:31.92
TV.SF01.EHE. ML:1.8 0.00012485 1.78 AML other m 2020-01-23T16:57:32.92
IV.PII.HHN. ML:1.4 4.665E-5 1.68 AML other m 2020-01-23T16:57:37.10
IV.PII.HHE. ML:1.5 5.39E-5 0.96 AML other m 2020-01-23T16:57:37.63
IV.MAON.HHN. ML:1.7 6.64E-5 1.56 AML other m 2020-01-23T16:57:40.16
IV.CELB.HHE. ML:2 0.00011375 0.06 AML other m 2020-01-23T16:57:52.79
IV.RIBO.EHE.01 ML:1.9 0.0004133404 0.1536 AML other m 2020-01-23T16:57:22.23
IV.OSSC.HHE. ML:1 4.2058425E-5 0.2432 AML other m 2020-01-23T16:57:24.38
IV.OSSC.HHN. ML:1 3.5293295E-5 0.2176 AML other m 2020-01-23T16:57:24.52
IV.CASP.HHE. ML:1.9 0.0002176656 0.0768 AML other m 2020-01-23T16:57:27.87
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