Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 17-03-2020 and time 21:19:17 (UTC) in region 2 km E Monterotondo Marittimo (GR)

A magnitude ML 1.2 earthquake occured in region: 2 km E Monterotondo Marittimo (GR), on

  • 17-03-2020 21:19:17 (UTC)
  • 17-03-2020 22:19:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1380, 10.8800 at 8 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Monterotondo Marittimo GR 2 1371 1371
Castelnuovo di Val di Cecina PI 8 2231 3602
Massa Marittima GR 10 8375 11977
Montieri GR 11 1204 13181
Monteverdi Marittimo PI 14 758 13939
Chiusdino SI 17 1903 15842
Suvereto LI 17 3072 18914
Pomarance PI 18 5897 24811
Sassetta LI 19 514 25325
Radicondoli SI 19 914 26239

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km W of Siena (53903 inhabitants)
46 Km NW of Grosseto (82087 inhabitants)
65 Km SE of Livorno (159219 inhabitants)
73 Km SW of Scandicci (50609 inhabitants)
75 Km SE of Pisa (89158 inhabitants)
77 Km SW of Firenze (382808 inhabitants)
84 Km SE of Lucca (89046 inhabitants)
85 Km S of Prato (191150 inhabitants)
89 Km S of Pistoia (90315 inhabitants)
89 Km W of Arezzo (99543 inhabitants)
96 Km SE of Viareggio (62467 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.2 2020-03-17
21:19:17		 43.1378 10.8798 8 2020-07-18
21:08:42		 Bollettino Sismico Italiano INGV 81084191
Reviewed
Rev100 		ML 1.2 2020-03-17
21:19:17		 43.1358 10.8705 8 2020-03-17
21:29:49		 Sala Sismica INGV-Roma 77332771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-17 21:19:17 ± 0.13
Latitude 43.1378 ± 0.0072
Longitude 10.8798 ± 0.0099
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 81084191

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 849
Semi-minor axis of confidence ellipse (meter) 769
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 257
Circular confidence region, given by single value of horizontal uncertainty (meter) 850.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.41
Epicentral distance of station closest to the epicenter (degree) 0.02878
Epicentral distance of station farthest from the epicenter (degree) 0.73295
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 17
Type of magnitude ML
Reference to an origin 81084191
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-07-16 21:51:54

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 17
Type of magnitude ML
Reference to an origin 77332771
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-17 21:29:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CELB.HHZ. 2020-03-17T21:19:39.07 0.6 undecidable manual S 232 69.5748 50 -0.33 43
IV.ARCI.HHZ. 2020-03-17T21:19:35.28 0.6 undecidable manual S 123 57.7977 50 -0.98 35
IV.OSSC.HHZ. 2020-03-17T21:19:34.16 0.3 undecidable manual S 34 52.0035 50 -0.55 64
IV.CSNT.HHZ. 2020-03-17T21:19:33.49 0.6 undecidable manual S 42 49.8168 50 -0.63 41
IV.MAON.HHZ. 2020-03-17T21:19:32.74 0.3 undecidable manual P 165 81.3519 50 0.69 57
IV.MCIV.CHE. 2020-03-17T21:19:31.66 0.3 undecidable manual P 121 75.9684 50 0.43 63
TV.SF14.HHE. 2020-03-17T21:19:31.21 0.3 undecidable manual P 125 73.2711 50 0.41 64
IV.CASP.HHZ. 2020-03-17T21:19:30.13 0.3 undecidable manual S 182 38.5281 50 -0.98 54
IV.CELB.HHZ. 2020-03-17T21:19:30.91 0.3 undecidable manual P 232 69.5748 50 0.67 59
TV.SF13.HHE. 2020-03-17T21:19:30.68 0.3 undecidable manual P 120 69.6747 50 0.42 64
IV.ARCI.HHZ. 2020-03-17T21:19:28.58 0.1 undecidable manual P 123 57.7977 50 0.15 92
IV.CSNT.HHZ. 2020-03-17T21:19:27.96 0.3 undecidable manual P 42 49.8168 50 0.77 59
IV.OSSC.HHZ. 2020-03-17T21:19:27.64 0.3 undecidable manual P 34 52.0035 50 0.11 70
IV.RIBO.EHZ.01 2020-03-17T21:19:26.31 0.3 undecidable manual S 147 24.9528 108 -0.51 68
IV.FROS.CHZ. 2020-03-17T21:19:26.22 0.3 undecidable manual S 70 23.754 109 -0.21 72
IV.MAGO.CHZ. 2020-03-17T21:19:25.70 0.3 undecidable manual S 310 23.3544 109 -0.62 65
IV.CASP.HHZ. 2020-03-17T21:19:25.16 0.6 undecidable manual P 182 38.5281 50 -0.3 46
IV.RIBO.EHZ.01 2020-03-17T21:19:23.11 0.1 undecidable manual P 147 24.9528 108 0.13 98
IV.MAGO.CHZ. 2020-03-17T21:19:22.88 0.3 undecidable manual P 310 23.3544 109 0.19 73
IV.FROS.CHZ. 2020-03-17T21:19:22.90 0.3 undecidable manual P 70 23.754 109 0.14 74
IV.TRIF.CHE. 2020-03-17T21:19:20.54 0.1 undecidable manual S 144 3.1968 159 -0.22 100
IV.TRIF.CHE. 2020-03-17T21:19:19.77 0.1 undecidable manual P 144 3.1968 159 0.3 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MAGO.CHN. ML:1.1 0.00008143739 0.0896 AML other m 2020-03-17T21:19:26.04
IV.MAGO.CHE. ML:1.1 0.00008128982 0.1408 AML other m 2020-03-17T21:19:26.09
IV.FROS.CHE. ML:0.7 0.000033100525 0.1024 AML other m 2020-03-17T21:19:26.68
IV.FROS.CHN. ML:0.9 0.00004817603 1.8976 AML other m 2020-03-17T21:19:27.03
IV.RIBO.EHE.01 ML:1.2 0.000097981075 0.192 AML other m 2020-03-17T21:19:28.49
TV.SF04.EHE. ML:1.3 0.00003460076 0.2176 AML other m 2020-03-17T21:19:31.80
TV.SF04.EHN. ML:1.3 0.0000298953725 0.1792 AML other m 2020-03-17T21:19:31.80
IV.MAON.HNE. ML:2.1 0.0001672236 0.9504 AML other m 2020-03-17T21:19:32.56
IV.ARCI.HNE. ML:1.8 0.000125516615 1.2448 AML other m 2020-03-17T21:19:33.20
IV.ARCI.HHN. ML:0.8 0.00001601543 0.2048 AML other m 2020-03-17T21:19:35.49
IV.ARCI.HHE. ML:0.8 0.00001448062 0.2048 AML other m 2020-03-17T21:19:36.26
IV.CELB.HHN. ML:1.1 0.00001963318 1.8976 AML other m 2020-03-17T21:19:39.97
IV.CELB.HHE. ML:1.2 0.00003069098 0.0512 AML other m 2020-03-17T21:19:40.04
IV.MAON.HHN. ML:1.2 0.00001870464 0.2048 AML other m 2020-03-17T21:19:43.61
IV.MAON.HHE. ML:0.9 0.000012431129999999999 0.2048 AML other m 2020-03-17T21:19:46.38
IV.ARCI.HNN. ML:1.8 0.00014935365 0.7424 AML other m 2020-03-17T21:19:48.28
IV.MAON.HNN. ML:2.0 0.00014820935000000001 0.7552 AML other m 2020-03-17T21:19:57.73
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download