Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 01-02-2019 and time 22:34:44 (Italy) in region 6 km E Massa Marittima (GR)

A magnitude ML 1.9 earthquake occured in region: 6 km E Massa Marittima (GR), on

  • 01-02-2019 21:34:44 (UTC)
  • 01-02-2019 22:34:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.0610, 10.9620 at 10 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
Massa Marittima GR 6 8375 8375
Montieri GR 9 1204 9579
Monterotondo Marittimo GR 13 1371 10950
Chiusdino SI 15 1903 12853
Gavorrano GR 16 8580 21433
Castelnuovo di Val di Cecina PI 17 2231 23664
Roccastrada GR 18 9199 32863
Scarlino GR 19 3847 36710
Monticiano SI 20 1571 38281

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km NW of Grosseto (82087 inhabitants)
42 Km SW of Siena (53903 inhabitants)
76 Km SE of Livorno (159219 inhabitants)
80 Km S of Scandicci (50609 inhabitants)
82 Km SW of Firenze (382808 inhabitants)
86 Km SE of Pisa (89158 inhabitants)
87 Km SW of Arezzo (99543 inhabitants)
92 Km S of Prato (191150 inhabitants)
95 Km SE of Lucca (89046 inhabitants)
97 Km S of Pistoia (90315 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 1.9 2019-02-01
21:34:44		 43.0607 10.962 10 2019-08-22
08:25:13		 Bollettino Sismico Italiano INGV 71216361
Reviewed
Rev100 		ML 1.9 2019-02-01
21:34:44		 43.065 10.9647 9 2019-02-01
21:43:19		 Sala Sismica INGV-Roma 65132641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-02-01 21:34:44 ± 0.12
Latitude 43.0607 ± 0.0063
Longitude 10.9620 ± 0.0135
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 71216361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1135
Semi-minor axis of confidence ellipse (meter) 408
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 81
Circular confidence region, given by single value of horizontal uncertainty (meter) 1140.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 15
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.64391
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 17
Type of magnitude ML
Reference to an origin 71216361
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-08-06 09:32:58

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 17
Type of magnitude ML
Reference to an origin 65132641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-02-01 21:43:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MTMR.HNZ. 2019-02-01T21:36:42.51 3.0 undecidable manual Sg 12.16 0
IX.SNR3.HHZ.02 2019-02-01T21:36:37.18 3.0 undecidable manual Sn 1.33 0
IT.VNF1.HGZ. 2019-02-01T21:36:11.42 3.0 undecidable manual Sg 3.36 0
IV.ZONE.HHZ. 2019-02-01T21:36:08.49 3.0 undecidable manual Sg 3.03 0
IV.RM33.EHZ. 2019-02-01T21:35:41.81 3.0 undecidable manual Sg -1.08 0
GU.SATI.HHZ. 2019-02-01T21:35:41.64 3.0 negative manual Pn 0.69 0
IV.LRP.EHZ. 2019-02-01T21:35:22.94 3.0 undecidable manual Pn -3.47 0
IV.MAON.HHZ. 2019-02-01T21:35:06.43 0.3 undecidable manual S 169 71.4729 50 0.4 63
IV.OSSC.HHZ. 2019-02-01T21:35:01.89 0.3 undecidable manual S 24 56.1993 50 -0.07 69
IV.CELB.HHZ. 2019-02-01T21:34:57.20 0.3 undecidable manual P 241 70.2741 50 0.61 59
IV.MAON.HHZ. 2019-02-01T21:34:57.33 0.1 undecidable manual P 169 71.4729 50 0.55 80
IV.MAGO.CHZ. 2019-02-01T21:34:55.56 0.3 undecidable manual S 314 34.0437 50 -0.48 66
IV.OSSC.HHZ. 2019-02-01T21:34:54.77 0.1 undecidable manual P 24 56.1993 50 0.35 87
IV.CASP.HHZ. 2019-02-01T21:34:54.08 0.3 undecidable manual S 195 30.9468 50 -1.13 50
IV.FROS.CHZ. 2019-02-01T21:34:52.00 0.6 undecidable manual S 43 22.8549 113 -0.71 41
IV.MAGO.CHZ. 2019-02-01T21:34:51.02 0.1 undecidable manual P 314 34.0437 50 0.01 97
IV.CASP.HHZ. 2019-02-01T21:34:50.25 0.1 undecidable manual P 195 30.9468 50 -0.28 92
IV.FROS.CHZ. 2019-02-01T21:34:49.12 0.1 undecidable manual P 43 22.8549 113 0.04 99
IV.RIBO.EHZ.01 2019-02-01T21:34:49.76 0.3 undecidable manual S 151 14.1747 124 -0.28 71
IV.TRIF.CHZ. 2019-02-01T21:34:48.30 0.3 undecidable manual S 321 7.6812 141 -0.07 75
IV.RIBO.EHZ.01 2019-02-01T21:34:47.58 0.1 undecidable manual P 151 14.1747 124 0.04 100
IV.TRIF.CHZ. 2019-02-01T21:34:46.87 0.1 undecidable manual P 321 7.6812 141 0.29 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHN. ML:2.2 0.002258706 0.0768 AML other m 2019-02-01T21:34:48.39
IV.TRIF.CHE. ML:2.2 0.0023968305 0.064 AML other m 2019-02-01T21:34:48.61
IV.RIBO.EHE.01 ML:1.9 0.0008385398000000001 0.1024 AML other m 2019-02-01T21:34:49.81
IV.FROS.CHE. ML:1.6 0.00028929045 0.2048 AML other m 2019-02-01T21:34:53.14
IV.FROS.CHN. ML:1.8 0.0003676798 0.32 AML other m 2019-02-01T21:34:54.18
IV.CASP.HHE. ML:2.3 0.0008623219 0.1152 AML other m 2019-02-01T21:34:54.32
IV.CASP.HHN. ML:2.0 0.0005085456500000001 0.1152 AML other m 2019-02-01T21:34:54.34
IV.MAGO.CHE. ML:1.5 0.00014213901000000002 0.1024 AML other m 2019-02-01T21:34:56.07
IV.MAGO.CHN. ML:1.5 0.0001189013 0.128 AML other m 2019-02-01T21:34:56.67
IV.OSSC.HNN. ML:1.9 0.0001907683 0.6656 AML other m 2019-02-01T21:34:57.54
IV.OSSC.HNE. ML:2.0 0.0002062512 1.0752 AML other m 2019-02-01T21:35:01.09
IV.OSSC.HHE. ML:1.7 0.00011136035 0.1184 AML other m 2019-02-01T21:35:01.44
IV.OSSC.HHN. ML:1.4 0.0000566532295 0.6784 AML other m 2019-02-01T21:35:01.86
IV.MAON.HHE. ML:2.2 0.0002490906 0.2176 AML other m 2019-02-01T21:35:06.73
IV.MAON.HHN. ML:1.9 0.000141300705 0.1536 AML other m 2019-02-01T21:35:07.10
IV.CELB.HHE. ML:2.2 0.00028154345000000003 0.0512 AML other m 2019-02-01T21:35:08.19
IV.CELB.HHN. ML:2.2 0.0002686668 0.0512 AML other m 2019-02-01T21:35:08.24
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