Earthquake with magnitude of ML 3.0 on date 09-12-2019 and time 04:42:36 (Italy) in region 4 km N Scarperia e San Piero (FI)

A magnitude ML 3.0 earthquake occured in region: 4 km N Scarperia e San Piero (FI), on

  • 09-12-2019 03:42:36 (UTC)
  • 09-12-2019 04:42:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.9970, 11.3220 at 6 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Scarperia e San Piero FI 4 12217 12217
Barberino di Mugello FI 7 10836 23053
Borgo San Lorenzo FI 7 18211 41264
Vaglia FI 10 5073 46337
Vicchio FI 13 8044 54381
Firenzuola FI 14 4726 59107
Vernio PO 15 6060 65167
Vaiano PO 16 9895 75062
Cantagallo PO 17 3105 78167
Calenzano FI 19 17489 95656
Dicomano FI 20 5515 101171

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km NE of Prato (191150 inhabitants)
26 Km N of Firenze (382808 inhabitants)
29 Km NE of Scandicci (50609 inhabitants)
33 Km E of Pistoia (90315 inhabitants)
51 Km SW of Imola (69797 inhabitants)
55 Km SW of Faenza (58541 inhabitants)
56 Km S of Bologna (386663 inhabitants)
63 Km W of Forlì (117913 inhabitants)
68 Km E of Lucca (89046 inhabitants)
74 Km NW of Arezzo (99543 inhabitants)
75 Km W of Cesena (96758 inhabitants)
75 Km N of Siena (53903 inhabitants)
79 Km SE of Modena (184973 inhabitants)
80 Km E of Pisa (89158 inhabitants)
84 Km SW of Ravenna (159116 inhabitants)
87 Km E of Viareggio (62467 inhabitants)
94 Km SE of Carpi (70699 inhabitants)
94 Km E of Massa (69479 inhabitants)
95 Km NE of Livorno (159219 inhabitants)
95 Km SE of Reggio nell'Emilia (171345 inhabitants)
96 Km S of Ferrara (133155 inhabitants)
98 Km E of Carrara (63133 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap

These three maps show the results of the analysis using the software ShakeMap designed to provide the level of ground shaking experienced in a region using the data recorded by seismometers and strong motion instruments and seismological information regarding the attenuation of the wavefield with distance and the site characteristics. The Shakemaps are determined for research purposes to provide fast estimates of the level of ground shaking produced by the earthquake. The maps are calculated automatically and updated as more data become available. See http://shakemap.ingv.it for additional information. The black star indicates the epicenter. The triangles show the accelerometric and velocimetric stations used in the calculation, colored according to the recorded shaking.

Intensity Shakemap

Intensity Shakemap

This map shows the distribution of instrumental intensities. The intensity is derived through an empirical law that correlates the recorded values of actual ground shaking, e.g., acceleration and velocity, with the macroseismic intensity for Italian earthquakes, as reported in the Italian Macroseismic Database (DBMI15, https://doi.org/10.13127/cpti/cpti15.3).
Peak ground acceleration Shakemap

Peak ground acceleration Shakemap

This map shows the distribution of peak ground acceleration expressed as percent of the acceleration of gravity (i.e., g = 9.81 m/s²).
Peak velocity Shakemap

Peak velocity Shakemap

This map shows the distribution of peak ground velocities expressed in cm/s.
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 3.0 2019-12-09
03:42:36
43.9968 11.3223 6 2020-02-28
16:42:12
Bollettino Sismico Italiano INGV 74478251
Reviewed
Rev100
ML 3.0 2019-12-09
03:42:36
44.0145 11.3252 8 2019-12-09
03:58:55
Sala Sismica INGV-Roma 74454891
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-09 03:42:36 ± 0.11
Latitude 43.9968 ± 0.0063
Longitude 11.3223 ± 0.0063
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 74478251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 524
Semi-minor axis of confidence ellipse (meter) 465
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 16
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 46
Number of associated phases, regardless of their use for origin computation 63
Number of defining phases 61
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.47
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.33279
Number of stations at which the event was observed 40
Number of stations from which data was used for origin computation 39
Magnitudes information

ML:3.0

Field Value
Value 3.0
Uncertainty 0.2
Num. used stations 32
Type of magnitude ML
Reference to an origin 74478251
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-02-19 14:00:07

ML:3.0

Field Value
Value 3.0
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 74454891
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-09 03:58:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MSSA.HHZ. 2019-12-09T03:43:20.75 0.6 undecidable manual S 284 147.9408 50 0.99 29
GU.GRAM.HHZ. 2019-12-09T03:43:12.53 0.6 undecidable manual S 299 113.8971 50 1.86 19
GU.FIVI.HNE. 2019-12-09T03:43:06.97 0.6 undecidable manual S 286 98.9232 50 0.31 41
IV.MSSA.HHZ. 2019-12-09T03:43:03.37 0.3 undecidable manual P 284 147.9408 50 1.81 27
GU.SARM.EHN. 2019-12-09T03:43:00.41 0.6 undecidable manual S 286 76.2681 50 -0.22 43
MN.VLC.HHZ. 2019-12-09T03:43:00.42 0.6 undecidable manual S 284 76.7676 50 -0.33 42
GU.GSCL.HHN. 2019-12-09T03:42:59.10 0.6 undecidable manual S 304 70.374 50 0.05 45
IV.RIBO.EHZ. 2019-12-09T03:42:58.23 0.3 undecidable manual P 191 118.3926 50 1.24 41
IV.PLMA.HHE. 2019-12-09T03:42:57.56 1.0 undecidable manual P 273 117.2937 50 0.73 17
IV.ATVO.HHN. 2019-12-09T03:42:56.94 0.6 undecidable manual P 128 110.5005 50 1.15 29
GU.CARD.HHZ. 2019-12-09T03:42:56.98 0.6 undecidable manual S 273 67.0773 50 -1.2 31
IV.ATPC.HHE. 2019-12-09T03:42:56.72 0.6 undecidable manual P 122 107.5146 50 1.4 25
GU.GRAM.HHZ. 2019-12-09T03:42:56.62 0.6 undecidable manual P 299 113.8971 50 0.31 40
IV.APEC.HNN. 2019-12-09T03:42:55.34 1.0 undecidable manual P 119 100.4217 50 1.1 15
IV.CSNT.HHZ. 2019-12-09T03:42:55.23 0.6 undecidable manual S 183 58.1973 50 -0.56 41
IV.OSSC.HHZ. 2019-12-09T03:42:54.01 0.6 undecidable manual S 187 52.9026 50 -0.37 44
IV.BADI.EHE. 2019-12-09T03:42:54.37 0.6 undecidable manual P 126 91.5417 50 1.51 25
IV.BDI.HNZ. 2019-12-09T03:42:54.72 0.6 undecidable manual S 277 58.3971 50 -1.14 32
GU.FIVI.HNE. 2019-12-09T03:42:54.84 0.6 undecidable manual P 286 98.9232 50 0.84 34
GU.EQUI.HHN. 2019-12-09T03:42:54.69 0.3 undecidable manual P 282 95.0382 50 1.29 42
IV.CPGN.EHZ. 2019-12-09T03:42:53.71 1.0 undecidable manual P 105 82.6506 50 2.21 7
IV.ATMC.EHE. 2019-12-09T03:42:53.71 0.6 undecidable manual P 131 92.7405 50 0.67 37
IV.PARC.HHE. 2019-12-09T03:42:52.40 0.6 undecidable manual P 117 82.8504 50 0.87 35
IV.FIU.EHN. 2019-12-09T03:42:52.01 0.6 undecidable manual P 11 72.6717 50 2.06 17
GU.POPM.HHZ. 2019-12-09T03:42:51.28 0.6 undecidable manual S 277 45.4212 50 -1.11 33
IV.BRIS.HHN. 2019-12-09T03:42:51.66 0.6 undecidable manual S 54 43.4232 50 -0.21 46
IV.ASQU.HHZ. 2019-12-09T03:42:51.52 0.6 undecidable manual S 121 43.4232 50 -0.34 45
IV.SFI.EHZ. 2019-12-09T03:42:51.19 0.6 undecidable manual S 104 43.1235 50 -0.59 42
GU.SARM.EHN. 2019-12-09T03:42:50.61 0.6 undecidable manual P 286 76.2681 50 0.09 45
MN.VLC.HHZ. 2019-12-09T03:42:50.66 0.3 undecidable manual P 284 76.7676 50 0.08 67
GU.CARD.HHZ. 2019-12-09T03:42:49.49 1.0 undecidable manual P 273 67.0773 50 0.39 21
GU.GSCL.HHN. 2019-12-09T03:42:49.30 0.3 undecidable manual P 304 70.374 50 -0.3 65
GU.MAIM.HHZ. 2019-12-09T03:42:49.94 0.6 undecidable manual P 262 66.9774 50 0.86 36
IV.PII.HHZ. 2019-12-09T03:42:49.28 0.3 undecidable manual P 245 70.6737 50 -0.37 64
IV.CRMI.HHZ. 2019-12-09T03:42:48.91 0.6 undecidable manual S 231 35.3424 100 -0.22 47
IV.CRE.HHE. 2019-12-09T03:42:48.91 0.3 undecidable manual P 130 65.5899 50 0.05 69
IV.IMOL.HNZ. 2019-12-09T03:42:47.43 0.6 undecidable manual P 40 52.3032 50 0.61 41
IV.CSNT.HHZ. 2019-12-09T03:42:47.18 0.3 undecidable manual P 183 58.1973 50 -0.54 63
IV.ZCCA.HNN. 2019-12-09T03:42:47.00 0.3 undecidable manual P 325 47.9187 50 0.86 56
IV.LMD.HHZ. 2019-12-09T03:42:47.39 0.3 undecidable manual S 74 31.9458 101 -0.59 64
IV.FIR.HHZ. 2019-12-09T03:42:46.36 0.6 undecidable manual S 192 25.2525 103 0.66 42
IV.OSSC.HHZ. 2019-12-09T03:42:46.41 0.1 undecidable manual P 187 52.9026 50 -0.49 86
IV.BDI.HNZ. 2019-12-09T03:42:46.79 0.3 undecidable manual P 277 58.3971 50 -0.97 52
IV.RUFI.EHZ. 2019-12-09T03:42:45.03 0.6 undecidable manual S 140 23.1546 105 0.05 50
IV.BRIS.HHN. 2019-12-09T03:42:45.24 0.3 undecidable manual P 54 43.4232 50 -0.22 69
IV.ASQU.HHZ. 2019-12-09T03:42:44.92 0.3 undecidable manual P 121 43.4232 50 -0.53 64
IV.SFI.EHZ. 2019-12-09T03:42:44.91 0.3 undecidable manual P 104 43.1235 50 -0.49 65
IT.FIE.HGZ. 2019-12-09T03:42:44.38 0.6 undecidable manual S -0.07 50
IV.MTRZ.HNN. 2019-12-09T03:42:44.42 0.3 undecidable manual P 13 35.9418 100 0.42 67
GU.POPM.HHZ. 2019-12-09T03:42:44.75 0.1 undecidable manual P 277 45.4212 50 -1 70
IV.FNVD.HHZ. 2019-12-09T03:42:44.69 0.6 undecidable manual S 320 24.753 104 -0.84 39
IV.CRMI.HHZ. 2019-12-09T03:42:43.45 0.1 undecidable manual P 231 35.3424 100 -0.42 90
IV.MPPT.EHZ. 2019-12-09T03:42:43.63 0.3 undecidable manual S 257 19.0698 108 0.01 75
IV.LMD.HHZ. 2019-12-09T03:42:42.53 0.1 undecidable manual P 74 31.9458 101 -0.68 83
IV.FIR.HHZ. 2019-12-09T03:42:42.01 0.1 undecidable manual P 192 25.2525 103 0.12 97
IV.RUFI.EHZ. 2019-12-09T03:42:41.50 0.1 undecidable manual P 140 23.1546 105 0.02 100
IV.FNVD.HHZ. 2019-12-09T03:42:41.19 0.3 undecidable manual P 320 24.753 104 -0.6 65
IV.MOCL.EHZ. 2019-12-09T03:42:41.34 0.3 undecidable manual S 275 11.2776 118 0.2 74
IT.FIE.HGZ. 2019-12-09T03:42:41.20 0.1 undecidable manual P 0.04 100
IV.MPPT.EHZ. 2019-12-09T03:42:40.73 0.1 undecidable manual P 257 19.0698 108 0.04 100
IV.MOCL.EHZ. 2019-12-09T03:42:39.44 0.1 undecidable manual P 275 11.2776 118 0.18 99
IV.SEI.HHZ. 2019-12-09T03:42:37.24 3.0 undecidable manual S 6.993 -2.65 0
IV.SEI.HHZ. 2019-12-09T03:42:35.77 3.0 undecidable manual P 6.993 -2.77 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOCL.EHN. ML:3.5 0.04809492 0.2 AML other m 2019-12-09T03:42:41.46
IV.MOCL.EHE. ML:3.0 0.015221115 0.16 AML other m 2019-12-09T03:42:41.79
IV.MPPT.EHE. ML:3.0 0.008958508 0.28 AML other m 2019-12-09T03:42:43.79
IV.MPPT.EHN. ML:3.1 0.011794174999999999 0.2592 AML other m 2019-12-09T03:42:44.54
IV.FNVD.HHN. ML:3.0 0.00706047 0.4 AML other m 2019-12-09T03:42:46.35
IV.FIR.HNE. ML:3.3 0.01210136 0.4112 AML other m 2019-12-09T03:42:46.78
IV.FIR.HHE. ML:3.3 0.012234624 0.4208 AML other m 2019-12-09T03:42:46.79
IV.FIR.HNN. ML:3.2 0.0091437125 0.2704 AML other m 2019-12-09T03:42:47.11
IV.FNVD.HHE. ML:2.9 0.005485798 0.4 AML other m 2019-12-09T03:42:47.79
IV.LMD.HHN. ML:3.0 0.005495469 0.1184 AML other m 2019-12-09T03:42:48.12
IV.FIR.HHN. ML:3.1 0.008913493 0.4592 AML other m 2019-12-09T03:42:49.19
IV.LMD.HHE. ML:2.9 0.003436422 0.2208 AML other m 2019-12-09T03:42:49.23
IV.CRMI.HNE. ML:3.1 0.0058578625 0.3408 AML other m 2019-12-09T03:42:49.25
IV.CRMI.HHE. ML:2.7 0.0021984744999999995 0.3808 AML other m 2019-12-09T03:42:49.24
IV.RUFI.EHE. ML:2.5 0.0021889415 0.7392 AML other m 2019-12-09T03:42:50.22
IV.RUFI.EHN. ML:2.6 0.0030944180000000003 0.4992 AML other m 2019-12-09T03:42:50.80
GU.POPM.HHN. ML:3.4 0.0073927505 0.2592 AML other m 2019-12-09T03:42:51.64
GU.POPM.HHE. ML:3.2 0.0053995879999999994 0.2016 AML other m 2019-12-09T03:42:52.05
IV.SFI.HNE. ML:2.6 0.0011829488500000001 0.1504 AML other m 2019-12-09T03:42:52.10
IV.SFI.EHE. ML:2.6 0.0011926314 0.16 AML other m 2019-12-09T03:42:52.11
IV.CRMI.HHN. ML:3.0 0.0036859605 0.3408 AML other m 2019-12-09T03:42:53.28
IV.CRMI.HNN. ML:3.3 0.0092558045 0.36 AML other m 2019-12-09T03:42:53.29
IV.OSSC.HNN. ML:3.0 0.0024182189999999997 0.5216 AML other m 2019-12-09T03:42:54.82
IV.OSSC.HHE. ML:3.0 0.002379541 0.52 AML other m 2019-12-09T03:42:54.81
IV.SFI.HNN. ML:2.5 0.00112292305 0.4896 AML other m 2019-12-09T03:42:55.90
IV.CSNT.HHE. ML:2.8 0.0012847344999999998 0.4208 AML other m 2019-12-09T03:42:56.63
GU.CARD.HHN. ML:3.0 0.0017001005 0.4592 AML other m 2019-12-09T03:42:57.58
IV.OSSC.HHN. ML:2.9 0.0020625229999999997 0.76 AML other m 2019-12-09T03:42:58.09
IV.OSSC.HNE. ML:2.9 0.0020788295 0.7584 AML other m 2019-12-09T03:42:58.10
GU.CARD.HHE. ML:2.8 0.0012761021500000001 0.5216 AML other m 2019-12-09T03:42:58.90
IV.CSNT.HHN. ML:3.1 0.0027964405 0.56 AML other m 2019-12-09T03:42:59.57
IV.SFI.EHN. ML:2.5 0.00113558 0.84 AML other m 2019-12-09T03:43:00.77
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, /tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format Download