INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 2.0 on date 27-01-2019 and time 08:24:22 (UTC) in region 4 km N Montespertoli (FI)

A magnitude ML 2.0 earthquake occured in region: 4 km N Montespertoli (FI), on

  • 27-01-2019 08:24:22 (UTC)
  • 27-01-2019 09:24:22 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.68, 11.09 at 7 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
Montespertoli FI 4 13537 13537
Montelupo Fiorentino FI 8 14098 27635
San Casciano in Val di Pesa FI 8 17062 44697
Lastra a Signa FI 11 20156 64853
Capraia e Limite FI 11 7670 72523
Signa FI 12 19179 91702
Scandicci FI 12 50609 142311
Empoli FI 12 48109 190420
Castelfiorentino FI 12 17504 207924
Impruneta FI 14 14615 222539
Tavarnelle Val di Pesa FI 15 7800 230339
Certaldo FI 15 16121 246460
Poggio a Caiano PO 16 10007 256467
Carmignano PO 16 14450 270917
Barberino Val d'Elsa FI 17 4386 275303
Campi Bisenzio FI 17 46166 321469
Firenze FI 17 382808 704277
Vinci FI 18 14604 718881
Gambassi Terme FI 19 4870 723751
San Miniato PI 19 27934 751685
Cerreto Guidi FI 19 10870 762555
Sesto Fiorentino FI 20 48958 811513
Montaione FI 20 3700 815213

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km SW of Scandicci (50609 inhabitants)
17 Km SW of Firenze (382808 inhabitants)
23 Km S of Prato (191150 inhabitants)
32 Km SE of Pistoia (90315 inhabitants)
45 Km NW of Siena (53903 inhabitants)
50 Km E of Lucca (89046 inhabitants)
55 Km E of Pisa (89158 inhabitants)
64 Km E of Livorno (159219 inhabitants)
68 Km W of Arezzo (99543 inhabitants)
70 Km E of Viareggio (62467 inhabitants)
86 Km E of Massa (69479 inhabitants)
91 Km SW of Imola (69797 inhabitants)
91 Km E of Carrara (63133 inhabitants)
93 Km SW of Faenza (58541 inhabitants)
93 Km S of Bologna (386663 inhabitants)
98 Km SW of Forlì (117913 inhabitants)
Recent and historical Seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the last three days (72 hours)

Earthquakes of the last three days (72 hours)

This map reports the earthquake epicenters located in the past 72 hours (3 days) from the time this page has been generated. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the last 90 days

Earthquakes of the last 90 days

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1985

Earthquakes since 1985

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2014

Earthquakes since 1000 AD until 2014

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows 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
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 2.0 2019-01-27
08:24:22
43.68 11.09 7 2019-01-27
08:29:52
Sala Sismica INGV-Roma 64995121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-01-27 08:24:22 ± 0.1
Latitude 43.68 ± 0.00
Longitude 11.09 ± 0.01
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 64995121

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 695
Semi-minor axis of confidence ellipse (meter) 444
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 90
Circular confidence region, given by single value of horizontal uncertainty (meter) 690
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 133
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.52251
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:2

Field Value
Value 2
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 64995121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-01-27 08:29:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.BDI.HHZ. 2019-01-27T08:24:41.50 0.1 undecidable manual S 318 0.5225 50 0.17 93
IV.SEI.HHZ. 2019-01-27T08:24:38.29 0.1 undecidable manual S 27 0.4245 50 -0.15 95
GU.POPM.HHZ. 2019-01-27T08:24:38.84 0.1 undecidable manual S 327 0.4371 50 0.04 97
IV.PII.HHZ. 2019-01-27T08:24:37.44 0.1 undecidable manual S 276 0.4074 50 -0.49 89
IV.MTCR.EHZ. 2019-01-27T08:24:36.20 0.1 undecidable manual S 350 0.3552 50 -0.18 96
IV.TRIF.CHZ. 2019-01-27T08:24:36.10 3.0 undecidable manual P 0.18 0
IV.MOCL.EHZ. 2019-01-27T08:24:35.53 0.1 undecidable manual S 12 0.3345 101 -0.18 96
IV.BDI.HHZ. 2019-01-27T08:24:34.23 0.6 undecidable manual P 318 0.5225 50 0.82 38
IV.MPPT.EHZ. 2019-01-27T08:24:33.54 0.1 undecidable manual S 1 0.2797 103 -0.12 98
GU.POPM.HHZ. 2019-01-27T08:24:32.34 1.0 positive manual P 327 0.4371 50 0.39 22
IV.SEI.HHZ. 2019-01-27T08:24:32.11 0.3 undecidable manual P 27 0.4245 50 0.37 68
IV.PII.HHZ. 2019-01-27T08:24:31.63 0.6 negative manual P 276 0.4074 50 0.19 47
IV.MOCL.EHZ. 2019-01-27T08:24:30.21 1.0 positive manual P 12 0.3345 101 0.05 25
IV.OSSC.HHZ. 2019-01-27T08:24:30.25 0.1 undecidable manual S 143 0.1925 109 -0.19 98
IV.MTCR.EHZ. 2019-01-27T08:24:30.54 0.6 negative manual P 350 0.3552 50 -0.01 50
IV.MPPT.EHZ. 2019-01-27T08:24:29.16 0.1 positive manual P 1 0.2797 103 0.18 97
IV.OSSC.HHZ. 2019-01-27T08:24:27.24 0.1 positive manual P 143 0.1925 109 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHE. ML:2.1 0.0009455 0.36 AML other m 2019-01-27T08:24:30.76
IV.OSSC.HNN. ML:2.2 0.00105 0.36 AML other m 2019-01-27T08:24:30.76
IV.OSSC.HNE. ML:2.2 0.0011055 0.72 AML other m 2019-01-27T08:24:31.75
IV.OSSC.HHN. ML:2.1 0.0009635 0.74 AML other m 2019-01-27T08:24:31.39
IV.MPPT.EHE. ML:2 0.000434 1.4 AML other m 2019-01-27T08:24:34.07
IV.MPPT.EHN. ML:1.8 0.000318 0.24 AML other m 2019-01-27T08:24:34.26
IV.MOCL.EHE. ML:1.8 0.000265 1.32 AML other m 2019-01-27T08:24:36.78
IV.MOCL.EHN. ML:1.6 0.000157 1.06 AML other m 2019-01-27T08:24:36.29
IV.MTCR.EHE. ML:2.1 0.0004285 0.18 AML other m 2019-01-27T08:24:37.14
IV.MTCR.EHN. ML:1.9 0.000284 0.2 AML other m 2019-01-27T08:24:37.80
IV.PII.HHN. ML:1.9 0.0002415 0.32 AML other m 2019-01-27T08:24:39.29
IV.SEI.HHE. ML:2 0.000279 0.24 AML other m 2019-01-27T08:24:39.49
IV.PII.HHE. ML:1.9 0.00025 0.22 AML other m 2019-01-27T08:24:39.50
IV.SEI.HHN. ML:2.4 0.000702 0.88 AML other m 2019-01-27T08:24:39.63
GU.POPM.HHN. ML:2.1 0.000352 0.24 AML other m 2019-01-27T08:24:41.54
GU.POPM.HHE. ML:2 0.0002885 1.16 AML other m 2019-01-27T08:24:42.68
IV.BDI.HHN. ML:2 0.000209 0.16 AML other m 2019-01-27T08:24:44.83
IV.BDI.HHE. ML:1.9 0.00016 0.4 AML other m 2019-01-27T08:24:44.66
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Focal Mechanisms

Focal Mechanisms

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://cnt.rm.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol 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 full SEED format Download