Earthquake with magnitude of ML 1.5 on date 04-04-2020 and time 12:44:33 (Italy) in region 3 km SW Villafranca in Lunigiana (MS)

A magnitude ML 1.5 earthquake occured in region: 3 km SW Villafranca in Lunigiana (MS), on

  • 04-04-2020 10:44:33 (UTC)
  • 04-04-2020 12:44:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.27, 9.94 at 8 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
Villafranca in Lunigiana MS 3 4770 4770
Tresana MS 3 2044 6814
Mulazzo MS 7 2424 9238
Podenzana MS 7 2180 11418
Aulla MS 7 11263 22681
Bagnone MS 7 1887 24568
Filattiera MS 7 2309 26877
Licciana Nardi MS 8 4949 31826
Calice al Cornoviglio SP 9 1138 32964
Bolano SP 9 7813 40777
Santo Stefano di Magra SP 12 9360 50137
Follo SP 13 6337 56474
Pontremoli MS 13 7357 63831
Rocchetta di Vara SP 15 703 64534
Vezzano Ligure SP 15 7356 71890
Fivizzano MS 15 7925 79815
Zignago SP 15 532 80347
Beverino SP 16 2429 82776
Comano MS 16 714 83490
Fosdinovo MS 16 4883 88373
Zeri MS 17 1094 89467
Arcola SP 17 10607 100074
Brugnato SP 17 1270 101344
Sarzana SP 17 21976 123320
Borghetto di Vara SP 18 938 124258
Riccò del Golfo di Spezia SP 19 3698 127956
Pignone SP 20 565 128521
La Spezia SP 20 93959 222480
Castelnuovo Magra SP 20 8415 230895

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km NE of La Spezia (93959 inhabitants)
25 Km NW of Carrara (63133 inhabitants)
30 Km NW of Massa (69479 inhabitants)
51 Km NW of Viareggio (62467 inhabitants)
65 Km NW of Lucca (89046 inhabitants)
67 Km SW of Parma (192836 inhabitants)
72 Km NW of Pisa (89158 inhabitants)
73 Km SW of Reggio nell'Emilia (171345 inhabitants)
82 Km E of Genova (586655 inhabitants)
85 Km NW of Livorno (159219 inhabitants)
87 Km W of Pistoia (90315 inhabitants)
89 Km W of Modena (184973 inhabitants)
90 Km S of Piacenza (102191 inhabitants)
95 Km SW of Carpi (70699 inhabitants)
97 Km S of Cremona (71901 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 1.5 2020-04-04
10:44:33
44.27 9.94 8 2020-04-04
10:59:15
Sala Sismica INGV-Roma 77867311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-04 10:44:33 ± 0.13
Latitude 44.27 ± 0.02
Longitude 9.94 ± 0.01
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 77867311

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2272
Semi-minor axis of confidence ellipse (meter) 228
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 26
Circular confidence region, given by single value of horizontal uncertainty (meter) 2270
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 155
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.1385
Epicentral distance of station farthest from the epicenter (degree) 0.73385
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 77867311
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-04 10:59:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.POPM.HHZ. 2020-04-04T10:44:55.47 0.6 undecidable manual S 110 0.6277 50 0.31 43
GU.MAIM.HHZ. 2020-04-04T10:44:52.34 0.6 undecidable manual S 131 0.5315 50 0.03 46
GU.CARD.HHZ. 2020-04-04T10:44:50.28 0.6 undecidable manual S 122 0.4587 50 0.13 46
GU.RNCA.HHE. 2020-04-04T10:44:47.81 0.1 undecidable manual P 286 0.7338 50 0.01 89
IV.PII.HHZ. 2020-04-04T10:44:47.07 0.6 negative manual P 142 0.6889 50 0.04 45
GU.POPM.HHZ. 2020-04-04T10:44:46.15 0.3 negative manual P 110 0.6277 50 0.17 66
MN.VLC.HHZ. 2020-04-04T10:44:46.39 0.6 undecidable manual S 108 0.3381 50 -0.21 46
GU.GORR.HHN. 2020-04-04T10:44:45.12 0.1 undecidable manual P 307 0.572 50 0.09 90
GU.MAIM.HHZ. 2020-04-04T10:44:44.69 0.1 undecidable manual P 131 0.5315 50 0.36 86
GU.CARD.HHZ. 2020-04-04T10:44:42.66 0.3 undecidable manual P 122 0.4587 50 -0.42 65
MN.VLC.HHZ. 2020-04-04T10:44:40.48 0.3 negative manual P 108 0.3381 50 -0.55 64
GU.FIVI.HNZ. 2020-04-04T10:44:39.74 0.6 undecidable manual S 102 0.1385 118 0.31 47
GU.EQUI.HHZ. 2020-04-04T10:44:37.64 0.1 undecidable manual P 123 0.1844 111 -0.19 96
GU.FIVI.HNZ. 2020-04-04T10:44:36.91 0.1 undecidable manual P 102 0.1385 118 0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
MN.VLC.HHN. ML:1.4 9.047982E-5 0.2368 AML other m 2020-04-04T10:44:46.42
MN.VLC.HNN. ML:1.5 0.000108575195 0.3776 AML other m 2020-04-04T10:44:46.42
MN.VLC.HNE. ML:1.3 7.0308985E-5 0.3776 AML other m 2020-04-04T10:44:48.61
MN.VLC.HHE. ML:1.4 8.9872755E-5 0.6592 AML other m 2020-04-04T10:44:49.21
GU.CARD.HHN. ML:1.7 0.00012222705 0.16 AML other m 2020-04-04T10:44:51.14
GU.CARD.HHE. ML:1.6 0.00011213356 0.1216 AML other m 2020-04-04T10:44:55.77
GU.POPM.HHN. ML:1.7 8.761355E-5 0.1792 AML other m 2020-04-04T10:44:56.62
GU.POPM.HHE. ML:1.7 8.2384545E-5 0.1792 AML other m 2020-04-04T10:44:56.80
IV.PII.HHN. ML:1.6 5.9542895E-5 0.256 AML other m 2020-04-04T10:45:03.84
IV.PII.HHE. ML:1.6 6.216564E-5 0.2048 AML other m 2020-04-04T10:45:02.04
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