Earthquake (controlled explosion) with magnitude of ML 1.4 on date 10-05-2016 and time 10:08:42 (UTC) in region Costa Toscana settentrionale (Massa Carrara, Lucca, Pisa)

A magnitude ML 1.4 (controlled explosion) earthquake occured in region: Costa Toscana settentrionale (Massa Carrara, Lucca, Pisa), on

  • 10-05-2016 10:08:42 (UTC)
  • 10-05-2016 12:08:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.9400, 9.8800 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: controlled explosion.

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
Portovenere SP 13 3630 3630
Ameglia SP 15 4365 7995
Lerici SP 16 10228 18223
La Spezia SP 19 93959 112182
Arcola SP 20 10607 122789

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km S of La Spezia (93959 inhabitants)
23 Km SW of Carrara (63133 inhabitants)
24 Km W of Massa (69479 inhabitants)
31 Km W of Viareggio (62467 inhabitants)
49 Km NW of Pisa (89158 inhabitants)
51 Km W of Lucca (89046 inhabitants)
55 Km NW of Livorno (159219 inhabitants)
83 Km W of Pistoia (90315 inhabitants)
92 Km SE of Genova (586655 inhabitants)
98 Km W of Prato (191150 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 1.4 2016-05-10
10:08:42
43.9397 9.8802 1 2016-11-08
11:48:46
Bollettino Sismico Italiano INGV 25288421
Reviewed
Rev100
Md 1.1
ML 1.5
2016-05-10
10:08:43
43.9648 9.9068 8 2016-05-10
11:31:10
Sala Sismica INGV-Roma 24990431
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-05-10 10:08:42 ± 0.24
Latitude 43.9397 ± 0.0126
Longitude 9.8802 ± 0.0225
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type controlled explosion
Origin ID 25288421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1780
Semi-minor axis of confidence ellipse (meter) 1380
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 258
Circular confidence region, given by single value of horizontal uncertainty (meter) 1780.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 146
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.11152
Epicentral distance of station farthest from the epicenter (degree) 0.56747
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.1
Num. used stations 1
Type of magnitude ML
Reference to an origin 25288421
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2016-07-29 14:05:08

ML:1.5

Field Value
Value 1.5
Uncertainty 0.1
Num. used stations 1
Type of magnitude ML
Reference to an origin 24990431
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-05-10 11:31:10

Md:1.1

Field Value
Value 1.1
Uncertainty 0.0
Num. used stations 1
Type of magnitude Md
Reference to an origin 24990431
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-05-10 11:31:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GROG.HHZ. 2016-05-10T10:08:54.26 0.3 undecidable manual P 179 56.9985 91 0.03 72
GU.GRAM.HHZ. 2016-05-10T10:08:54.73 0.6 undecidable manual P 13 62.9925 50 -0.56 42
GU.MAIM.HHZ. 2016-05-10T10:08:53.24 1.0 undecidable manual P 93 48.9177 91 0.62 21
IV.MSSA.HHZ. 2016-05-10T10:08:52.69 0.1 undecidable manual P 325 50.8158 91 -0.3 92
MN.VLC.HHE. 2016-05-10T10:08:51.95 0.3 undecidable manual P 59 47.1195 91 -0.31 69
GU.EQUI.HHE. 2016-05-10T10:08:49.51 0.1 undecidable manual P 41 33.2445 91 0.04 100
IV.PLMA.HHZ. 2016-05-10T10:08:45.86 0.1 positive manual P 350 12.3765 92 0.56 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PLMA.HHE. ML:1.4 0.000361 0.8 AML other m 2016-05-10T10:08:56.97
IV.PLMA.HHN. ML:1.5 0.000438 0.96 AML other m 2016-05-10T10:09:13.51
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