Earthquake with magnitude of ML 1.8 on date 14-04-2021 and time 03:32:03 (Italy) in region 7 km SW Pomarance (PI)

A magnitude ML 1.8 earthquake occured in region: 7 km SW Pomarance (PI), on

  • 14-04-2021 01:32:03 (UTC)
  • 14-04-2021 03:32:03 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.243, 10.828 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
Pomarance PI 7 5897 5897
Castelnuovo di Val di Cecina PI 8 2231 8128
Monterotondo Marittimo GR 11 1371 9499
Monteverdi Marittimo PI 12 758 10257
Radicondoli SI 17 914 11171
Guardistallo PI 18 1234 12405
Montecatini Val di Cecina PI 18 1749 14154
Volterra PI 18 10519 24673
Casale Marittimo PI 18 1122 25795
Montescudaio PI 19 2144 27939
Bibbona LI 19 3175 31114
Sassetta LI 20 514 31628
Montieri GR 20 1204 32832
Castagneto Carducci LI 20 9010 41842

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km W of Siena (53903 inhabitants)
54 Km SE of Livorno (159219 inhabitants)
58 Km NW of Grosseto (82087 inhabitants)
63 Km SE of Pisa (89158 inhabitants)
64 Km SW of Scandicci (50609 inhabitants)
68 Km SW of Firenze (382808 inhabitants)
72 Km SE of Lucca (89046 inhabitants)
74 Km SW of Prato (191150 inhabitants)
77 Km S of Pistoia (90315 inhabitants)
84 Km SE of Viareggio (62467 inhabitants)
89 Km W of Arezzo (99543 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 1.8 2021-04-14
01:32:03
43.2432 10.8285 6 2021-07-12
16:55:07
Bollettino Sismico Italiano INGV 89350471
Reviewed
Rev100
ML 1.7 2021-04-14
01:32:03
43.2483 10.8367 8 2021-04-14
01:43:37
Sala Sismica INGV-Roma 89081851
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-14 01:32:03 ± 0.12
Latitude 43.2432 ± 0.0081
Longitude 10.8285 ± 0.0111
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 89350471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1021
Semi-minor axis of confidence ellipse (meter) 573
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 219
Circular confidence region, given by single value of horizontal uncertainty (meter) 1020
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.1277
Epicentral distance of station farthest from the epicenter (degree) 1.04861
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 89350471
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-22 08:03:35

ML:1.7

Field Value
Value 1.7
Uncertainty 0.4
Num. used stations 22
Type of magnitude ML
Reference to an origin 89081851
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-14 01:43:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.POPM.HHZ. 2021-04-14T01:32:30.45 0.6 undecidable manual S 356 0.8031 50 -0.26 43
IV.MPPT.EHN. 2021-04-14T01:32:28.30 0.6 undecidable manual S 15 0.7383 50 -0.5 41
IV.RUFI.EHZ. 2021-04-14T01:32:28.93 0.6 undecidable manual S 39 0.7725 50 -0.88 35
GU.MAIM.HHN. 2021-04-14T01:32:27.12 0.6 undecidable manual S 340 0.7123 50 -0.91 35
IV.ARCI.HHZ. 2021-04-14T01:32:24.14 0.6 undecidable manual S 129 0.6133 50 -0.95 35
IV.LMD.HHE. 2021-04-14T01:32:23.96 0.6 undecidable manual P 37 1.0486 50 0.59 37
IV.SFI.HNN. 2021-04-14T01:32:22.88 0.6 undecidable manual P 48 0.9902 50 0.5 39
IV.RONT.HHZ. 2021-04-14T01:32:21.25 0.6 undecidable manual P 30 0.8678 50 0.96 33
IV.RINC.HHN. 2021-04-14T01:32:20.69 0.6 undecidable manual P 41 0.8553 50 0.62 38
IV.MOCL.EHZ. 2021-04-14T01:32:19.97 0.6 undecidable manual P 18 0.8031 50 0.8 36
GU.POPM.HHZ. 2021-04-14T01:32:19.60 0.6 undecidable manual P 356 0.8031 50 0.42 41
TV.SF14.HHN. 2021-04-14T01:32:19.16 0.6 undecidable manual P 130 0.7536 50 0.82 36
IV.MCIV.CHE. 2021-04-14T01:32:19.07 0.6 undecidable manual P 127 0.7743 50 0.38 42
IV.RUFI.EHZ. 2021-04-14T01:32:18.92 0.6 undecidable manual P 39 0.7725 50 0.26 43
IV.MPPT.EHN. 2021-04-14T01:32:18.16 0.6 undecidable manual P 15 0.7383 50 0.09 45
TV.SF04.EHZ. 2021-04-14T01:32:18.52 0.6 undecidable manual P 124 0.7311 50 0.56 40
GU.MAIM.HHN. 2021-04-14T01:32:17.97 0.6 undecidable manual P 340 0.7123 50 0.34 43
IV.ARCI.HHZ. 2021-04-14T01:32:16.25 0.6 undecidable manual P 129 0.6133 50 0.32 44
IV.RIBO.EHZ.01 2021-04-14T01:32:15.56 0.6 undecidable manual S 152 0.3345 100 -0.93 37
IV.PII.HHZ. 2021-04-14T01:32:14.10 0.1 positive manual P 335 0.527 50 -0.35 88
IV.CASP.HHZ. 2021-04-14T01:32:13.06 0.6 undecidable manual P 177 0.4533 50 -0.13 47
IV.FROS.CHZ. 2021-04-14T01:32:12.39 0.6 undecidable manual S 98 0.241 103 -0.58 44
IV.CSNT.HHZ. 2021-04-14T01:32:11.98 0.1 positive manual P 55 0.4065 50 -0.42 89
IV.RIBO.EHZ.01 2021-04-14T01:32:10.79 0.6 undecidable manual P 152 0.3345 100 -0.18 48
IV.TRIF.CHZ. 2021-04-14T01:32:09.13 0.6 undecidable manual S 157 0.1394 112 -0.1 50
IV.FROS.CHZ. 2021-04-14T01:32:08.98 0.1 positive manual P 98 0.241 103 0.05 100
IV.MAGO.CHZ. 2021-04-14T01:32:08.48 0.3 undecidable manual S 284 0.1277 114 -0.34 72
IV.TRIF.CHZ. 2021-04-14T01:32:07.15 0.3 undecidable manual P 157 0.1394 112 0.37 71
IV.MAGO.CHZ. 2021-04-14T01:32:06.68 0.1 positive manual P 284 0.1277 114 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MAGO.CHN. ML:2.8 0.00696 0.1 AML other m 2021-04-14T01:32:08.58
IV.MAGO.CHE. ML:2.7 0.0061478 0.096 AML other m 2021-04-14T01:32:08.64
IV.TRIF.CHE. ML:2.3 0.0019512215 0.104 AML other m 2021-04-14T01:32:10.10
IV.TRIF.CHN. ML:2 0.0011469695 0.12 AML other m 2021-04-14T01:32:10.49
IV.FROS.CHE. ML:1.9 0.0005076473 0.176 AML other m 2021-04-14T01:32:13.17
IV.FROS.CHN. ML:1.9 0.0004553738 0.112 AML other m 2021-04-14T01:32:13.72
IV.CASP.HHE. ML:1.5 7.91E-5 0.46 AML other m 2021-04-14T01:32:15.54
IV.RIBO.EHE.01 ML:1.8 0.00026982105 0.06 AML other m 2021-04-14T01:32:17.32
IV.CSNT.HHN. ML:1.4 8.697998E-5 1.8 AML other m 2021-04-14T01:32:17.93
IV.CSNT.HHE. ML:1.4 8.305E-5 0.14 AML other m 2021-04-14T01:32:18.53
TV.SF04.EHE. ML:1.8 7.979887E-5 0.26 AML other m 2021-04-14T01:32:19.18
TV.SF04.EHN. ML:1.8 7.843999E-5 0.12 AML other m 2021-04-14T01:32:19.67
IV.PII.HHE. ML:1.7 0.000104 1.74 AML other m 2021-04-14T01:32:22.88
IV.PII.HHN. ML:1.7 0.00011415 0.24 AML other m 2021-04-14T01:32:22.75
IV.CASP.HHN. ML:1.3 5.665E-5 1.16 AML other m 2021-04-14T01:32:23.75
IV.ARCI.HHN. ML:1.2 2.2914095E-5 0.14 AML other m 2021-04-14T01:32:25.08
IV.MOCL.EHN. ML:1.7 5.4290715E-5 0.34 AML other m 2021-04-14T01:32:34.52
IV.MOCL.EHE. ML:1.4 3.177671E-5 0.26 AML other m 2021-04-14T01:32:34.51
IV.RONT.HHE. ML:2.1 0.000132 0.24 AML other m 2021-04-14T01:32:35.54
IV.ARCI.HNE. ML:1.8 9.840601E-5 0.48 AML other m 2021-04-14T01:32:22.82
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