Earthquake with magnitude of ML 1.4 on date 20-11-2021 and time 23:02:29 (UTC) in region 8 km NE Pontremoli (MS)

A magnitude ML 1.4 earthquake occured in region: 8 km NE Pontremoli (MS), on

  • 20-11-2021 23:02:29 (UTC)
  • 21-11-2021 00:02:29 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.4390, 9.9300 at 8 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
Pontremoli MS 8 7357 7357
Berceto PR 9 2109 9466
Filattiera MS 12 2309 11775
Mulazzo MS 13 2424 14199
Corniglio PR 13 1936 16135
Borgo Val di Taro PR 14 6999 23134
Bagnone MS 15 1887 25021
Valmozzola PR 15 539 25560
Monchio delle Corti PR 16 933 26493
Zeri MS 16 1094 27587
Villafranca in Lunigiana MS 16 4770 32357
Albareto PR 18 2156 34513

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km N of La Spezia (93959 inhabitants)
42 Km NW of Carrara (63133 inhabitants)
48 Km NW of Massa (69479 inhabitants)
51 Km SW of Parma (192836 inhabitants)
63 Km W of Reggio nell'Emilia (171345 inhabitants)
68 Km NW of Viareggio (62467 inhabitants)
71 Km S of Piacenza (102191 inhabitants)
78 Km S of Cremona (71901 inhabitants)
79 Km E of Genova (586655 inhabitants)
80 Km NW of Lucca (89046 inhabitants)
82 Km W of Modena (184973 inhabitants)
85 Km W of Carpi (70699 inhabitants)
89 Km NW of Pisa (89158 inhabitants)
97 Km NW of Pistoia (90315 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 2021-11-20
23:02:29
44.4387 9.9297 9 2022-03-30
13:04:24
Bollettino Sismico Italiano INGV 99002471
Reviewed
Rev100
ML 2.0 2021-11-20
23:02:29
44.4152 9.9352 6 2021-11-20
23:09:01
Sala Sismica INGV-Roma 97642371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-20 23:02:29 ± 0.1
Latitude 44.4387 ± 0.0054
Longitude 9.9297 ± 0.0063
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99002471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 529
Semi-minor axis of confidence ellipse (meter) 480
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 33
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 22
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.69877
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 97642371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-20 23:09:01

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 10
Type of magnitude ML
Reference to an origin 99002471
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-24 17:53:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LRP.EHZ. 2021-11-20T23:04:21.00 3.0 undecidable manual Sn 1.98 0
IV.GIZZ.HHZ. 2021-11-20T23:04:16.93 3.0 negative manual P 0.58 0
IV.CMPR.HHZ. 2021-11-20T23:04:14.42 3.0 undecidable manual P 1.841 0
IV.MNTT.EHZ. 2021-11-20T23:04:12.31 3.0 undecidable manual Sg 14.12 0
IV.VAGA.HHZ. 2021-11-20T23:03:40.10 3.0 negative manual P 2.77 0
MN.TRI.HHZ. 2021-11-20T23:03:29.28 3.0 positive manual P 1.066 0
IV.MONC.HHZ. 2021-11-20T23:03:18.33 3.0 undecidable manual S -0.45 0
IV.CRTC.HHZ. 2021-11-20T23:03:12.27 3.0 positive manual P 4.41 0
IV.FIR.HHZ. 2021-11-20T23:03:11.45 3.0 undecidable manual S -1.85 0
GU.RNCA.HHZ. 2021-11-20T23:02:53.71 0.6 undecidable manual S 273 77.5668 50 0.11 44
GU.GSCL.HHN. 2021-11-20T23:02:47.55 0.6 undecidable manual S 100 53.1024 50 0.47 43
GU.GORR.HHN. 2021-11-20T23:02:46.61 0.6 undecidable manual S 291 53.7018 50 -0.63 40
GU.SARM.EHE. 2021-11-20T23:02:45.40 0.6 undecidable manual S 127 46.9197 50 -0.01 47
GU.RNCA.HHZ. 2021-11-20T23:02:44.04 0.3 undecidable manual P 273 77.5668 50 0.47 61
IV.PLMA.HHZ. 2021-11-20T23:02:44.08 0.3 undecidable manual S 188 43.5231 50 -0.45 65
IV.ERBM.EHE. 2021-11-20T23:02:43.60 0.6 undecidable manual S 93 38.3283 50 0.47 44
IV.MSSA.HHZ. 2021-11-20T23:02:42.87 0.3 undecidable manual S 248 35.4423 50 0.52 65
GU.EQUI.HHZ. 2021-11-20T23:02:41.76 0.6 undecidable manual S 150 35.0427 50 -0.5 44
GU.GSCL.HHN. 2021-11-20T23:02:40.28 0.6 undecidable manual P 100 53.1024 50 0.48 42
GU.FIVI.HNE. 2021-11-20T23:02:39.96 0.6 undecidable manual S 145 27.0507 107 0.24 47
GU.GORR.HHN. 2021-11-20T23:02:39.87 0.6 undecidable manual P 291 53.7018 50 -0.03 47
IV.BOB.HNE. 2021-11-20T23:02:39.52 0.3 undecidable manual P 314 52.7028 50 -0.22 67
IV.PLMA.HHZ. 2021-11-20T23:02:38.24 0.1 undecidable manual P 188 43.5231 50 -0.09 94
GU.SARM.EHE. 2021-11-20T23:02:38.61 0.3 undecidable manual P 127 46.9197 50 -0.23 68
IV.ERBM.EHE. 2021-11-20T23:02:37.40 0.3 undecidable manual P 93 38.3283 50 -0.13 71
IV.MSSA.HHZ. 2021-11-20T23:02:37.14 0.1 undecidable manual P 248 35.4423 50 0.07 96
GU.EQUI.HHZ. 2021-11-20T23:02:36.89 0.3 undecidable manual P 150 35.0427 50 -0.13 71
IV.NEVI.HNN. 2021-11-20T23:02:36.80 0.3 undecidable manual P 62 34.5432 50 -0.14 71
GU.FIVI.HNE. 2021-11-20T23:02:35.72 0.3 undecidable manual P 145 27.0507 107 0.16 71
GU.GRAM.HHZ. 2021-11-20T23:02:34.80 0.6 undecidable manual S 62 12.1767 125 -0.22 48
GU.GRAM.HHZ. 2021-11-20T23:02:32.79 0.1 positive manual P 62 12.1767 125 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.GRAM.HHN. ML:2.0 0.00118 0.18 AML other m 2021-11-20T23:02:35.20
GU.GRAM.HHE. ML:2.1 0.001515 0.42 AML other m 2021-11-20T23:02:35.77
IV.MSSA.HHN. ML:2.4 0.0010049999999999998 0.12 AML other m 2021-11-20T23:02:43.09
IV.MSSA.HHE. ML:2.4 0.0011400000000000002 0.1 AML other m 2021-11-20T23:02:43.14
IV.PLMA.HHE. ML:1.2 0.00005735 0.32 AML other m 2021-11-20T23:02:44.56
IV.PLMA.HHN. ML:1.3 0.00006185 0.16 AML other m 2021-11-20T23:02:44.79
GU.RNCA.HHE. ML:1.4 0.00003293857 0.4224 AML other m 2021-11-20T23:02:57.72
GU.RNCA.HHN. ML:1.2 0.000025415456500000002 0.2048 AML other m 2021-11-20T23:02:58.38
IV.PII.HHE. ML:1.1 0.00001398244 0.2432 AML other m 2021-11-20T23:03:01.29
IV.PII.HHN. ML:1.1 0.000013780352999999999 0.2688 AML other m 2021-11-20T23:03:02.75
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
Waveforms Seismic signals in miniseed + resp format Download