Earthquake with magnitude of ML 0.9 on date 22-09-2021 and time 14:16:18 (Italy) in region 3 km S Calice al Cornoviglio (SP)

A magnitude ML 0.9 earthquake occured in region: 3 km S Calice al Cornoviglio (SP), on

  • 22-09-2021 12:16:18 (UTC)
  • 22-09-2021 14:16:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.221, 9.841 at 9 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
Calice al Cornoviglio SP 3 1138 1138
Bolano SP 6 7813 8951
Beverino SP 6 2429 11380
Follo SP 7 6337 17717
Rocchetta di Vara SP 8 703 18420
Podenzana MS 8 2180 20600
Santo Stefano di Magra SP 9 9360 29960
Tresana MS 9 2044 32004
Brugnato SP 9 1270 33274
Vezzano Ligure SP 9 7356 40630
Riccò del Golfo di Spezia SP 9 3698 44328
Borghetto di Vara SP 9 938 45266
Zignago SP 10 532 45798
Pignone SP 10 565 46363
Aulla MS 10 11263 57626
Villafranca in Lunigiana MS 12 4770 62396
Mulazzo MS 13 2424 64820
La Spezia SP 13 93959 158779
Arcola SP 13 10607 169386
Filattiera MS 15 2309 171695
Carrodano SP 15 503 172198
Sarzana SP 15 21976 194174
Sesta Godano SP 15 1377 195551
Riomaggiore SP 16 1576 197127
Vernazza SP 16 848 197975
Zeri MS 16 1094 199069
Bagnone MS 16 1887 200956
Licciana Nardi MS 17 4949 205905
Monterosso al Mare SP 17 1464 207369
Lerici SP 17 10228 217597
Fosdinovo MS 17 4883 222480
Pontremoli MS 18 7357 229837
Portovenere SP 18 3630 233467
Levanto SP 19 5499 238966
Carro SP 19 545 239511
Ameglia SP 20 4365 243876
Castelnuovo Magra SP 20 8415 252291

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km N of La Spezia (93959 inhabitants)
26 Km NW of Carrara (63133 inhabitants)
32 Km NW of Massa (69479 inhabitants)
51 Km NW of Viareggio (62467 inhabitants)
67 Km NW of Lucca (89046 inhabitants)
72 Km NW of Pisa (89158 inhabitants)
75 Km E of Genova (586655 inhabitants)
75 Km SW of Parma (192836 inhabitants)
82 Km SW of Reggio nell'Emilia (171345 inhabitants)
83 Km NW of Livorno (159219 inhabitants)
92 Km W of Pistoia (90315 inhabitants)
93 Km S of Piacenza (102191 inhabitants)
98 Km W of Modena (184973 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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
Reviewed
Rev100
ML 0.9 2021-09-22
12:16:18
44.2208 9.8408 9 2021-09-22
12:25:21
Sala Sismica INGV-Roma 95739031
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-22 12:16:18 ± 0.11
Latitude 44.2208 ± 0.0099
Longitude 9.8408 ± 0.0075
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95739031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 991
Semi-minor axis of confidence ellipse (meter) 586
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 183
Circular confidence region, given by single value of horizontal uncertainty (meter) 990
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 115
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.61424
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 95739031
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-22 12:25:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
MN.TIR.HHZ. 2021-09-22T12:18:37.14 3.0 positive manual Pg 23.23 0
IV.MCRV.HHZ. 2021-09-22T12:18:31.03 3.0 undecidable manual Sn -6.78 0
IV.CERA.HNZ. 2021-09-22T12:18:20.70 3.0 undecidable manual Sg 12.02 0
IV.PTRJ.HNZ. 2021-09-22T12:18:07.59 3.0 undecidable manual Sn -9.99 0
MN.TRI.HHZ. 2021-09-22T12:18:01.42 3.0 undecidable manual Sg 15.42 0
IV.PP3.EHZ. 2021-09-22T12:17:47.69 3.0 undecidable manual Sg 7.89 0
IV.RCAV.EHZ. 2021-09-22T12:17:40.22 3.0 undecidable manual Sn -9.99 0
CR.ZAG.BHZ. 2021-09-22T12:17:40.00 3.0 undecidable manual Pg 11.72 0
IV.PTRJ.HNZ. 2021-09-22T12:17:32.98 3.0 positive manual Pg 6.46 0
IV.ARVD.HHZ. 2021-09-22T12:17:30.74 3.0 undecidable manual Sg 3.15 0
IV.ATCC.EHZ. 2021-09-22T12:17:21.82 3.0 undecidable manual Sn -3.94 0
GU.LSD.HHZ. 2021-09-22T12:17:18.63 3.0 undecidable manual Sn -2.16 0
IV.AGLI.HHZ. 2021-09-22T12:17:07.17 3.0 undecidable manual Pg 0.09 0
IV.ZEN8.EHZ. 2021-09-22T12:17:05.44 3.0 undecidable manual Sn 0.22 0
MN.TRI.HHZ. 2021-09-22T12:17:03.23 3.0 positive manual Pn -4.47 0
IV.CADC.EHZ. 2021-09-22T12:16:57.90 3.0 undecidable manual Sn 0.66 0
SI.MOSI.HHZ. 2021-09-22T12:16:55.64 3.0 negative manual Pn -1.1 0
GU.GORR.HHZ. 2021-09-22T12:16:37.52 0.6 undecidable manual S 315 0.5495 50 -0.41 44
IV.BOB.HHE. 2021-09-22T12:16:31.33 0.1 undecidable manual P 333 0.6142 50 0.44 86
GU.GRAM.HHZ. 2021-09-22T12:16:30.45 0.6 undecidable manual S 31 0.313 50 -0.48 45
GU.GORR.HHZ. 2021-09-22T12:16:29.68 1.0 undecidable manual P 315 0.5495 50 -0.11 23
IV.MSSA.HHZ. 2021-09-22T12:16:28.38 0.6 undecidable manual S 292 0.25 107 -0.39 47
GU.EQUI.HHZ. 2021-09-22T12:16:27.42 0.6 undecidable manual S 104 0.2302 109 -0.61 44
GU.FIVI.HNE. 2021-09-22T12:16:27.12 0.6 undecidable manual S 85 0.2059 111 -0.02 51
IV.PLMA.HHZ. 2021-09-22T12:16:25.66 0.6 undecidable manual S 177 0.1709 115 -0.25 49
GU.GRAM.HHZ. 2021-09-22T12:16:25.86 0.1 undecidable manual P 31 0.313 50 0.12 98
GU.EQUI.HHZ. 2021-09-22T12:16:24.12 1.0 positive manual P 104 0.2302 109 0.05 25
IV.MSSA.HHZ. 2021-09-22T12:16:24.57 0.1 undecidable manual P 292 0.25 107 0.08 100
GU.FIVI.HNE. 2021-09-22T12:16:23.86 0.1 undecidable manual P 85 0.2059 111 0.3 96
IV.PLMA.HHZ. 2021-09-22T12:16:23.04 0.3 positive manual P 177 0.1709 115 0.19 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PLMA.HHE. ML:1 7.415E-5 0.16 AML other m 2021-09-22T12:16:25.72
IV.PLMA.HHN. ML:1.1 0.000112 1.62 AML other m 2021-09-22T12:16:26.11
GU.EQUI.HHE. ML:0.6 2.4141105E-5 0.1216 AML other m 2021-09-22T12:16:28.04
GU.EQUI.HHN. ML:0.5 2.221044E-5 0.0768 AML other m 2021-09-22T12:16:27.89
GU.GRAM.HHE. ML:1 4.2336795E-5 0.2624 AML other m 2021-09-22T12:16:31.94
GU.GRAM.HHN. ML:0.9 3.5351485E-5 0.1792 AML other m 2021-09-22T12:16:26.78
GU.GORR.HHE. ML:0.9 1.4271349E-5 0.2368 AML other m 2021-09-22T12:16:40.07
GU.GORR.HHN. ML:0.7 1.11694365E-5 0.8192 AML other m 2021-09-22T12:16:38.25
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