Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 21-11-2021 and time 02:19:39 (UTC) in region 5 km SW Varsi (PR)

A magnitude ML 1.3 earthquake occured in region: 5 km SW Varsi (PR), on

  • 21-11-2021 02:19:39 (UTC)
  • 21-11-2021 03:19:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.6280, 9.8080 at 7 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Varsi PR 5 1230 1230
Bardi PR 6 2227 3457
Valmozzola PR 9 539 3996
Bore PR 10 749 4745
Morfasso PC 13 1024 5769
Solignano PR 14 1773 7542
Pellegrino Parmense PR 15 1048 8590
Borgo Val di Taro PR 16 6999 15589
Varano de' Melegari PR 18 2676 18265
Compiano PR 19 1112 19377
Vernasca PC 19 2131 21508
Berceto PR 19 2109 23617
Bedonia PR 20 3482 27099

Municipalities with at least 50000 inhabitants

An earthquake occurred to
46 Km W of Parma (192836 inhabitants)
48 Km S of Piacenza (102191 inhabitants)
58 Km N of La Spezia (93959 inhabitants)
59 Km SW of Cremona (71901 inhabitants)
65 Km NW of Carrara (63133 inhabitants)
66 Km W of Reggio nell'Emilia (171345 inhabitants)
71 Km NW of Massa (69479 inhabitants)
73 Km E of Genova (586655 inhabitants)
80 Km SE of Pavia (72576 inhabitants)
87 Km W of Carpi (70699 inhabitants)
89 Km W of Modena (184973 inhabitants)
92 Km NW of Viareggio (62467 inhabitants)
99 Km E of Alessandria (93943 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 1.3 2021-11-21
02:19:39		 44.6277 9.8082 7 2022-03-30
13:04:23		 Bollettino Sismico Italiano INGV 98822061
Reviewed
Rev100 		ML 1.5 2021-11-21
02:19:39		 44.6687 9.8603 10 2021-11-21
02:28:11		 Sala Sismica INGV-Roma 97645821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-21 02:19:39 ± 0.14
Latitude 44.6277 ± 0.0117
Longitude 9.8082 ± 0.0076
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 98822061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1314
Semi-minor axis of confidence ellipse (meter) 517
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 15
Circular confidence region, given by single value of horizontal uncertainty (meter) 1310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 177
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.63042
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 98822061
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-08 16:31:30

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 97645821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-21 02:28:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
OT.OT17.EHZ. 2021-11-21T02:21:06.81 3.0 positive manual Pg 9.53 0
IV.APEC.HHZ. 2021-11-21T02:20:51.38 3.0 undecidable manual Sg 2.93 0
IV.CRTC.HHZ. 2021-11-21T02:20:51.93 3.0 undecidable manual Sg -1.29 0
IV.MMUR.HNZ. 2021-11-21T02:20:28.12 3.0 undecidable manual Pg 4.38 0
GU.RNCA.HHZ. 2021-11-21T02:20:02.20 0.6 undecidable manual S 256 69.9744 50 0.26 45
GU.GSCL.HHN. 2021-11-21T02:20:02.10 0.6 undecidable manual S 116 68.9754 50 0.42 44
GU.SARM.EHN. 2021-11-21T02:20:01.50 0.6 undecidable manual S 136 67.9764 50 0.06 47
IV.PLMA.HHZ. 2021-11-21T02:20:00.00 0.6 undecidable manual S 177 64.1913 50 -0.41 44
GU.EQUI.HHZ. 2021-11-21T02:19:58.72 0.6 undecidable manual S 152 58.0974 50 -0.05 48
IV.MDI.HHZ. 2021-11-21T02:19:58.73 3.0 undecidable manual P -1.07 0
IV.ERBM.EHE. 2021-11-21T02:19:57.90 1.0 undecidable manual S 116 53.1024 50 0.45 23
IV.SGAL.EHZ. 2021-11-21T02:19:56.92 3.0 negative manual P -1.01 0
GU.GORR.HHZ. 2021-11-21T02:19:54.60 0.3 undecidable manual S 267 40.7259 50 0.44 68
IV.MSSA.HHZ. 2021-11-21T02:19:54.80 0.6 undecidable manual S 214 41.5251 50 0.44 45
GU.SARM.EHN. 2021-11-21T02:19:52.30 1.0 undecidable manual P 136 67.9764 50 -0.02 24
GU.RNCA.HHZ. 2021-11-21T02:19:52.48 0.3 undecidable manual P 256 69.9744 50 -0.13 69
GU.GSCL.HHN. 2021-11-21T02:19:52.90 0.6 undecidable manual P 116 68.9754 50 0.44 44
IV.BOB.HHE. 2021-11-21T02:19:51.80 0.3 undecidable manual S 299 32.3454 102 0.45 69
IV.PLMA.HHZ. 2021-11-21T02:19:51.43 0.6 undecidable manual P 177 64.1913 50 -0.3 45
GU.EQUI.HHZ. 2021-11-21T02:19:50.07 0.6 undecidable manual P 152 58.0974 50 -0.71 40
GU.GRAM.HHZ. 2021-11-21T02:19:49.62 0.6 undecidable manual S 127 25.3524 105 0.63 43
IV.ERBM.EHE. 2021-11-21T02:19:49.66 0.6 undecidable manual P 116 53.1024 50 -0.36 45
IV.MSSA.HHZ. 2021-11-21T02:19:48.22 0.1 undecidable manual P 214 41.5251 50 -0.01 100
GU.GORR.HHZ. 2021-11-21T02:19:47.71 0.3 undecidable manual P 267 40.7259 50 -0.41 69
IV.BOB.HHE. 2021-11-21T02:19:45.97 0.3 undecidable manual P 299 32.3454 102 -0.53 68
GU.GRAM.HHZ. 2021-11-21T02:19:44.99 0.3 undecidable manual P 127 25.3524 105 -0.14 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.GRAM.HHN. ML:1.6 0.00022045494999999997 0.3408 AML other m 2021-11-21T02:19:50.32
GU.GRAM.HHE. ML:1.6 0.0002235 0.14 AML other m 2021-11-21T02:19:51.13
GU.GORR.HHN. ML:1.1 0.00004685 1.24 AML other m 2021-11-21T02:19:55.65
IV.MSSA.HHE. ML:1.3 0.00006261889499999999 1.9216 AML other m 2021-11-21T02:19:55.46
IV.MSSA.HHN. ML:1.5 0.00010677805 0.8608 AML other m 2021-11-21T02:19:55.94
GU.GORR.HHE. ML:0.9 0.0000317 1.34 AML other m 2021-11-21T02:19:56.29
IV.PLMA.HHE. ML:0.9 0.00001505242 3.1808 AML other m 2021-11-21T02:20:01.33
IV.PLMA.HHN. ML:0.9 0.000015902924999999998 2.04 AML other m 2021-11-21T02:20:00.75
GU.RNCA.HHN. ML:1.3 0.000035866495 3.44 AML other m 2021-11-21T02:20:03.24
GU.RNCA.HHE. ML:1.5 0.000049358175 1.1616 AML other m 2021-11-21T02:20:05.17
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