Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 26-04-2021 and time 05:09:21 (Italy) in region 4 km NW Albareto (PR)

A magnitude ML 1.2 earthquake occured in region: 4 km NW Albareto (PR), on

  • 26-04-2021 03:09:21 (UTC)
  • 26-04-2021 05:09:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.4640, 9.6630 at 10 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.

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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
Albareto PR 4 2156 2156
Compiano PR 4 1112 3268
Tornolo PR 4 1010 4278
Bedonia PR 5 3482 7760
Borgo Val di Taro PR 9 6999 14759
Varese Ligure SP 11 2059 16818
Zeri MS 15 1094 17912
Maissana SP 17 616 18528
Sesta Godano SP 19 1377 19905
Santo Stefano d'Aveto GE 19 1126 21031
Bardi PR 20 2227 23258
Pontremoli MS 20 7357 30615

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km NW of La Spezia (93959 inhabitants)
55 Km NW of Carrara (63133 inhabitants)
58 Km E of Genova (586655 inhabitants)
61 Km NW of Massa (69479 inhabitants)
65 Km SW of Parma (192836 inhabitants)
66 Km S of Piacenza (102191 inhabitants)
80 Km SW of Cremona (71901 inhabitants)
81 Km W of Reggio nell'Emilia (171345 inhabitants)
81 Km NW of Viareggio (62467 inhabitants)
90 Km SE of Pavia (72576 inhabitants)
95 Km E of Savona (61345 inhabitants)
96 Km NW of Lucca (89046 inhabitants)
97 Km SE 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
Reviewed
Rev100 		ML 1.2 2021-04-26
03:09:21		 44.4637 9.6633 10 2021-04-26
03:20:07		 Sala Sismica INGV-Roma 89484011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-26 03:09:21 ± 0.14
Latitude 44.4637 ± 0.0063
Longitude 9.6633 ± 0.0076
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 89484011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 722
Semi-minor axis of confidence ellipse (meter) 400
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 216
Circular confidence region, given by single value of horizontal uncertainty (meter) 720.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.18076
Epicentral distance of station farthest from the epicenter (degree) 0.50812
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.4
Num. used stations 10
Type of magnitude ML
Reference to an origin 89484011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-26 03:20:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.RNCA.HHE. 2021-04-26T03:09:38.78 0.6 undecidable manual S 271 56.3991 50 0.05 47
GU.EQUI.HHZ. 2021-04-26T03:09:36.97 0.6 undecidable manual S 130 51.0156 50 -0.33 45
IV.PLMA.HHZ. 2021-04-26T03:09:36.73 0.6 undecidable manual S 162 48.3183 50 0.14 47
IV.BOB.HHE. 2021-04-26T03:09:34.22 0.6 undecidable manual S 333 37.8288 50 0.44 45
GU.GORR.HHZ. 2021-04-26T03:09:32.14 0.6 undecidable manual S 299 33.3444 50 -0.45 45
GU.RNCA.HHE. 2021-04-26T03:09:31.83 0.6 undecidable manual P 271 56.3991 50 0.56 42
IV.PLMA.HHZ. 2021-04-26T03:09:30.23 1.0 positive manual P 162 48.3183 50 0.2 23
GU.EQUI.HHZ. 2021-04-26T03:09:30.43 1.0 undecidable manual P 130 51.0156 50 -0.01 24
GU.FIVI.HNE. 2021-04-26T03:09:29.55 0.1 undecidable manual P 124 44.4222 50 0.12 95
IV.MSSA.HHZ. 2021-04-26T03:09:28.75 0.6 undecidable manual S 215 20.0688 117 -0.15 49
IV.BOB.HHE. 2021-04-26T03:09:28.35 0.1 undecidable manual P 333 37.8288 50 -0.06 97
GU.GRAM.HHZ. 2021-04-26T03:09:27.41 0.3 positive manual P 85 31.9458 50 -0.09 73
GU.GORR.HHZ. 2021-04-26T03:09:27.51 0.1 undecidable manual P 299 33.3444 50 -0.21 95
IV.MSSA.HHZ. 2021-04-26T03:09:25.66 0.1 positive manual P 215 20.0688 117 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MSSA.HHE. ML:2.1 0.000962 0.48 AML other m 2021-04-26T03:09:29.73
IV.MSSA.HHN. ML:2.2 0.00107 0.1 AML other m 2021-04-26T03:09:29.73
GU.GORR.HHE. ML:1.2 0.00006405 0.98 AML other m 2021-04-26T03:09:33.24
GU.GRAM.HHE. ML:1.4 0.000108 0.32 AML other m 2021-04-26T03:09:33.39
GU.GORR.HHN. ML:1.2 0.00007555000000000001 0.16 AML other m 2021-04-26T03:09:33.61
GU.GRAM.HHN. ML:1.3 0.00009104999999999999 0.9 AML other m 2021-04-26T03:09:35.92
IV.PLMA.HHE. ML:1.0 0.000028049999999999997 0.24 AML other m 2021-04-26T03:09:38.25
GU.EQUI.HHE. ML:0.9 0.000018849999999999997 0.98 AML other m 2021-04-26T03:09:38.58
IV.PLMA.HHN. ML:1.1 0.000037000000000000005 0.92 AML other m 2021-04-26T03:09:38.39
GU.EQUI.HHN. ML:0.3 0.00000648 0.42 AML other m 2021-04-26T03:09:39.39
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