Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 01-08-2020 and time 14:52:35 (Italy) in region 4 km NE Rezzoaglio (GE)

A magnitude ML 1.7 earthquake occured in region: 4 km NE Rezzoaglio (GE), on

  • 01-08-2020 12:52:35 (UTC)
  • 01-08-2020 14:52:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.5570, 9.4040 at 9 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
Rezzoaglio GE 4 995 995
Santo Stefano d'Aveto GE 4 1126 2121
Fontanigorda GE 8 277 2398
Ottone PC 9 516 2914
Rovegno GE 10 554 3468
Gorreto GE 10 97 3565
Ferriere PC 13 1294 4859
Montebruno GE 13 240 5099
Fascia GE 13 81 5180
Cerignale PC 14 127 5307
Rondanina GE 15 62 5369
Borzonasca GE 15 2049 7418
Zerba PC 15 77 7495
Favale di Malvaro GE 16 466 7961
Lorsica GE 17 468 8429
Propata GE 17 142 8571
Corte Brugnatella PC 18 586 9157
Bedonia PR 19 3482 12639
Tornolo PR 19 1010 13649
Mezzanego GE 19 1537 15186
Carrega Ligure AL 19 84 15270
Orero GE 19 565 15835
Torriglia GE 20 2311 18146

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km E of Genova (586655 inhabitants)
60 Km SW of Piacenza (102191 inhabitants)
60 Km NW of La Spezia (93959 inhabitants)
73 Km S of Pavia (72576 inhabitants)
74 Km SE of Alessandria (93943 inhabitants)
77 Km NW of Carrara (63133 inhabitants)
78 Km W of Parma (192836 inhabitants)
78 Km E of Savona (61345 inhabitants)
81 Km SW of Cremona (71901 inhabitants)
82 Km NW of Massa (69479 inhabitants)
95 Km SE of Vigevano (63310 inhabitants)
98 Km W of Reggio nell'Emilia (171345 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 1.7 2020-08-01
12:52:35		 44.5568 9.4043 9 2020-11-19
12:36:57		 Bollettino Sismico Italiano INGV 81898411
Reviewed
Rev100 		ML 1.6 2020-08-01
12:52:35		 44.5715 9.3892 10 2020-08-01
12:59:53		 Sala Sismica INGV-Roma 81547111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-01 12:52:35 ± 0.15
Latitude 44.5568 ± 0.0126
Longitude 9.4043 ± 0.0076
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 81898411

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1391
Semi-minor axis of confidence ellipse (meter) 638
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 355
Circular confidence region, given by single value of horizontal uncertainty (meter) 1390.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 103
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 16
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) 0.09443
Epicentral distance of station farthest from the epicenter (degree) 0.90382
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 81898411
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-08-12 07:34:02

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 81547111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-01 12:59:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.CANO.HHZ. 2020-08-01T12:53:05.63 3.0 undecidable manual S 100.3218 0.45 0
IV.QLNO.HHE. 2020-08-01T12:53:02.25 0.6 undecidable manual S 253 87.7455 50 0.44 40
IV.PLMA.HHZ. 2020-08-01T12:52:55.38 0.6 undecidable manual S 147 66.5778 50 -0.8 37
GU.CANO.HHZ. 2020-08-01T12:52:55.05 3.0 undecidable manual P 100.3218 2.43 0
GU.GRAM.HHE. 2020-08-01T12:52:52.51 0.6 undecidable manual S 98 52.8027 50 0.01 47
IV.QLNO.HHE. 2020-08-01T12:52:51.68 0.6 undecidable manual P 253 87.7455 50 1.01 32
GU.EQUI.HHE. 2020-08-01T12:52:48.78 0.6 undecidable manual P 126 73.5708 50 0.29 43
IT.GNV.HGE. 2020-08-01T12:52:48.89 0.6 undecidable manual S 250 39.8268 50 -0.15 47
GU.RNCA.HHZ. 2020-08-01T12:52:47.87 0.3 undecidable manual S 255 37.1295 50 -0.43 67
IV.PLMA.HHZ. 2020-08-01T12:52:47.33 0.6 undecidable manual P 147 66.5778 50 -0.09 45
GU.PCP.HHZ. 2020-08-01T12:52:47.87 0.6 undecidable manual P 269 67.9764 50 0.24 44
GU.GRAM.HHE. 2020-08-01T12:52:45.92 0.6 undecidable manual P 98 52.8027 50 0.63 41
IT.GNV.HGE. 2020-08-01T12:52:43.25 0.6 undecidable manual P 250 39.8268 50 -0.05 48
IV.BOB.HHZ. 2020-08-01T12:52:43.99 0.6 undecidable manual S 8 23.6541 111 -0.24 47
GU.RNCA.HHZ. 2020-08-01T12:52:42.74 0.3 undecidable manual P 255 37.1295 50 -0.13 71
IV.BOB.HHZ. 2020-08-01T12:52:40.40 0.1 positive manual P 8 23.6541 111 -0.12 97
GU.GORR.HHE. 2020-08-01T12:52:40.15 0.3 undecidable manual S 302 10.4784 130 -0.07 75
GU.GORR.HHE. 2020-08-01T12:52:38.30 0.1 positive manual P 302 10.4784 130 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.GORR.HHN. ML:1.9 0.00111030185 0.096 AML other m 2020-08-01T12:52:40.43
GU.GORR.HHE. ML:2.0 0.001375 0.2 AML other m 2020-08-01T12:52:40.32
IV.BOB.HNE. ML:1.8 0.00036435555 0.2432 AML other m 2020-08-01T12:52:44.18
IV.BOB.HNN. ML:1.7 0.00029005575 0.288 AML other m 2020-08-01T12:52:44.53
IV.BOB.HHE. ML:1.8 0.0003840163 0.2432 AML other m 2020-08-01T12:52:44.17
IV.BOB.HHN. ML:1.5 0.0001878592 0.32 AML other m 2020-08-01T12:52:46.12
GU.RNCA.HHE. ML:1.7 0.00020328780000000002 0.1408 AML other m 2020-08-01T12:52:48.65
GU.RNCA.HHN. ML:1.6 0.0001434928 0.1216 AML other m 2020-08-01T12:52:48.64
GU.GRAM.HHN. ML:1.8 0.00014152120000000002 0.4224 AML other m 2020-08-01T12:52:52.84
GU.GRAM.HHE. ML:1.6 0.0000969482 0.2624 AML other m 2020-08-01T12:52:53.38
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