Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 01-09-2021 and time 09:10:31 (UTC) in region 3 km SW Fiastra (MC)

A magnitude ML 0.9 earthquake occured in region: 3 km SW Fiastra (MC), on

  • 01-09-2021 09:10:31 (UTC)
  • 01-09-2021 11:10:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0140, 13.1320 at 4 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
Fiastra MC 3 559 559
Acquacanina MC 4 121 680
Fiordimonte MC 4 202 882
Pievebovigliana MC 7 866 1748
Pieve Torina MC 7 1458 3206
Ussita MC 8 444 3650
Bolognola MC 8 142 3792
Visso MC 10 1107 4899
Muccia MC 11 915 5814
Monte Cavallo MC 11 145 5959
Castelsantangelo sul Nera MC 13 281 6240
Sarnano MC 14 3264 9504
Camerino MC 15 6974 16478
Cessapalombo MC 15 512 16990
Caldarola MC 16 1823 18813
Serravalle di Chienti MC 16 1070 19883
Preci PG 17 724 20607
Camporotondo di Fiastrone MC 17 563 21170
Gualdo MC 18 815 21985
San Ginesio MC 18 3498 25483
Amandola FM 19 3629 29112
Serrapetrona MC 19 966 30078
Montefortino FM 19 1178 31256
Belforte del Chienti MC 19 1886 33142

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Foligno (57155 inhabitants)
61 Km NW of Teramo (54892 inhabitants)
61 Km E of Perugia (166134 inhabitants)
64 Km NE of Terni (111501 inhabitants)
74 Km SW of Ancona (100861 inhabitants)
77 Km N of L'Aquila (69753 inhabitants)
93 Km S of Fano (60888 inhabitants)
100 Km NW of Montesilvano (53738 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 0.9 2021-09-01
09:10:31		 43.0138 13.132 4 2021-09-01
09:38:51		 Sala Sismica INGV-Roma 94909131
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-01 09:10:31 ± 0.24
Latitude 43.0138 ± 0.0054
Longitude 13.1320 ± 0.0111
Depth (km) 4 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94909131

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 910
Semi-minor axis of confidence ellipse (meter) 228
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 69
Circular confidence region, given by single value of horizontal uncertainty (meter) 910.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 124
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.03957
Epicentral distance of station farthest from the epicenter (degree) 0.18076
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 94909131
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-01 09:38:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NRCA.HHZ. 2021-09-01T09:10:39.66 0.6 undecidable manual S 184 20.0688 102 0.59 44
IV.MML1.EHZ. 2021-09-01T09:10:38.56 0.3 undecidable manual S 310 17.0718 104 0.5 69
IV.MC2.EHZ. 2021-09-01T09:10:36.72 0.3 undecidable manual S 158 12.2766 109 0.26 73
IV.CSP1.EHZ. 2021-09-01T09:10:36.03 0.3 undecidable manual S 34 10.4784 112 0.15 75
IV.MML1.EHZ. 2021-09-01T09:10:35.36 0.1 undecidable manual P 310 17.0718 104 -0.12 100
IV.NRCA.HHZ. 2021-09-01T09:10:35.74 0.1 undecidable manual P 184 20.0688 102 -0.32 95
IV.CSP1.EHZ. 2021-09-01T09:10:34.16 0.6 positive manual P 34 10.4784 112 -0.06 51
IV.MC2.EHZ. 2021-09-01T09:10:34.37 0.1 undecidable manual P 158 12.2766 109 -0.19 100
IV.FDMO.HHZ. 2021-09-01T09:10:33.90 0.3 undecidable manual S 305 4.3956 134 -0.18 76
IV.FDMO.HHZ. 2021-09-01T09:10:32.99 0.3 undecidable manual P 305 4.3956 134 -0.19 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSP1.EHN. ML:1.1 0.00019600000000000002 0.32 AML other m 2021-09-01T09:10:36.65
IV.CSP1.EHE. ML:1.1 0.000199 0.28 AML other m 2021-09-01T09:10:36.64
IV.MML1.EHE. ML:0.6 0.00003805 0.18 AML other m 2021-09-01T09:10:39.25
IV.MML1.EHN. ML:0.6 0.0000368 0.7 AML other m 2021-09-01T09:10:39.59
IV.NRCA.HHN. ML:0.7 0.00004485 1.5 AML other m 2021-09-01T09:10:41.92
IV.NRCA.HHE. ML:0.8 0.000049333775 0.16 AML other m 2021-09-01T09:10:41.52
IV.FDMO.HHE. ML:0.0 0.00013135505 0.096 AML other m 2021-09-01T09:10:34.41
IV.FDMO.HHN. ML:0.0 0.00017084635 0.3392 AML other m 2021-09-01T09:10:34.24
IV.MML1.HNE. ML:1.0 0.000092695265 0.9792 AML other m 2021-09-01T09:10:45.94
IV.MML1.HNN. ML:0.9 0.00008542554 0.832 AML other m 2021-09-01T09:10:43.48
IV.NRCA.HNE. ML:1.0 0.00008312242 0.3392 AML other m 2021-09-01T09:10:43.35
IV.NRCA.HNN. ML:1.2 0.0001350147 0.6528 AML other m 2021-09-01T09:10:38.46
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