Earthquake with magnitude of ML 1.0 on date 26-09-2021 and time 10:01:07 (Italy) in region 2 km W Norcia (PG)

A magnitude ML 1.0 earthquake occured in region: 2 km W Norcia (PG), on

  • 26-09-2021 08:01:07 (UTC)
  • 26-09-2021 10:01:07 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.795, 13.072 at 11 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
Norcia PG 2 4957 4957
Cascia PG 10 3217 8174
Preci PG 10 724 8898
Cerreto di Spoleto PG 13 1075 9973
Castelsantangelo sul Nera MC 13 281 10254
Poggiodomo PG 14 117 10371
Visso MC 15 1107 11478
Sellano PG 16 1079 12557
Vallo di Nera PG 17 364 12921
Ussita MC 18 444 13365
Accumoli RI 18 667 14032
Arquata del Tronto AP 19 1178 15210
Monteleone di Spoleto PG 19 599 15809

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SE of Foligno (57155 inhabitants)
43 Km NE of Terni (111501 inhabitants)
54 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
66 Km SE of Perugia (166134 inhabitants)
90 Km E of Viterbo (67173 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
94 Km W of Montesilvano (53738 inhabitants)
95 Km N of Tivoli (56533 inhabitants)
99 Km SW of Ancona (100861 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.0 2021-09-26
08:01:07
42.7947 13.0717 11 2021-09-26
08:07:50
Sala Sismica INGV-Roma 95893421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-26 08:01:07 ± 0.04
Latitude 42.7947 ± 0.0027
Longitude 13.0717 ± 0.0049
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95893421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 450
Semi-minor axis of confidence ellipse (meter) 126
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 296
Circular confidence region, given by single value of horizontal uncertainty (meter) 450
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 98
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.31296
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 15
Type of magnitude ML
Reference to an origin 95893421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-26 08:07:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PP3.EHZ. 2021-09-26T08:01:22.70 3.0 negative manual P 0.05 0
IV.CSP1.EHZ. 2021-09-26T08:01:19.77 0.3 undecidable manual S 18 0.313 50 0.07 70
IV.RM33.EHZ. 2021-09-26T08:01:19.75 0.3 undecidable manual S 160 0.304 50 0.3 68
IV.FDMO.HHZ. 2021-09-26T08:01:17.38 0.3 undecidable manual S 3 0.2419 50 -0.22 71
IV.MURB.HHZ. 2021-09-26T08:01:17.81 3.0 positive manual P -1.74 0
IV.LNSS.HHZ. 2021-09-26T08:01:16.02 0.3 undecidable manual S 187 0.1934 50 -0.14 72
IV.MMO1.EHZ. 2021-09-26T08:01:16.72 0.3 undecidable manual S 61 0.214 50 -0.06 73
IV.GAVE.EHZ. 2021-09-26T08:01:15.32 0.1 undecidable manual S 232 0.1655 121 -0.01 97
IV.RM33.EHZ. 2021-09-26T08:01:14.58 0.1 undecidable manual P 160 0.304 50 0 96
IV.CSP1.EHZ. 2021-09-26T08:01:14.59 0.1 undecidable manual P 18 0.313 50 -0.13 94
IV.MC2.EHZ. 2021-09-26T08:01:14.98 0.1 undecidable manual S 36 0.1448 124 0.32 94
IV.MTRA.HNZ. 2021-09-26T08:01:13.30 0.1 undecidable manual P 99 0.241 50 -0.2 93
IV.CESI.HNE. 2021-09-26T08:01:13.54 0.1 undecidable manual P 330 0.2428 50 0 96
IV.FDMO.HHZ. 2021-09-26T08:01:13.34 0.1 undecidable manual P 3 0.2419 50 -0.17 95
IV.LNSS.HHZ. 2021-09-26T08:01:12.61 0.1 positive manual P 187 0.1934 50 -0.07 97
IV.NRCA.HHZ. 2021-09-26T08:01:12.06 0.1 undecidable manual S 39 0.0504 153 -0.1 97
IV.GAVE.EHZ. 2021-09-26T08:01:12.24 0.1 undecidable manual P 232 0.1655 121 0.04 97
IV.MMO1.EHZ. 2021-09-26T08:01:12.96 0.3 undecidable manual P 61 0.214 50 -0.08 72
IT.MTCL.HGN. 2021-09-26T08:01:12.87 0.3 undecidable manual P 345 0.2059 50 -0.03 73
IV.MC2.EHZ. 2021-09-26T08:01:11.92 0.1 undecidable manual P 36 0.1448 124 0.1 98
IV.NRCA.HHZ. 2021-09-26T08:01:10.48 0.1 undecidable manual P 39 0.0504 153 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:1.8 0.00085 0.12 AML other m 2021-09-26T08:01:12.21
IV.NRCA.HHN. ML:1.8 0.0008505 0.12 AML other m 2021-09-26T08:01:12.21
IV.NRCA.HHE. ML:1.8 0.000909 0.08 AML other m 2021-09-26T08:01:12.22
IV.NRCA.HNE. ML:1.7 0.0007985 0.08 AML other m 2021-09-26T08:01:12.22
IV.GAVE.EHE. ML:1.2 0.0001185 0.38 AML other m 2021-09-26T08:01:15.50
IV.GAVE.EHN. ML:1.2 0.00013 0.12 AML other m 2021-09-26T08:01:15.71
IV.LNSS.HHE. ML:1.1 8.315E-5 0.12 AML other m 2021-09-26T08:01:16.43
IV.LNSS.HHN. ML:1.2 0.0001055 0.12 AML other m 2021-09-26T08:01:16.53
IV.FDMO.HHE. ML:0.7 2.705E-5 1.88 AML other m 2021-09-26T08:01:18.94
IV.FDMO.HHN. ML:1 5.345E-5 0.12 AML other m 2021-09-26T08:01:18.09
IV.GAVE.HNE. ML:1.1 9.1056935E-5 0.1856 AML other m 2021-09-26T08:01:16.00
IV.GAVE.HNN. ML:1.1 9.6846E-5 0.3776 AML other m 2021-09-26T08:01:15.60
IV.LNSS.HNE. ML:1.1 8.7669555E-5 0.128 AML other m 2021-09-26T08:01:16.49
IV.LNSS.HNN. ML:1.3 0.000140002045 0.6976 AML other m 2021-09-26T08:01:16.53
IV.RM33.EHE. ML:0.6 1.7356305E-5 0.16 AML other m 2021-09-26T08:01:21.09
IV.RM33.EHN. ML:0.7 2.05283E-5 0.1024 AML other m 2021-09-26T08:01:19.98
IV.RM33.HNE. ML:0.8 2.718400325E-5 1.024 AML other m 2021-09-26T08:01:20.60
IV.CSP1.EHE. ML:0.9 3.6550987E-5 0.1024 AML other m 2021-09-26T08:01:20.79
IV.CSP1.EHN. ML:1 4.2612575E-5 0.224 AML other m 2021-09-26T08:01:20.83
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