Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 26-01-2021 and time 02:41:18 (Italy) in region 4 km E Nocera Umbra (PG)

A magnitude ML 1.0 earthquake occured in region: 4 km E Nocera Umbra (PG), on

  • 26-01-2021 01:41:18 (UTC)
  • 26-01-2021 02:41:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.09, 12.84 at 9 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
Nocera Umbra PG 4 5839 5839
Valtopina PG 8 1398 7237
Serravalle di Chienti MC 10 1070 8307
Sefro MC 11 422 8729
Fiuminata MC 13 1402 10131
Pioraco MC 15 1134 11265
Gualdo Tadino PG 16 15208 26473
Muccia MC 17 915 27388
Monte Cavallo MC 17 145 27533
Spello PG 18 8645 36178
Pieve Torina MC 18 1458 37636
Assisi PG 18 28299 65935
Foligno PG 19 57155 123090
Camerino MC 19 6974 130064
Esanatoglia MC 20 2034 132098

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km NE of Foligno (57155 inhabitants)
37 Km E of Perugia (166134 inhabitants)
61 Km N of Terni (111501 inhabitants)
80 Km SW of Ancona (100861 inhabitants)
85 Km S of Fano (60888 inhabitants)
86 Km NW of Teramo (54892 inhabitants)
88 Km E of Arezzo (99543 inhabitants)
91 Km S of Pesaro (94582 inhabitants)
94 Km NW of L'Aquila (69753 inhabitants)
96 Km NE of Viterbo (67173 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.0 2021-01-26
01:41:18		 43.09 12.84 9 2021-01-26
02:07:43		 Sala Sismica INGV-Roma 86582871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-26 01:41:18 ± 0.03
Latitude 43.09 ± 0.00
Longitude 12.84 ± 0.00
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86582871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 192
Semi-minor axis of confidence ellipse (meter) 120
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 205
Circular confidence region, given by single value of horizontal uncertainty (meter) 190
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 97
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.09
Epicentral distance of station closest to the epicenter (degree) 0.10072
Epicentral distance of station farthest from the epicenter (degree) 0.40559
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 86582871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-26 02:07:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2021-01-26T01:41:33.66 0.6 undecidable manual S 118 0.4056 50 0.03 48
IV.EL6.EHZ. 2021-01-26T01:41:30.57 0.6 undecidable manual S 39 0.304 50 -0.04 49
IV.MURB.HHZ. 2021-01-26T01:41:30.20 0.3 undecidable manual S 307 0.2851 50 0.14 72
IV.CSP1.EHZ. 2021-01-26T01:41:29.56 0.6 undecidable manual S 90 0.2671 50 0.05 49
IV.MMO1.EHZ. 2021-01-26T01:41:27.22 1.0 undecidable manual P 118 0.4056 50 -0.13 23
IV.ATCC.EHZ. 2021-01-26T01:41:26.27 0.3 undecidable manual S 302 0.1718 116 0.14 74
IV.SNTG.HHZ. 2021-01-26T01:41:26.25 0.3 undecidable manual S 25 0.1781 115 -0.08 74
IV.FDMO.HHZ. 2021-01-26T01:41:26.78 0.3 undecidable manual S 107 0.1898 114 0.02 75
IV.EL6.EHZ. 2021-01-26T01:41:25.48 0.3 positive manual P 39 0.304 50 -0.12 72
IV.CSP1.EHZ. 2021-01-26T01:41:24.87 0.6 negative manual P 90 0.2671 50 -0.1 49
IV.ASSB.HHZ. 2021-01-26T01:41:24.90 0.3 undecidable manual S 249 0.1412 121 -0.19 73
IV.FDMO.HHZ. 2021-01-26T01:41:23.38 0.3 positive manual P 107 0.1898 114 0 75
IV.MURB.HHZ. 2021-01-26T01:41:23.51 3.0 undecidable manual P 307 0.2851 50 -1.77 0
IV.ATCC.EHZ. 2021-01-26T01:41:23.03 0.3 positive manual P 302 0.1718 116 0.01 75
IV.CESI.HHZ. 2021-01-26T01:41:23.92 0.6 undecidable manual S 152 0.1007 130 0.12 50
IV.SNTG.HHZ. 2021-01-26T01:41:23.19 0.6 undecidable manual P 25 0.1781 115 0.06 50
IV.ASSB.HHZ. 2021-01-26T01:41:22.34 0.1 positive manual P 249 0.1412 121 -0.07 100
IV.CESI.HHZ. 2021-01-26T01:41:21.80 0.3 undecidable manual P 152 0.1007 130 0.13 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:0.9 5.285E-5 1.78 AML other m 2021-01-26T01:41:26.07
IV.FDMO.HHN. ML:1.2 0.0001168 0.16 AML other m 2021-01-26T01:41:26.97
IV.CESI.HHE. ML:0.3 2.6392231E-5 0.1 AML other m 2021-01-26T01:41:24.21
IV.CESI.HHN. ML:0.4 3.2623305E-5 0.16 AML other m 2021-01-26T01:41:26.22
IV.CESI.HNE. ML:1.1 0.00015465515 0.82 AML other m 2021-01-26T01:41:22.76
IV.CESI.HNN. ML:1.1 0.00014470025 1.02 AML other m 2021-01-26T01:41:21.98
IV.ASSB.HHE. ML:0.7 4.893607E-5 0.08 AML other m 2021-01-26T01:41:26.48
IV.ASSB.HHN. ML:0.7 4.672788E-5 0.12 AML other m 2021-01-26T01:41:25.62
IV.ATCC.EHE. ML:1.4 0.00017728505 0.12 AML other m 2021-01-26T01:41:26.47
IV.ATCC.EHN. ML:1.1 9.87443E-5 0.18 AML other m 2021-01-26T01:41:26.40
IV.SNTG.HHE. ML:0.6 2.8844605E-5 0.1 AML other m 2021-01-26T01:41:27.47
IV.SNTG.HHN. ML:0.7 3.256778E-5 0.16 AML other m 2021-01-26T01:41:26.81
IV.SNTG.HNE. ML:1.4 0.0002068812 0.7008 AML other m 2021-01-26T01:41:29.65
IV.SNTG.HNN. ML:1.4 0.00020837575 0.6896 AML other m 2021-01-26T01:41:27.58
IV.CSP1.EHE. ML:1.4 0.000129552055 1.1 AML other m 2021-01-26T01:41:24.38
IV.CSP1.EHN. ML:1.1 5.775923E-5 0.14 AML other m 2021-01-26T01:41:30.14
IV.EL6.EHE. ML:1.3 8.2421165E-5 0.14 AML other m 2021-01-26T01:41:30.77
IV.EL6.EHN. ML:1.2 6.6914394E-5 0.12 AML other m 2021-01-26T01:41:31.00
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download