Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 26-09-2021 and time 00:57:25 (UTC) in region 5 km SE Castelsantangelo sul Nera (MC)

A magnitude ML 0.7 earthquake occured in region: 5 km SE Castelsantangelo sul Nera (MC), on

  • 26-09-2021 00:57:25 (UTC)
  • 26-09-2021 02:57:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8680, 13.2050 at 5 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
Castelsantangelo sul Nera MC 5 281 281
Ussita MC 10 444 725
Montemonaco AP 11 604 1329
Montegallo AP 11 523 1852
Visso MC 12 1107 2959
Norcia PG 12 4957 7916
Arquata del Tronto AP 13 1178 9094
Preci PG 14 724 9818
Montefortino FM 14 1178 10996
Bolognola MC 14 142 11138
Amandola FM 18 3629 14767
Acquacanina MC 18 121 14888
Fiastra MC 19 559 15447
Accumoli RI 20 667 16114
Comunanza AP 20 3166 19280
Acquasanta Terme AP 20 2916 22196

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km E of Foligno (57155 inhabitants)
47 Km NW of Teramo (54892 inhabitants)
57 Km NE of Terni (111501 inhabitants)
60 Km N of L'Aquila (69753 inhabitants)
72 Km E of Perugia (166134 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
87 Km SW of Ancona (100861 inhabitants)
94 Km W of Pescara (121014 inhabitants)
98 Km NW of Chieti (51815 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 0.7 2021-09-26
00:57:25		 42.8682 13.2052 5 2021-09-26
01:07:22		 Sala Sismica INGV-Roma 95883611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-26 00:57:25 ± 0.28
Latitude 42.8682 ± 0.0072
Longitude 13.2052 ± 0.0086
Depth (km) 5 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95883611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 859
Semi-minor axis of confidence ellipse (meter) 230
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 328
Circular confidence region, given by single value of horizontal uncertainty (meter) 860.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 172
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 12
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.22393
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 95883611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-26 01:07:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PP3.EHZ. 2021-09-26T00:57:37.99 3.0 positive manual P -0.01 0
IV.MF5.EHZ. 2021-09-26T00:57:35.28 0.6 undecidable manual S 57 24.5532 102 0.88 38
IV.CSP1.EHZ. 2021-09-26T00:57:34.36 0.3 undecidable manual S 360 24.8529 102 -0.12 72
IV.FDMO.HHZ. 2021-09-26T00:57:33.30 0.3 undecidable manual S 333 20.9679 104 0.11 73
IV.MF5.EHZ. 2021-09-26T00:57:31.34 0.6 undecidable manual P 57 24.5532 102 0.63 42
IV.CSP1.EHZ. 2021-09-26T00:57:30.43 0.6 undecidable manual P 360 24.8529 102 -0.33 46
IV.FDMO.HHZ. 2021-09-26T00:57:29.76 0.6 undecidable manual P 333 20.9679 104 -0.25 47
IV.NRCA.HHZ. 2021-09-26T00:57:29.27 0.3 undecidable manual S 243 8.2806 123 0.17 73
IV.MMO1.EHZ. 2021-09-26T00:57:29.37 0.3 undecidable manual S 71 10.4784 117 -0.39 70
IV.MC2.EHZ. 2021-09-26T00:57:28.31 0.3 undecidable manual S 345 4.995 137 0.1 75
IV.NRCA.HHZ. 2021-09-26T00:57:27.59 0.1 positive manual P 243 8.2806 123 -0.06 100
IV.MMO1.EHZ. 2021-09-26T00:57:27.64 0.6 positive manual P 71 10.4784 117 -0.39 47
IV.MC2.EHZ. 2021-09-26T00:57:27.13 0.6 negative manual P 345 4.995 137 -0.01 51
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:0.0 0.00015039225 0.12 AML other m 2021-09-26T00:57:29.45
IV.NRCA.HNE. ML:0.0 0.00011930200000000002 0.7504 AML other m 2021-09-26T00:57:33.26
IV.NRCA.HNN. ML:0.0 0.00014204643 0.1296 AML other m 2021-09-26T00:57:29.85
IV.CSP1.EHE. ML:0.6 0.0000236313625 43.9 AML other m 2021-09-26T00:57:30.22
IV.CSP1.EHN. ML:0.6 0.000023649549999999998 1.02 AML other m 2021-09-26T00:57:44.07
IV.MF5.EHE. ML:0.7 0.00003375794 45.86 AML other m 2021-09-26T00:57:30.98
IV.MF5.EHN. ML:0.9 0.000054383765 3.12 AML other m 2021-09-26T00:57:40.85
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