Earthquake with magnitude of ML 1.7 on date 19-08-2021 and time 10:06:34 (Italy) in region 9 km SE Castelsantangelo sul Nera (MC)

A magnitude ML 1.7 earthquake occured in region: 9 km SE Castelsantangelo sul Nera (MC), on

  • 19-08-2021 08:06:34 (UTC)
  • 19-08-2021 10:06:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8310, 13.2160 at 14 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.

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 9 281 281
Arquata del Tronto AP 9 1178 1459
Montegallo AP 10 523 1982
Norcia PG 11 4957 6939
Montemonaco AP 12 604 7543
Ussita MC 14 444 7987
Visso MC 15 1107 9094
Accumoli RI 15 667 9761
Preci PG 15 724 10485
Montefortino FM 16 1178 11663
Acquasanta Terme AP 17 2916 14579
Bolognola MC 18 142 14721

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km E of Foligno (57155 inhabitants)
44 Km W of Teramo (54892 inhabitants)
55 Km NE of Terni (111501 inhabitants)
55 Km N of L'Aquila (69753 inhabitants)
74 Km E of Perugia (166134 inhabitants)
84 Km W of Montesilvano (53738 inhabitants)
91 Km S of Ancona (100861 inhabitants)
91 Km W of Pescara (121014 inhabitants)
94 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
Bulletin
Rev1000
ML 1.7 2021-08-19
08:06:34
42.831 13.2157 14 2021-12-29
11:12:35
Bollettino Sismico Italiano INGV 96321271
Reviewed
Rev100
ML 1.8 2021-08-19
08:06:34
42.8313 13.2187 15 2021-08-19
08:16:46
Sala Sismica INGV-Roma 94364771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-19 08:06:34 ± 0.11
Latitude 42.8310 ± 0.0045
Longitude 13.2157 ± 0.0074
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96321271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 580
Semi-minor axis of confidence ellipse (meter) 330
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 48
Circular confidence region, given by single value of horizontal uncertainty (meter) 580.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 146
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.35253
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 6
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 94364771
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-19 08:16:46

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 96321271
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-07 14:00:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
MN.CLTB.HHZ. 2021-08-19T08:07:10.89 3.0 positive manual Pn -4.58 0
IV.LRP.EHZ. 2021-08-19T08:07:03.73 3.0 undecidable manual Sn -1.03 0
GU.MGRO.HHZ. 2021-08-19T08:06:55.12 3.0 undecidable manual Sn 2.11 0
CR.STON.BHZ. 2021-08-19T08:06:51.24 3.0 undecidable manual Pn 7.41 0
IV.MML1.EHZ. 2021-08-19T08:06:47.20 0.3 undecidable manual S 328 37.0296 97 -0.02 72
IV.TERO.HHZ. 2021-08-19T08:06:47.87 0.3 undecidable manual S 126 39.1275 96 0.09 70
IV.AGLI.HHZ. 2021-08-19T08:06:45.11 3.0 undecidable manual Pg 12.82 0
IV.MTRA.EHZ. 2021-08-19T08:06:42.03 0.3 undecidable manual S 119 16.872 115 0.05 74
IV.TERO.HHZ. 2021-08-19T08:06:41.82 0.6 undecidable manual P 126 39.1275 96 -0.48 44
IV.MML1.EHZ. 2021-08-19T08:06:41.86 0.3 undecidable manual P 328 37.0296 97 -0.12 71
IV.MMO1.EHZ. 2021-08-19T08:06:40.70 0.1 undecidable manual S 50 11.7771 129 -0.12 97
IV.SARZ.HHZ. 2021-08-19T08:06:40.14 3.0 undecidable manual Sn 5.21 0
IV.MC2.EHZ. 2021-08-19T08:06:40.39 0.1 undecidable manual S 346 9.1797 138 0.08 100
IV.NRCA.HNZ. 2021-08-19T08:06:39.94 0.1 undecidable manual S 272 8.2806 142 -0.21 97
IV.MTRA.EHZ. 2021-08-19T08:06:39.01 0.1 undecidable manual P 119 16.872 115 0.05 99
IV.PAOL.HHZ. 2021-08-19T08:06:39.93 3.0 undecidable manual Pn 3.79 0
IV.MC2.EHZ. 2021-08-19T08:06:38.17 0.1 negative manual P 346 9.1797 138 0.18 98
IV.MMO1.EHZ. 2021-08-19T08:06:38.36 0.1 undecidable manual P 50 11.7771 129 0.07 99
IV.NRCA.HNZ. 2021-08-19T08:06:38.04 0.1 positive manual P 272 8.2806 142 0.14 98
IV.SENA.HHZ. 2021-08-19T08:06:36.05 3.0 undecidable manual Pn -3.4 0
IV.CSNT.HHZ. 2021-08-19T08:06:29.50 3.0 undecidable manual Sg 9.31 0
IV.ZEN8.EHZ. 2021-08-19T08:06:26.00 3.0 undecidable manual Sg 4.48 0
IV.MBAL.EHZ. 2021-08-19T08:06:25.37 3.0 undecidable manual Sg 3.63 0
IV.CADC.EHZ. 2021-08-19T08:06:21.32 3.0 undecidable manual Sn -2.57 0
IV.FIR.HHZ. 2021-08-19T08:06:15.87 3.0 undecidable manual Sn -0.06 0
GU.MGRO.HHZ. 2021-08-19T08:06:15.15 3.0 undecidable manual Pn -2.73 0
IV.EUCT.HNZ. 2021-08-19T08:06:03.67 3.0 negative manual Pn -3.17 0
IV.TREG.HNZ. 2021-08-19T08:05:59.66 3.0 positive manual Pg 1.5 0
IV.VOBA.EHZ. 2021-08-19T08:05:55.44 3.0 positive manual Pn -5.64 0
IV.FNVD.HHZ. 2021-08-19T08:05:55.22 3.0 undecidable manual Pn 0.16 0
IV.OPPE.HHZ. 2021-08-19T08:05:53.77 3.0 positive manual Pn -2.82 0
IV.NDIM.HNZ. 2021-08-19T08:05:53.97 3.0 positive manual P -1.32 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:1.8 0.00072245685 0.64 AML other m 2021-08-19T08:06:40.46
IV.NRCA.HHE. ML:1.9 0.0008405 0.06 AML other m 2021-08-19T08:06:40.14
IV.NRCA.HHN. ML:2.0 0.0010645989999999998 0.7168 AML other m 2021-08-19T08:06:40.58
IV.NRCA.HNN. ML:1.9 0.0009045 0.12 AML other m 2021-08-19T08:06:40.52
IV.MTRA.EHN. ML:1.1 0.00009920000000000001 0.26 AML other m 2021-08-19T08:06:42.58
IV.MTRA.EHE. ML:1.1 0.000102310045 0.1024 AML other m 2021-08-19T08:06:42.61
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