Earthquake with magnitude of ML 0.8 on date 05-04-2021 and time 00:58:34 (Italy) in region 6 km N Montereale (AQ)

A magnitude ML 0.8 earthquake occured in region: 6 km N Montereale (AQ), on

  • 04-04-2021 22:58:34 (UTC)
  • 05-04-2021 00:58:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.576, 13.231 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
Montereale AQ 6 2581 2581
Cittareale RI 7 482 3063
Amatrice RI 8 2657 5720
Capitignano AQ 8 665 6385
Borbona RI 11 617 7002
Campotosto AQ 12 542 7544
Posta RI 12 694 8238
Cagnano Amiterno AQ 13 1369 9607
Accumoli RI 13 667 10274
Barete AQ 15 737 11011
Pizzoli AQ 16 4326 15337
Micigliano RI 20 127 15464

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km NW of L'Aquila (69753 inhabitants)
40 Km W of Teramo (54892 inhabitants)
48 Km E of Terni (111501 inhabitants)
60 Km SE of Foligno (57155 inhabitants)
76 Km W of Montesilvano (53738 inhabitants)
76 Km NE of Guidonia Montecelio (88673 inhabitants)
77 Km NE of Tivoli (56533 inhabitants)
81 Km W of Chieti (51815 inhabitants)
82 Km W of Pescara (121014 inhabitants)
91 Km SE of Perugia (166134 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
98 Km NE of Roma (2864731 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 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 0.8 2021-04-04
22:58:34
42.5763 13.2308 11 2021-04-04
23:11:05
Sala Sismica INGV-Roma 88777431
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-04 22:58:34 ± 0.14
Latitude 42.5763 ± 0.0072
Longitude 13.2308 ± 0.0085
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 88777431

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 790
Semi-minor axis of confidence ellipse (meter) 194
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 342
Circular confidence region, given by single value of horizontal uncertainty (meter) 790
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 110
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.27789
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.4
Num. used stations 16
Type of magnitude ML
Reference to an origin 88777431
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-04 23:11:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ACATE.EHZ. 2021-04-04T23:00:11.23 3.0 positive manual Pg 15.85 0
IV.MTMR.EHZ. 2021-04-04T22:59:43.00 3.0 undecidable manual Sg 8.55 0
MN.TRI.HHZ. 2021-04-04T22:59:21.86 3.0 positive manual Pn -0.5 0
IV.APRC.HHZ. 2021-04-04T22:59:10.60 3.0 undecidable manual Pg 5.45 0
IV.CAFI.HNZ. 2021-04-04T22:58:54.58 3.0 undecidable manual P 0.05 0
IV.NRCA.HHZ. 2021-04-04T22:58:44.49 0.6 undecidable manual S 342 0.2707 50 -0.34 46
IV.TERO.HHZ. 2021-04-04T22:58:44.39 0.3 undecidable manual S 80 0.2779 50 -0.66 62
IV.TERO.HHZ. 2021-04-04T22:58:41.00 0.1 undecidable manual P 80 0.2779 50 0.49 87
IV.LNSS.HHZ. 2021-04-04T22:58:41.07 0.6 undecidable manual S 281 0.143 124 0.1 49
IV.NRCA.HHZ. 2021-04-04T22:58:40.31 0.6 undecidable manual P 342 0.2707 50 -0.07 48
IV.SMA1.EHZ. 2021-04-04T22:58:39.59 0.6 undecidable manual S 55 0.0935 136 0.06 50
IV.RM33.EHZ. 2021-04-04T22:58:38.69 0.6 undecidable manual S 190 0.0683 145 -0.22 47
IV.T1299.HNZ. 2021-04-04T22:58:38.86 0.6 undecidable manual S 33 0.0692 145 -0.06 49
IV.LNSS.HHZ. 2021-04-04T22:58:38.15 1.0 undecidable manual P 281 0.143 124 -0.01 25
IV.SMA1.EHZ. 2021-04-04T22:58:37.48 0.1 undecidable manual P 55 0.0935 136 0.15 98
IV.T1299.HNZ. 2021-04-04T22:58:37.05 0.1 undecidable manual P 33 0.0692 145 0.08 100
IV.RM33.EHZ. 2021-04-04T22:58:36.97 0.6 undecidable manual P 190 0.0683 145 0 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHE. ML:0.6 4.8710835E-5 0.1152 AML other m 2021-04-04T22:58:38.96
IV.RM33.EHN. ML:0.3 3.1012245E-5 0.064 AML other m 2021-04-04T22:58:38.89
IV.RM33.HNE. ML:0.6 5.3778865E-5 0.5248 AML other m 2021-04-04T22:58:38.51
IV.RM33.HNN. ML:1 0.000139079605 0.8832 AML other m 2021-04-04T22:58:38.72
IV.LNSS.HHE. ML:0.4 2.607363E-5 0.128 AML other m 2021-04-04T22:58:41.38
IV.LNSS.HHN. ML:0 1.210672E-5 0.256 AML other m 2021-04-04T22:58:42.49
IV.LNSS.HNE. ML:1.1 0.00010338905 0.5888 AML other m 2021-04-04T22:58:47.69
IV.LNSS.HNN. ML:1.1 0.00010456912 0.5504 AML other m 2021-04-04T22:58:43.87
IV.NRCA.HHE. ML:0.9 3.44585E-5 0.1024 AML other m 2021-04-04T22:58:44.00
IV.NRCA.HHN. ML:0.7 2.32272985E-5 0.1152 AML other m 2021-04-04T22:58:45.43
IV.NRCA.HNE. ML:1.4 0.00013462925 0.9088 AML other m 2021-04-04T22:58:44.03
IV.NRCA.HNN. ML:1.6 0.000185614335 0.768 AML other m 2021-04-04T22:58:55.17
IV.TERO.HHE. ML:0.5 1.34869485E-5 0.8192 AML other m 2021-04-04T22:58:48.34
IV.TERO.HHN. ML:0.3 8.525133E-6 0.2432 AML other m 2021-04-04T22:58:44.56
IV.TERO.HNE. ML:1.5 0.00014498515 0.9984 AML other m 2021-04-04T22:58:44.21
IV.TERO.HNN. ML:1.6 0.00020392815 1.3184 AML other m 2021-04-04T22:58:46.15
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